Some questions about memory, experts come in to talk about

Users questions: Is the transmission type of memory ... I looked online, there are DDR.DDR2.DDR3 ... etc ... and, for example, is divided DDR2 DDR2400 .. DDR2667 .. DDR2800 .. so ... DDR2 is the class of all Type is common, is that if my computer already has a DDR2667's. Can no longer add a DDR2400 or DDR2800 the trouble you put it ... in detail, because I do not know if I add a computer ... DDR2667 (both are 1 G) and the only one DDR2667 (2G) that were better? There DDR2 667 and 800 that good?
Experts answer: memory, it is prone to incompatibility, under normal circumstances, add memory, will buy the same brand, same frequency, with the memory chip particles. If Your computer already has a DDR667, coupled with a DDR400, and it is certainly not enough, add section 800, if compatible, then the 800 will automatically reduce the frequency to 667. So if you want to add memory, I suggest to buy the same brand, same frequency, the same memory chip particles, This little better compatibility, the system will stabilize.
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