Acer Aspire 6530G is equipped with 16-inch widescreen LCD display and multiple USB 2.0 and video output interfaces, the RJ45 network interface, audio interface equipped with a stereo microphone input port, stereo headphone / line out port, power connector, efficient lithium battery, the theoretical use of time for about three hours.

Acer Aspire 6530G Laptop Specs:

Processor: AMD Turion(tm) X2 dual-core mobile technology RM-72 (2.1 GHz, 800MHz FSB, 1MB L2 Cache),
Display: 16″ WXGA Acer CrystalBrite(tm) LCD TFT 16:9 Aspect Ratio, 1366 x 768 Resolution
Memory: 4GB DDR2 (2*2GB RAM)
HD Capacity: 320GB 5400rpm 5400 Hard Disk Drive
Optical Drive: Blu-Ray / 8X DVD-Super Multi double-layer drive
Graphics Card: ATI Mobility Radeon(tm) HD 3650 512MB
Operating System: Genuine Windows Vista® Home Premium
Networking: Acer InviLink(tm) Nplify(tm), 802.11b/g/Draft-N Wi-Fi
Additional Features:
Integrated 0.3MP Webcam
5 in 1 card reader (SD), (MMC), (MS), (MS PRO), (XD)
Fingerprint Reader
Full HD 1080 Playback, 8ms High-def response, HDMI out
Dolby®-optimized surround sound system with two built-in stereo speakers and one subwoofer supporting low-frequency effects
True5.1-channel surround sound output
I/O Interface:
1x Acer EasyPort IV connector
1x ExpressCard(tm)/54 slot
Acer Bio-Protection fingerprint reader
5-in-1 card reader (SD(tm), MMC, MS, MS PRO, xD)
4x USB 2.0 ports (1x USB 2.0 port combined with eSATA port)
1x HDMI(tm) port with HDCP support
1x Consumer infrared (CIR) port
1x external display (VGA) port
1x Headphones/speaker/line-out jack with S/PDIF support
1x Microphone-in jack
1x Line-in jack
1x Modem (RJ-11) port
1x Ethernet (RJ-45) port
1x DC-in jack for AC adapter

For unrivalled audio and video experience, look no further than the Aspire 6530G. A panoramic 16″ HD screen with high resolution and 16:9 aspect ratio brings you to another level of watching high-def movies and videos.

The optimized 2nd Generation Dolby Home Theater technology, Blu-ray Disc playback, Acer Tuba CineBass booster, and True 5.1-channel surround sound output guarantee immersive and captivating multimedia entertainment that will leave you breathless. The Acer MediaTouch keys feature a convenient touch-sensitive interface, giving you total control over your multimedia.

Surfing the web is easier and quicker with the ultra-fast AMD dual-core mobile technology processor. Enjoy express wireless connections and download digital media with the fast Acer wireless module.

With 4GB of RAM and a large 250GB Hard Drive, you can store all your multimedia files without worrying about storage space. A powerful ATI Radeon 3650 graphics solution will optimize your games and creative applications, making this notebook your ideal partner.

These include a Blu-ray drive, a 16:9 widescreen display and advanced expansion options such as HDMI, S/PDIF and eSATA. The metallic blue pattern on the lid and the textured grey keyboard panel are smart and modern, and contribute to the impression that this laptop is more expensive than it really is.

Replacement Li-ion ACER Aspire 6530G battery for sale: Li-ion, 4400mAh, 14.8V(incompatible with 10.8v/11.1v), brand-new battery! Do you need it? The ACER Aspire 6530G batteries are rigorously tested for voltage, capacity, compatibility and safety to exceed original equipment manufacturer specifications. The ACER Aspire 6530g battery is designed to be 100% compatible with ACER OEM part numbers Aspire 5230 , Aspire 5235 , Aspire 5310 , Aspire 5315 , Aspire 5330

The keyboard isn’t the best in this group, but it’s firm and has a standard layout. Acer has squeezed in a number pad, and as a result the keys are slightly smaller than those on other models here. They’re made of a shiny plastic that feels slightly sticky, but their action is light and crisp with good feedback. The large touchpad is simply an indentation in the case, and is smooth and responsive.

The 6530G’s 16in widescreen display has a resolution of 1,366×768, with excellent colour accuracy and brightness. Contrast was also good. There’s an HDMI port if you’d prefer to show Blu-ray movies on a TV.

The 6530G has an eSATA port that doubles as a USB port, plus an S/PDIF output. With Dolby Home Theater audio processing, the built-in speakers produce decent sound with good stereo separation, but the S/PDIF output gives you the option of plugging in a home cinema amplifier. There’s also a decent ATI 3650 graphics chipset, which produced the best scores in our gaming benchmarks for this price category. It’s not powerful enough for the latest action games, but it’ll bring the best out of slow-paced strategy and adventure games.

The 2GHz AMD Turion RM-70 processor isn’t very fast, and this laptop came bottom in our Windows performance tests, despite having 4GB of RAM. It’s fine for standard Windows applications, but tasks such as editing HD video will be too much for it.

Despite this, the 6530G is an outstanding budget laptop. The Blu-ray drive, high-quality display and ACER Aspire 6530G laptop battery life of just over three hours make this laptop our clear Budget Buy winner.

1 battery charge and discharge times is directly related to battery life, the general lithium ibm battery charge and discharge times of only 400 to 600 times, improved product, but 800 times to recharge a battery to use the end of a step forward. (When less than 85% power of the battery charge will be recorded and increase the number of times on a single charge). For this reason, when the battery voltage is greater than the starting value of the charging battery management program set 96%, and you there are places in 220V AC power, we should try to use the AC power supply to minimize the number of charging of the battery to extend battery life.

The lithium IBM laptop batteries do not have to be away from the machine, because the boot will not be a power greater than 96% of the battery charging. But even so, if you are a long-term rarely used battery using AC power, it is recommended or remove the battery from the machine to be better, because the heat generated in the long-running laptop, the battery will cause some damage. It should be noted, In such cases, once the AC power supply power, your unsaved data will be lost without the support of the battery, this have a loss, the user must carefully weigh.

(2) When the power for 3 ~ 5%, should be timely to charge the IBM Laptop battery, otherwise battery self-discharge phenomenon will cause discharge and damage the battery, charging machines at shutdown, suspend any state, you can also side by side rechargeable .
The charge must be a full, otherwise it will damage the battery. This is to reduce the increase in charge with the cycle number of charge cycles and shorten the battery life; rather than memory characteristics due to the memory characteristics, lithium batteries like nickel-cadmium batteries and nickel metal hydride batteries, lithium IBM laptop batteries do not have the “memory-based to avoid characteristics “.
If the charging machine at shutdown or hibernation, when the charge to 3 to 4 hours of green power status indicator is no longer beating, electricity has reached 100%, shall promptly disconnect the AC power plug to prevent causing battery overcharge. damage the battery.
Such as charging machines waiting to hang or through charging with the state, when the charge to 3 to 4 hours of green power status indicator is no longer beating, the battery will automatically exit the state of charge.
Charging process for fast charging when the power status light is yellow (Always), transferred to the trickle current charge slowly charges up to a certain value, then the power status indicator, the color becomes a flashing green ; has been full of 100%, it becomes green (Always). Lithium battery charging process is the constant pressure mode, and start charging voltage is stabilized, while the current is getting smaller and smaller.

(3) the power is not completely exhausted (ie, power in the 5 to 100%), not the battery charging, otherwise it will shorten the charge with the cycle to increase the number of charge cycles and shorten battery life.

When using IBM battery power for 5 to 95% should be, so when use the AC adapter will charge the battery (through charging with the state).

When out of power for 96 to 100% or the battery from the machine, you can use the AC power adapter is switched on, the use of the AC power adapter, please AC power adapter’s DC output plug into the machine, and then AC power plug into the outlet of 220V ~; remove the AC power adapter, you should unplug the AC power plug and then unplug the AC power adapter’s DC output plug from the machine. Otherwise, might you damage the equipment.

When using the AC power adapter, when plugged into the AC power plug 220V ~ socket on the power status indicator on the machine is not yet kindle (Note: during which time about 5 seconds) please press the power button to boot; shut down or into hibernation, in addition to all other lights are off in the green power status indicator, time from 220V ~ socket unplug the AC power plug (not later than 5 seconds), about 5 seconds after the AC power plug from the The green power status indicator goes out; otherwise will overcharge the battery causing damage to the battery. Remove the state shutdown state, AC power adapter is still non-system power management procedures and the battery of the power management chip interface circuit for about 5 seconds will automatically be transferred to the off state of charge, the battery charge. (If necessary, from time to unplug the AC power adapter’s DC output plug from the machine, then the battery will not reverse discharge through the AC power adapter.)

If you pause the machine into standby or suspend state, do not unplug the AC power plug from the outlet 220V ~; so when the machine still have the power to maintain. (Not recommended time machine into standby or suspend state to care for your machine.)

IBM ThinkPad notebook computer information technology indicators marked “battery manufacturers especially under the conditions measured, the index can not be achieved under the conditions of normal use of the notebook such as: information technology indicators marked “battery” of four hours in normal use, we can only get about 3.5 hours of battery power supply. If you are very far, and still under warranty, Please click here to contact IBM.

Resource from: http://www.ibm-laptop-batteries.ca/articles/IBM-laptop-battery-using-tips.htm

This is not only easy to go out to bring fashion to pull the wind, can be sufficient to meet the daily Internet, enjoy high-definition audio and video. [ Back to the Tianjin Quotes Home ]
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Dell Mini10-216 design is simple and beautiful, this machine uses black for the Patron color, itself embedded in a circular DELL brand logo, elegant and clear. The interior, with a 10.1- inch LCD screen with 16:9 golden ratio, support the resolution of 1024 * 600 high-definition screen, display the image is clear and fluent. The integrated camera at the top of the screen, easy daily video chat.
Dell Mini10-216 subsection are contained online small ride clocked at 1.66GHz Intel Atom N455 processor also has a 667MHz FSB process and 512KB of L2 cache, based on mainstream Intel NM10 motherboard chipset; storage, the comes standard with 2GB of DDR2 667MHz memory , 250GB hard drive, and integrated processor Intel GMA 3150 integrated graphics . Built-in audio piece; network, built-in 100Mbps LAN and Wireless LAN, support for Bluetooth transmission. Excellent Internet audio-visual and other entertainment features can be achieved.
Edit Comment: Dell Mini10-216 with the Internet of the characteristics of small, thin body beautiful, pull the wind out easy portable fashion; in online small mainstream hardware configuration enough users daily Internet access, audio-visual and other applications. The books in the selling price is very affordable. Like a friend to business to the detailed look. [Back to Tianjin Quotes Home]
Tips: Stay Pacific Internet Tianjin Railway Station , we will strive to provide you with the most professional IT market reported If you have any questions, we will be happy to serve you a sincere welcome to you can continue to provide us with valuable advice.

HP Envy series launched two types of 15.6 inches and 13 inches, corresponding to the Apple products of the same size. The evaluation of this today is the Envy 15, in addition to look good, the configuration is also very strong. Its shiny shell, not only hide the Intel quad-core Core i7 processor, ATI Mobility Radeon 4.83 thousand alone significantly, playing the game to be very smooth. This personality advantage, the difference between the Hewlett-Packard hard to emphasize the Envy 15 similar products with Apple.

Before us into the quagmire of technical rhetoric, take a look at the design of the HP Envy 15. Although the similarity with Apple is no shirk, but the HP Envy 15 In contrast, there is still much different. The most obvious is that although the body is the same from aluminum, but the HP Envy 15 does not like apples overall shape (a block of aluminum carved).

Even if not able to use this new technology, the HP Envy 15, working in the design, there are some bright spots. The superstructure is silver aluminum cover, the keyboard and wrist rest is Akiba-style tan. Cover and wrist rest on the use of more state-of-the-art laser etching technology, it looks like points of light blinking dreamlike. This is a clever gimmick, but also allow HP to something somewhat unique to boast.

More substantive difference is the absence of optical drives, the HP Envy 15 the thickness of only 26.5mm, weight 2.35 kg. This helps to maintain a compact and lightweight form factor, but also to give up something.

Overall, purely from the aesthetic point of view, Hewlett-Packard the Envy 15 degrees between imitation and innovation to grasp quite good. The design highlights is obvious, HP try to make this the Envy 15 seems to have a different feeling – it even can also be clearly reflected in the packaging.

HP Envy 15 has a powerful configuration. The first processor, quad-core Intel Core i7 – 720QM, clocked at 1.6GHz, seems somewhat low, in fact, a misunderstanding. It can disable the idle core, and the power transferred to the other working the core 720QM the main frequency up to 2.8GHz, which is Intel’s “regular overclocking technology (Turbo Boost).

With While high-end chip with 4GB of DDR3 memory, 64-bit Windows 7 Home Edition. A 320GB high-speed 7200 RPM hard drive can also add a high SSD. The graphics card is ATI Mobility Radeon 4 830 alone significantly, memory 1GB, HP Envy 15 can ignore most of the graphics applications.

Although this Novatech machine in the PCMark Vantage test, won the first, but thanks to powerful graphics performance, the HP Envy 15 also received a 6000 + score in the second row we have been measuring machine. This makes the HP Envy 15 can be at ease even in high strength multi-core tasks like video editing.

keyboard design

The configuration of the U.S. version of the HP Envy 15 Full HD widescreen, while the English version insisted on the use obvious bad custom 1366 x 768 resolution. This resolution in the game may be a little, not too serious drain on resources; However, we also found that the HP Envy 15 this LCD screen poorly, cheaper than the 500 to 700 pounds less than the laptop. Viewing angle is very small, color is not distinctive, gray transition is not obvious, only be regarded as slightly better – all of which makes this high-priced notebook computers disappointing.

The interface, the HP the Envy 15 also made some compromises, but has no display so serious. There are three USB ports (one USB / eSATA combo), HDMI interface, an Ethernet port and card reader (in front). Headphone and microphone jack is incorporated into an audio jack.

HP Envy 15 is a useful feature, three USB port has shut down charging functions, so you can give your cell phone, MP3, charging, or pop-up an external optical drive, even when shut down in a notebook. This is a sensible place in the HP Envy 15 design, but we estimate that the lack of IEEE 1394 port is a major drawback in the face of competitors.

But the real drawback is the Envy 15 HP keyboard and touchpad. For users of a computer entry, the keyboard is not backlit, the first condition they choose these high-end notebook. More irritating is that the HP Envy 15 shortcut keys even in the design of the keyboard’s left column, completely close together. These common shortcut keys and keyboard keys, and not significantly different, do not pay attention to see a fundamental distinction does not come out.

Battery life in HP Envy 15 ENVY. The IOS or a certain application space. MobileMark’s Productivity test, HP  Envy 15 battery only lasted two hours and 25 minutes, the DVD playback test is even more only a short 81 minutes. However, for a powerful laptop computer that is configured, it still is able to accept the results do not have to worry about the battery runs out, because you do not take it out a long journey.

HP has a solution, you can install a battery in the bottom of the notebook chassis, so you can extend the battery life time. Unfortunately, this is an additional optional configuration, priced at $ 125 HP official website, but including Hewlett-Packard UK, we have not seen where to sell. HP said that when this extra battery to work with the machine originally attached to the six-cell battery, the hp laptop battery life can reach seven hours. This is of course a very nice feature, but also makes it inevitable that HP the Envy 15 to increase the size and weight.

Products review: http://www.sales-battery.com/articles/HP-Envy-15-Review.htm

N46, N56, N76, respectively, 14 inches, 15 inches and 17 inches in size, 15 inches or more products can choose high-resolution screen. Asus this matte screen, can effectively reduce the problems of the other hand.

Motherboard main chip upgrade, native support for more USB3.0 interface, This is the body of a 6 Series USB3.0 interface, a considerable number. But we do not have to worry about for USB 2.0 devices, because these interfaces are backward compatible.

6 series quite a lot of very interesting design, for example, it allows the keyboard keys below the edge of the fuselage (to avoid screen cover, hit the keyboard), but also looks like a whole slice of. The same time, the keyboard surface with a laser engraved fourteen thousand different shades of make sonic imagery, the speaker itself is hidden in this little bit behind.

The N series of audio and high-quality sound unit is the main selling point of this system. This time N-series speakers are equally good in a lot of volume when good sound quality. Has a strong bass, the volume is large the whole machine are obviously in shock. Asus says they do a lot of design to ensure that the vibration does not affect the operation of the fuselage, for example, there are 60 under the keyboard screws, the speaker part of the connection body with rubber pads shock absorbers.

N series will be equipped with Ivy Bridge processor, built-in NVIDIA GT630M / GT650M independent display chip can be installed up to 8GB of memory, hard drives, SSD HDD, SSH, and other options, the N76 to even also can choose to double the HDD, the N series which the N56 is expected in May listing. The expected price is not yet available.

resource: http://www.laptopbatteryshop.ca/article.htm

DRAM only able to maintain the stored charge within a very short period of time, so it needs to be refreshed until the next write data or the computer loses power to stop its charge before it disappears. Each read and write operations can refresh the charge in the DRAM, the DRAM is designed to regularly read the contents of the DRAM. This has the following several advantages. First, just use the / RAS to activate each line can achieve the purpose of all refresh; Second, the Portable Solar Laptop Charger DRAM controller to control the refresh, which can prevent the refresh operation interfere with regular read and write operations. At the beginning of the article, I once said that in general the number of rows is less than the column data. Now I can tell why this is so, because the less time will be the line, the less the user refresh.

RAM modules based on:

In front of an article for the basic working principle of the DRAM and SRAM brief introduction, we have the examples cited are the most basic operating mode of the storage unit, so it should not difficult to understand, to see to many of my friends are interested in this things, I will continue to introduce some knowledge on the RAM (Random Access Memory). Understanding of this part of knowledge is the basis of the actual work of a better understanding, we introduce a variety of RAM.

SRAM or DRAM, a basic storage unit (on a description is used to store 1bit information storage units) can only store 0 or 1 data, but also on a 2 188 IDT6167 and Intel chip Only Din (data entry) and Dout will (data output interface), the Battery Grip for Canon BG-E8 CPU access to the data byte (8bit) to store the RAM to how to meet the requirements of the CPU?

First, in order to store one byte (8 bits) of information, 8 1bit RAM based storage unit stacked together, this also means that the 8 chips has been given the same address. The following diagram can help you compare the image of understanding to this point (shown in the legend drew only four storage unit, as a look at 8.)

Usually 8 1bit chips connected together through the address bus and data bus on the PCB (printed circuit board), the CPU, it is an 8bit RAM chips, rather than a separate 8-bit chip . Shown above address bus width is 22bit, so that the address bus beyond the control of the storage capacity of the module should be 222 = 4194304bit, and is a 4MB capacity; bit wide data bus is 8bit, that is, by the just mentioned 8-the 1bit the basic storage unit Dout parallel with – and can also meet the requirements of the Apple a1175 battery replacement CPU. (For this storage particles we call 4194304 x 8 module or 4Mx8 Note here the “M” is not “MByte” but “Mbit”). To illustrate, we use a TI (Texas Instruments Corporation) produced TM4100GAD8 SIMMs memory as an example to illustrate the structure of this memory is relatively simple and facilitate better understanding of. TM4100GAD8 4M x 8 module manufacturing capacity of 4MB, 30-pin SIMM package. If the things I said in front of you see that, you should know this memory using 4Mx1 DRAM. The following data I found on TI’s official website (currently there is little the company’s website also provide their own data): constructor: 4194304 × 8. :5-V operating voltage. 30 lines of SIMMs (Single In-Line Memory Module: SIMMs). 8 4Mbit DRAM memory chips, the plastic SOJs package. Long refresh period of 16 ms (1024 cycles).

TM4100GAD8 by 8 4096x1bit chip 5v voltage VCC and VSS for all chips. Each chip has a / RAS, / CAS, / W pin is connected with the corresponding memory of the pin. Each chip has a different data output / output interface. So we should be able to know the RAM is how to meet the needs of the HP HSTNN-IB0X Battery pack CPU to access the data.

About the Bank of

In front of us about are 8bit memory, and now this kind of thing we are basically out of the reach, the more commonly used 32bit, 64bit or 128bit. We’ve already talked about module 4Mx1bit bit input and output method, so it is easy to think we have enough chips on a module can be. However, in practical applications, only do so or not, and need to introduce the concept of the bank, the bank is composed of multiple modules.

Constitute a module is 4194304 x 1 chip, the architecture of each module should be 4194304×8 (4MB), so that four modules can be a bit wide for 32bit bank, capacity is 16MB. When the stored Portable Cellphone Jammer data, the first module of the storage bytes 1, 2, the third module of the second module storage bytes stored byte 3, the fourth module stores byte 4, the fifth module storage bytes 5 … … so the cycle to reach the maximum capacity of memory that can be achieved.

The article read here, we should be able to know when we use this type of memory, two ways to increase the memory capacity of this type. The first is by increasing the capacity of each individual module to increase the capacity of the bank, another way is to increase the number of the bank. So if this type of Waterproof Monitor TV memory upgrade to 32MB, can enhance the capacity of each module from 4MB to 8MB or increase the number of the bank.

The front of this 30 line SIMM for example is generally used in the 486-level computer, the memory used by the Pentium-level computer with this. Until now, my article did not address the memory used, but do not worry, I believe to fully understand what I am talking about things will help you understand the contents. Can tell you is the main difference between the Battery for HP Compaq NX6105 Pentium-level memory, and 486 system memory is the RAM chips.

Memory after the development of the EDO, SDRAM, and has now entered the era of the DDR. The following mainstream DDR memory to describe the physical structure of the memory.

1, PCB board
NP-FH70 Battery Memory PCB board most of them green. Today’s circuit board design is very precise, have adopted the multi-layer design, such as 4 or 6 layer PCB board is actually layered, its internal metal wiring. 6-layer PCB theoretically better than the electrical performance of the 4-layer PCB board, performance is more stable, so the brand-name memory use of the 6-layer PCB board manufacturing. PCB board to create tight, so difficult to differentiate from the naked eye on the PCB 4 layers or 6 layers, only with some of the printed symbol or logo on the PCB to conclude. In addition, and the PCB is closely linked to the term encapsulates. The figure is Infineon original 256MB DDR266, single-sided 8 particles TSOP package.

2, Goldfinger
Stud yellow point of contact is the contact part of the memory and motherboard memory slot, the data is to rely on them to transfer, often referred to as Goldfinger. Goldfinger is a copper wire, using a long time may have an oxidation phenomenon will affect the normal working of memory, prone to fail to boot failure, so can every other year or so to use the eraser to clean up the golden finger on the oxide.

3, the memory chip
The memory chip is the memory of the soul, EOS 600D Battery Grip memory performance, speed, capacity of memory chips. Today, our market there are many types of memory are not many models of memory particles, HY, KINGMAX, WINBOND, TOSHIBA, the SEC, MT, Apacer, etc.. There are many different memory particles of different vendors on the speed, performance. Electricity + brain * dimension + repair – to know. Know _ for (w_ww * dnw_xzs * co_m). Use the original chip of Infineon, Infineon, the original and -75 DRAM chip, so use the default 143MHz the -7 chip, for the user to set aside a certain amount of headroom for overclocking.

4, memory particles vacancy
Memory, you may often see such a vacancy, this is because the encapsulation mode set aside a memory chip memory to use this package model for other This memory is to use a 9 installed PCB, reserved for the location of the ECC modules.

5, capacitors
Electronic components essential to the PCB capacitors and resistors, which is to improve the electrical performance of need. Capacitors chip capacitors, because the memory is smaller, it is impossible to use the vertical capacitor, but this chip capacitor Solar Charger for Laptop performance is not bad, it is to improve the stability of the memory play a significant role.

6, the resistance
The resistance of the chip design, the general distribution planning is also very neat and reasonably good memory resistor.

Fixed memory card gap: memory into the motherboard, the memory slots on the motherboard there will be two clips firmly hold back the memory, this gap is used for fixed memory.

8, the memory foot gap
Memory feet gap first, to prevent memory inserted anti-(only one side), the second HP laptop battery is used to distinguish between the different memory of SDRAM memory is two gaps, while the DDR is only one gap, can not be mixed interpolation.

9, SPD
SPD is a small chip of an eight-foot, it is actually an EEPROM flash memory, this capacity is 256 bytes, you can write a little information, this information can include the standard state of the memory speed. response time in order to coordinate the computer system work better. PC100 era, the PC100 criteria stipulated in the PC100 standard memory modules must be installed on the SPD, and the motherboard can also be read from the SPD memory information, press the SPD’s provisions to make the memory to get the best work environment. General memory chip mark, usually including the inner ear of the trade name, capacity of single-chip, chip type, the pace of work, date of manufacture, which also may have a voltage, capacity factor, and some vendor specific logo on the inside. Chip logo is an important basis for the Aspire 5735Z Battery observed memory performance parameters.

Types of memory

There are three kinds of memory in today’s memory market, they are: SDRAM (Synchronous Dynamic RAM), DDR-SDRAM (Double Data Rate SDRAM) and RDRAM (RAMBUS the Dynamic RAM). This article will discuss in detail the memory of these three, pay attention to current market mainstream memory DDR-SDRAM has been further divided into several versions (such as DDR-II or GDDR3), here is a unified DDR-SDRAM features.

SDRAM (synchronous dynamic random access memory)

BlackBox 500S Receiver SDRAM is an improved version of the early memory-EDO (Extended Data Output) DRAM memory. EDO common at the top of the 486 or old Pentium system, its main drawback is that the memory frequency and system frequency is inconsistent (not synchronized), random delay and wait state (processor waiting for memory transmission available data), so the overall system performance enormous impact. SDRAM initial frequency of 66MHz, and the system frequency. Synchronization of the benefits are clear, can eliminate unnecessary waiting time, try to ensure that the system is stable and high-speed run. In addition SDRAM can also be completed within one clock cycle data storage request and retrieval operations, and to the next clock cycle, to prepare a good data transmission and reception.

For example, early Pentium II or Celeron, their FSB 66MHz Apple laptop battery, that is to run 6.66 10 million cycles per second, the running time of each cycle is 15 ns. In theory the SDRAM read operation in each cycle and a write operation, of course, this is only theoretical conclusions.

In fact Generally SDRAM memory chip does not than older DRMA type much faster, usually in terms of SDRAM requires multiple clock cycles to be able to correct positioning of the transverse and longitudinal address in order to begin to read and write operations, which generally takes five cycles . But when the first unit after the correct positioning of the adjacent memory cell will be concurrent execution read / write operations faster and faster, until the extent of an operation performed to achieve a cycle. This is called BG-E5 Battery Grip burst mode.