我要买内存，这两个钱差不多，但是就是SPD不一样，选哪个呢？
Corsair XMS2 TWIN2X2048-6400C4 2GB 2X1024 PC6400 DDR2-800 CL 4-4-4-12 240PIN Dual Channel Memory Kit ？？
Corsair XMS2 TWIN2X2048-6400 2GB 2X1024 PC6400 DDR2-800 CL 5-5-5-12 240PIN DIMM Dual Channel Memory ？？
谢谢
[ 编辑 zzmichael 在 06-06-13 12:27 ]
理論上說好象444快些
越小越好…Clock…
时钟频率?小点好吧?
参数分别是：
CL: CAS Latency. The time it takes between a command having been sent to the memory and when it begins to reply to it. It is the time it takes between the processor asking for some data from the memory and it returning it.
tRCD: RAS to CAS Delay. The time it takes between the activation of the line (RAS) and the column (CAS) where the data are stored in the matrix.
tRP: RAS Precharge. The time it takes between disabling the access to a line of data and the begin of the access the another line of data.
tRAS: Active to Precharge Delay. How long the memory has to wait until the next access to the memory can be initiated.
CMD: Command Rate. The time it takes between the memory chip having been activated and when the first command may be sent to the memory. Sometimes this value is not informed. It usually is T1 (1 clock cycle) or T2 (2 clock cycles).
越小越好
444… 
44412
444
当然是4-4-4-12了，延迟小。