I ran prime for 24 hours to test stability and it was good until I started gaming (failed at 2560K FFT length). Once I starting gaming I got errors. I tested this again today and it wasn't until I started gaming that errors occured. Memtest86 was fine for 10 hours last week and 8 hours last night. Am I not giving memtest enough time? I also noticed in the Windows Task Manager that half of my physical memory is in use and half is being cached.
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