MemTest86 7.4 Pro is here! – MemTest86 is a powerful memory stress test software programs, designed to check the functionality of Random Access Memory (RAM). MemTest86 Pro helps you diagnose and finding intermittent memory errors, it verifies that the RAM will accept and properly maintain the arbitrary patterns data is written to it, that there are no conflict between the memory address, and that there are no errors where different bits of memory interact.