It could be an mobo bios/firmware issue...you could try updating bios to see if it does anything....because it's not supposed to be this way...as you guys say it used to work okay...what if your north bridge/south bridge are freaking out...from too much stress...try clearing the CMOS then running everything at recommended/stock settings and test the stability with all the programs (prime 95, memtest, linx, 3DMark)
And go from there....if stable try overclocking a grain and so on...Idk what the problem is so just had some suggestions...hope you guys can get your systems up and running...
And go from there....if stable try overclocking a grain and so on...Idk what the problem is so just had some suggestions...hope you guys can get your systems up and running...