I've been noticing errors when running some applications, mostly MMO games where I see semi-fatal frame stuttering. I have a new video card that is appropriately powered, so my main thought was either the hard drives (2 of 3 hard drives used for virtual memory at a modest 2 GB per harddrive) or the RAM is starting to "die". I got the software "BurnInTest" (v7) from Cnet and it confirmed that the RAM was the problem, using a 100% load full system (all components in use) test. In only 10 cycles of testing, the RAM had 5 errors, but no other components had issues. I did the simplest fix, and re-seated the RAM, after switching slots (2 x 1GB sticks). I then re-ran the RAM test alone, and it took to about 75 cycles of testing to accumulate 2 errors. Is that acceptable? Since the RAM was slightly overclocked, I was thinking about turning the voltage down and re-testing. But I'm curious what is acceptable for the purpose of non-critical applications.