gavinc Posted October 18, 2010 Share Posted October 18, 2010 i have 4 gb (2x2) of both CMX4GX3M2A1600C9 and CM3X2G1333C9 memory, i know the cm3x2g1333c9 is slower, but i figured they would be backwards compatible? I have a p45d3 platinum (MSI) board that supports 2gb/slot (8gb max) of ddr3 ram, all pieces of ram boot individually and both sets boot. but i cannot boot 1 of each or 2 sets (it doesn't even post) I tried manually setting the clock speed of the ram to match the slower ram, which boots with either ram, but again, not with both (or 1 of each) Are they just incompatible? or am i missing something? Link to comment Share on other sites More sharing options...
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