Monitor loses signal (no input detected) randomly when gaming

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Joined
2 Apr 2018
Posts
32
Hi,

When gaming, the monitor looses signal - screen shows no input. It happens randomly and I've monitored temperatures but nothing excessive is happening. The PC is still on (lights etc) but I have force shutdown with the power button.
There are no errors reported in the Event Viewer except that the PC was shutdown unexpectedly.

It started happening a couple of weeks ago and nothing in game dictates when it happens. I've tried a number of games and it happens in any intense game (fps, flight sims etc).

Yesterday, the PC completely died, showed no signs of life. I replaced the PSU today and after a couple attempts, it booted perfectly and anything except gaming works perfectly too.

The rx580 was always excessively hot and sounds stupid loud but I sorted extra case fans and now it idles at 24c and goes up to 72c max.
CPU idles at 39c.

I have cleaned CPU and GPU, added new paste, used different monitor cables and ports.

Drivers are all up to date and I tried rolling back to a previous Radeon driver with the same results.
It happens at 60hz and 75hz.
Memtest reports 0 errors.

I'm going insane!

Operating System: Windows 10 Home 64-bit (10.0, Build 18363) (18362.19h1_release.190318-1202)
Processor: AMD Ryzen 7 2700X Eight-Core Processor (16 CPUs), ~3.7GHz - stock cooler
Memory: 8192MB RAM
MSI AMD Radeon RX 580 8GB ARMOR 8G OC Graphics Card
Display Memory: 12233 MB
Dedicated Memory: 8171 MB
Shared Memory: 4061 MB
Current Mode: 1920 x 1080 (32 bit) (75Hz)
Monitor Model: Acer VG270
Motherboard: asrock fatal1ty b450 gaming-itx/ac
PSU (new) Corsair CX650
 
70-116fps in Battlefront 2
GPU util 100%
GPU Temp 78c
CPU util 40-80%
CPU temp 50c

GPU is hotter than I thought :/ These stats were 1 sec before the black screen just now. GPU overheat?
 
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