i'm using i7 950 cpu and i saw in the intel site on Memory Specifications that my cpu can use only DDR3-800/1066 what that mean?
It's a waste of money for me to upgrade to ram of 1600(12800) mhz?
You can ignore Intel's comment on that. Check out your motherboard's specifications regarding what is recommended.
Regarding speed, if you overclock your CPU now, or plan to some time in the future, then 1600 MHz works pretty well.
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