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Question PC crash when going from 3d environment to 2d environment alt tab

Issue Games

Jul 26, 2015
So when ever I alt tab out of game to desktop my pc freezes and monitor goes to no signal mode, numlock and mouse doesnt work. Only way to fix is hard reseting pc or turning off PSU. I stress tested my GPU and CPU for 15mins and I didnt crash or anything temps were fine too 75degree but when i wanted to close furmark by hiting espace key to go to desktop boom! same thing PC goes black screen no signal.. I let Red dead redemption 2 run for 20mins and when I hit windows key to open chrome same thing happened!
my specs are
Gigabyte h310
i5 8400
RX 580 Sapphire Nitro+ 8GiB
Corsair Vengeance 16GiB DDR4
Coolermaster v1000 PSU Gold rated
windows 10
Oh and Im using an hdmi to vga adapter since I dont have a decent monitor atm
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