Last night I shut my computer down, walked away for like two minutes, pressed the power button and the lights came on for a second and it shut down, tried to start again, shut down again, etc. etc. No motherboard settings were changed; it has been running fine for nearly a year. It turns out that it's fine with one memory stick in it, but with both it will no longer boot. I tried the other two slots with the same result. Both sticks work fine by themselves. Also, when it did boot with one stick the CMOS had been cleared. I get the same result with and without XMP enabled, and with or without the CPU overclocked. I haven't tried them next to each other because I don't see any point in running the memory single-channel, but if you think it will help I can go ahead and try that (and hope the CMOS doesn't get cleared again). Any suggestions on how to troubleshoot this without a spare set of memory? Should I just get a new board (the receipt for this one is lost so no warranty)? I sure hope it's not the CPU... Sorry for any lack of info - it's been a really long time since I've had to troubleshoot something like this. Thanks Specs: MSI Z270 KRAIT Gaming (A9 UEFI) i7-7700k, G.Skill 2x16GB 3200 CL14.