with the calculator check to see what the actual power requirements are on your current system to see if 115 watts was actually enough
Is DIMM the Same thing as DDR SDRAM If it is i'm going to go with the 2nd board you said. I've got 2 512 Chips in mine now and i dont wanna buy new ones.
dimm stand for dual inline memory module so can be both sdram or ddr. ddr ram has 1 notch off center at the bottom whereas sdram has 2 notches so can't be reversed