This was 10+ years ago, but I had an issue with my motherboard not liking my RAM when in dual channel mode that memtest/memtest+ could not find, but Windows Mem

This was 10+ years ago, but I had an issue with my motherboard not liking my RAM when in dual channel mode that memtest/memtest+ could not find, but Windows Memory Diagnostic (advanced tests) did find. So it's worth running both if you are ever stumped.