Originally Posted by steelodon
I have the setup in a Coolermaster Elite 300 case. The issue started occurring recently. The previous RAM was Crucial Ballistix Tracer 2 x 1GB and Patriot 2 x 1GB 6400 DDR2.
I take this to mean you recently upgraded the memory? Does it still do this with the old memory modules installed?
Are you by any chance overclocking? Also, what are the specific Corsair part numbers for the memory you are now running?
Were it me, I'd try to run an extended MEMTEST86+ session on each module, one at a time. Also, check the module voltages and timings in the BIOS to ensure that they are being detected properly. Another thing to check is to see if you had a recent video card driver update. If so, try to remove the driver and reinstall it. If this doesn't work, roll back the driver to a prior release in case there is a bug in the current driver affecting your system.