I was having this same issue on a brand new build...
Quad Core i5-750
Geil DDR3 PC3-17000 4GB (2x2GB)
Asus P7P55D Mobo
Radeon HD 4870
After trying a multitude of things to fix it I finally solved it by manually setting my DRAM voltage to the Geil recommended 1.65v (for some reason the auto voltage was set at 1.8v) and my CAS timings to the Geil recommended 9-9-9-28.
I also read on another forum that it's best to do a clean install with only one DIMM in the socket and always flash the CMOS when reformatting once you have everything hooked up.
Just about finished installing Win 7 now...wish me luck..looks like I'm in the clear though.
Quad Core i5-750
Geil DDR3 PC3-17000 4GB (2x2GB)
Asus P7P55D Mobo
Radeon HD 4870
After trying a multitude of things to fix it I finally solved it by manually setting my DRAM voltage to the Geil recommended 1.65v (for some reason the auto voltage was set at 1.8v) and my CAS timings to the Geil recommended 9-9-9-28.
I also read on another forum that it's best to do a clean install with only one DIMM in the socket and always flash the CMOS when reformatting once you have everything hooked up.
Just about finished installing Win 7 now...wish me luck..looks like I'm in the clear though.