Hello! I have this problem for a long time...pc freezes after a while in standby, blame on cpu, but saw that when I do a memory test in passmark, (the last "threaded memory') seems to freeze the system if it's done few times in a row but even first or second time). My specks are: Arsock 970 Extreme 3 rev.2 Mb, Amd Fx 8350 at stock speed, 4X4Gb@1600 Mhz Kingston memory, 750W psu, gigabyte gtx 1060 6gb Gpu. I tried a lot's of things, same freezing problem that requires only shut down from the power button (the reset doesnt make sistem boot again, black screen). In event viewer appears the Critical Kernel power 41, task category 63. Thank you for helping!