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DDR2 memories are already supported on high-end motherboards. We compiled below a short list with the main differences between DDR2 and DDR memories. * DDR memories are officially found in 266 MHz, 333 MHz and 400 MHz versions, while DDR2 memories are found in 400 MHz, 533 MHz, 667 MHz and 800 MHz versions. Both types transfer two data per clock cycle. Because of that the listed clocks are nominal clocks, not real ones. To get the real clock divide the nominal clock by two. For example, DDR2-667 memory works in fact at 333 MHz. * DDR2 memories have a lower power consumption compared to DDR memories. * DDR memories are fed with 2.5 V while DDR2 memories are fed with 1.8 V. * On DDR memories the resistive termination necessary for making the memory work is located on the motherboard, while on DDR2 memories this circuit is located inside the memory chip. This is one of the reasons why it is not possible to install DDR2 memories on DDR sockets and vice-versa. * DDR modu

Dual Channel Memory can help improve the RAM speed, because this technique doubles it. In order to use Dual Channel Memory, your motherboard has to be capable of supporting this technique and you will also need two equal memory modules. We'll explain this further, but first let's understand deeper the bottleneck problem. Understanding RAM Timings DDR and DDR2 memories follow the DDRxxx/PCyyyy classification. The first number, xxx, indicates the maximum clock speed that the memory chips support. For instance, DDR400 memories work at 400 MHz at the most, and DDR2-667 can work up to 667 MHz. It is important to notice that this is not the real clock speed of the memory: the real clock of the DDR and DDR2 memories is half the labeled clock speed. This way, in fact, DDR400 memories work at 200 MHz and DDR2-667 memories work at 333 MHz. The second number indicates the maximum transfer rate that the memory reaches, in MB/s. DDR400 memories transfer data at 3,200 MB/s at the most, hence

Nhớ cái ni: Tốc độ của CPU được tính bằng công thức : Tốc độ CPU = Hệ Số Nhân(ratio) x bus hệ thống(FSB) VD: P3-500Mhz có HSN là 5, FSB là 100Mhz Như vậy để cho một CPU chạy nhanh hơn thiết kế ban đầu bạn chỉ “đơn giản” tăng HSN hoặc tăng FSB hoặc có thế tăng cả 2 nếu được. VD: P3-500Mhz chạy ở FSB 130Mhz bạn sẽ có con CPU P3-650Mhz mà ko tốn thêm một đồng xu nào hết ! chú ý: việc overclock sẽ làm hệ thống bị nóng lên nên phải ưu tiên giải nhiệt cho hệ thống là hàng đầu. thêm nữa cần phải tăng từ từ và kiểm tra độ ổn định của hệ thống sau đó mới tăng tiếp lên những mức cao hơn.