I bought this pc 11 months ago and all was fine up until 3 weeks ago when I noticed only 2GB of RAM was showing. Belarc Advisor showed Dimm0=2096mb, Dimm1=16mb. I swapped the sticks over on the mobo and Dimm0=16mb, Dimm1=2096mb. The pc POSTs and starts fine with the one good stick installed but fails to POST with just the faulty stick. Thinking I had a bad stick of RAM I ordered a new kit of 2x4GB instead of RMAing the originals. The new kit installed ok and showed 8Gb installed. Now this morning only 4GB is showing. This time Dimmo=4096, Dimm1=empty. I tried increasing the voltage to 1.56v and manually setting clock speed to 667mhz but still the same. I'm running Win7 64bit, not overclocked, BIOS flashed to latest edition, all settings an Auto. Please help.