If i have a 256 ddr 2700, can I add a 512 ddr 3200? what will happen?
It is somewhat unpredictable actually. That's one of the tricky things about putting computers together is that everymotherboard reacts to ram differently.
Best case scenario is that your motherboard will accept that you have 768Mb of ram, but downclock that new 3200 to match your slowest stick, 2700.
Worst case scenario is that your motherboard won't know how to use those two different sticks of ram at the same time and it a) will not boot up at all or B) will be prone to random crashes.
thanks a lot that really helped