[sleepycatgirl]

I can see 3 possible things there 1) Nvidia being Nvidia If both PCs have Nvidia... Back when I had Nvidia, I had exactly same problem. Random freezes, no matter which distro/kernel, sometimes needed reset. 2) RAM issue As much as its unlikely on both machines, testing RAM doesn't hurt 3) Hard drive degradation Similar results as in 1), but buying new disk solved the issue.

[pndy]

One machines has mentioned Nvidia GPU, the second is ATI, RAM is also different on both machines and tested already. The issue occurs on both SSDs and HDDs.