For overclockers, MemTest5 with Anta777 config is the best free tool available. For professionals, running both MemTest5 and an overnight MemTest86 session is the ultimate guarantee.

Relaunch the program as an administrator. The test will start automatically.

To get the most out of MemTest5, follow these best practices:

The application is extremely lightweight, often taking up less than 1MB of space. How to Use TestMem5