Quote:
Originally Posted by r31ncarnat3d 
They're incompatible. DDR3 for S775 uses higher voltages than DDR3 for S1156/S1366/AM3. S775 DDR3 wouldn't function for those chipsets, and S1156etc. DDR3 would fry in S775 boards.
Besides, it's more than simply getting S1156. Changing sockets also means changing CPUs, which some people don't have the money for.
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its the same ddr3, just different manufacturer voltage specs. when they first came out they were spec'd to run at 1.8+ volts and then it was determined that Intel stated 1.65 volt on memory was standard, so memory manufacturers took the same 1600 1.8 volt and sold it as 1333 1.65 volt ram. Not exactly, but you get the general idea.
the bottom line I was getting at was the person looking at this 775 board would already have ddr2 ram (like the OP) or would be getting a whole new setup...
if they had to get ram and a new board, then it would be total waste to go 775. but that is another topic.