![]() PIN CONFIGURATIONS (Front side / back side) Note: Pin 196 is NC for 512MB, or A13 for 1GB and 2GB pin 54 is NC for 512MB and 1GB, or BA2 for 2GB. Practically, DDR3 RAM caps out at 8GB per stick, though some 16GB sticks are available. DDR2 SDRAM DIMM 240 pin DDR: Double Data Rate DIMM: Dual Inline Memory Module SDRAM: Synchronous Dynamic Random Access Memory, Synchronous to Positive Clock Edge. ![]() You can find sticks of DDR2 RAM that are 4GB, but the most common maximum is 2GB. Lower voltage means the RAM uses less power, thus putting less strain on the CPU. DDR2 RAM uses 1.8V, while DDR3 is lower at 1.5V. Voltage is another important aspect of RAM generations. While DDR2 RAM has data transfer rates ranging from 400 to 1,066MT/s, DDR3 smashes this at 800-2,133MT/s. This refers to the number of operations the RAM can complete every second 1MT/s is one million transfers per second. One way to measure RAM speed is megatransfers per second, or MT/s. When it comes to speed, DDR3 is unsurprisingly faster. DDR3 takes this even further, as it can produce eight transfers for every clock cycle. While original-generation DDR RAM ran two data transfers per clock cycle, DDR2 RAM can produce four transfers per cycle instead. While you're unlikely to find DDR2 RAM in many places today (it did become available back in 2004) it's still useful for comparison. Let's look at DDR2 and DDR3 RAM differences first. You might wonder how the newer generations of DDR RAM stack up. It's thus vital when building or upgrading a PC that you buy the right generation of RAM for compatibility.Įach generation of RAM has its notch in a slightly different position, so it's impossible to put the wrong type in your computer. If your motherboard is designed for DDR4 RAM, DDR3 RAM simply won't work in it. Importantly, RAM is not backwards or forwards-compatible. Without these advancements, we wouldn't be able to put RAM into newer systems. This is why we've seen DDR2, DDR3, and DDR4 RAM after the original generation. New generations of RAM are necessary to work with the latest chipsets. This is a set of electronic components that let all the parts of a computer communicate properly. As companies like Intel come out with new CPU technology, they require new motherboard chipsets. The generation of RAM used with a computer is closely tied to the development of processors and motherboards. But you might wonder where DDR2 and DDR3 came from, and why they emerged. A-Tech 4gb Pc2-6400 Laptop SODIMM Ddr2 800 MHz 200-pin Notebook Memory RAM 1x 4g (14) Total Ratings 14. A-Tech 2GB PC2-6400 Laptop SODIMM DDR2 800 MHz 200-Pin Notebook Memory RAM 1x 2G (86) 86 product ratings - A-Tech 2GB PC2-6400 Laptop SODIMM DDR2 800 MHz 200-Pin Notebook Memory RAM 1x 2G. This isn't out of the ordinary, since many computing standards evolve over time. Get the best deals on 4GB DDR2-800 Computer RAM and find everything youll need to improve your home office setup at . A-Tech 2GB 2 x 1GB PC2-6400 Desktop DDR2 800 MHz DIMM 240-Pin Non-ECC Memory RAM.
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