This is the best way of marking regions of RAM as bad in Windows: https://github.com/prsyahmi/BadMemory https://github.com/prsyahmi/BadMemory I've used it for

This is the best way of marking regions of RAM as bad in Windows: https://github.com/prsyahmi/BadMemory https://github.com/prsyahmi/BadMemory I've used it for many years. It only fixes physical hardware faults, not timing errors. For example if a RAM cell is damaged by radiation, not if you're overclocking your RAM.