Hi
Can I ask??? You mention this RAM Patriot 3 x 2GB 1600Mhz now are you saying you have 3 off sticks of 2GB RAM, yes? Though you only mention installing in two slots (note - white as advised by DM not blue as you first mentioned), now sorry if I have misunderstood or missed anything in the reading but this board AFAIK (I have it but it is all still boxed ~ am wondering just when I will have time to do do my build, SWMBO has just reminded me this evening of all the things still to do before Xmas!!!!) accepts matched pairs of DDR3 RAM.
Your mention of Patriot 3 x 2GB makes me think you have 3 sticks of RAM such a set if intended for an X58 chipset motherboard though I think you could install 2 of them in this P55 board, DM is that right or will he need totally different RAM if I have 'read' the problem correctly???
Edit - though why the heck an ATI works and nVidea does not if my surmise is right is, to me, a complete mystery???
Just my 2p's worth of thoughts on the problem???
HTH maybe