Random black screen

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Joined
21 Aug 2016
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99
This has happened a few times now, for no apparent reason. The first couple of times the screen went black and there was buzzing from the speakers, this time there was no buzzing, the system is still running or atleast the fans are, but the screen is blank.

i5-6500 non overclocked, XFX R9-390 with the latest drivers, overclocked a little bit with Afterburner, Gigabyte Gaming K3, Windows 7, temps are fine, the computer is only a few months old, and it seems to happen at random times, not necessarily when under stress because twice it's happened when web browsing.

I looked this up on google and some people seem to think it's GPU related? Or possibly PSU?
 
This just happened again, black screen and buzzing sound, whilst playing AOE 2, so no stress on the CPU or GPU, as it's an old game and can run on almost any PC.

Anyone got any idea what the problem is or how to fix it?
 
1 stick of 8GB Corsair Vengeance DDR4 2600mhz

I get the usual message when restarting about not shutting down properly, and no I haven't ran memtest.
 
Downclocking seems like a step backwards, from what I've seen other people running on these cards it's well within it's limits, of course not all cards are the same but if that's the case then it may aswell go in the bin.

It just happened again, annoyingly half way through a game without saving. I can't pin point a certain time where it started happening, maybe a driver update or something.
 
This has started happening quite regularly now, hadn't happened for a while, but now happens atleast once a day, when doing something simple like web browsing, so no stress on any part of the system. Screen goes blank and audio carries on for a few seconds before it stops and there's a loud continuous buzzing.
 
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