I am building a new PC:
Motherboard: GA-X58A-UD3R (rev. 1.0)
BIOS-Version: F5
Graphic: Zotac GeForce GTX 470 1280MB DDR5
CPU: Intel Core i7 930 @2800MHz (default)
OS: Win 7 64-bit
RAM: OCZ3G1333LV4G, 3 sticks of 4GB
PSU: Corsair HX850W 850W
SSD: OCZ Vertex 2 60GB
I am not overclocking, but I did have to manually set the RAM to 1333 and the timings to 9-9-9-20-1T according to the manufacturer.
The rest of the settings in the bios are default.
If I have all three RAM sticks in slots 1,3, 5, I can run Memtest86 overnight without errors.
However, when I boot windows 7 64bit and run Prime95, I get an error almost right away: "FATAL ERROR: Rounding was 0.5, expected less than 0.4" on multiple threads.
I have tried tweaking the RAM voltages and timings, but I always get this error.
Or I can only get LinX test to run for 5 to 10 minutes before getting an error.
If I install one RAM stick at a time in slot 1, I can run either Prime95 or LinX without any problems. I get no errors with any of the 3 sticks installed by themselves in slot-1.
So, I am pretty sure it's not the RAM or the timings since everything works with one stick.
Do I have a defective motherboard? Can you think of any other reason why I would be getting errors?
Thanks in advance for your help.
-Darin