Question Monitors Shutting Down When Stressing Graphics Card

May 25, 2020
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Hello, Everyone!

I have an issue with my monitors shutting down when stressing a bit the graphics card (usually 5 to 10 mins.), the PC stays on but I lose sound as well, almost as if it freezes. So, this started to happen when I added a 3rd monitor screen to the GPU ports (the GPU supports 2 HDMI´s, 2 DP´s and 1 VGI). Also, the keyboard LEDs start to flicker as if it struggled to get power.

*The only way to restore the monitors or PC is by manually shutting down the PC.

Power Supply Calculator says that based on my PC specs I need a 364 Watts Power Supply (I have a 600W).


I made some tests:

Tested the CPU cores for overheating (reached 80° as peak) during the higher test, also tested the GPU temp and it didn´t get beyond 74°. I also tried to remove almost all the power units from the outlet power bank except for the PC (maybe it didn't have enough power?). So I think it might be an issue either with the GPU or with the PC Power Supply...

PC Specs:

Motherboard: AORUS ATX H370 GAMING 3, S-1151, Intel H370, HDMI, 64GB DDR4

Processor: Intel Core i7-8700, S-1151, 3.20GHz, 6-Core, 12 MB Smart Cache (8th Generation Coffee Lake)

RAM Memory: 4x HyperX FURY Red DDR4, 2400MHz, 16GB, CL15

Video Card: Sapphire AMD Radeon RX 590 Nitro, 8GB 256-bit GDDR5, PCI Express 3.0

Hard Drive: Seagate Barracuda 3.5'', 2TB, SATA III, 6 Gbit/s, 7200RPM, 64MB Cache

Operating System: Windows 10, 64-bit Edition

Power Supply: Thermaltake 600W Smart 80 Plus White Atx

*Besides this, have the following stuff always connect to the PC:

1 Huion Kanvas Pro 16 inch Led Monitor Screen
1 Sharp 32" Plasma TV (old model)
1 23" Led Horizontal Monitor
1 USB Audio Interface: M-Audio Fastrack C400
1 Steinberg Lock (USB)
1 Led Keyboard
1 Mouse
1 Multi USB 3.0 hub which has its own power supply, this powers 4 Hard Drives, and 1 MIDI Keyboard
1 Ipad connected to the PC

I would appreciate any insight!

Thanks! :)
 
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May 25, 2020
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That's a poor quality psu and the RX 590 is not a very forgiving card. Likely that cheap psu can't handle the transient load of that gpu.
So, what would be an OK PSU or what would you think would be fine? (I know very little about all this, this is my first custom-built PC) :)
 
May 25, 2020
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A good quality 550w psu would do it, but personally I'd get atleast a 650w unit. Corsair TXm, RM, RMx, Evga G2 or G3, Superflower Leadex series, Seasonic Focus or Prime series.
Thanks so much for the insight!

Would you consider the Corsair CX750M 80 PLUS Bronze, ATX, 120mm, 750W or EVGA 650 GQ 80 PLUS Gold, ATX, 135mm, 650W an OK choice?
 
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