For overclockers, Prime95 has a feature called "Torture Test" that allows maximum stress testing on the CPU and RAM. There are several options allowing the stress test to focus on the memory, processor, or a balance of both. Usually Prime95 will detect an error within a matter of minutes if an overclock is not stable, however many people like to let the system "burn-in" overnight to ensure long-term stability.

Program Information Category: Tools and Utilities Type: Free Version: 25.9 Build 4 Size: 991KB Works on: Windows Product page: here