Computer restarts in 3 seconds but stays on with video cable removed. PSU?

[wimafrank]

Sorry I don't know if the same question has been asked/answered before. I searched but could not find a similar situation.

When I run FurMark, the computer restarts in a few seconds with the HDMI cable connected. If I remove the cable, the computer stays on. Is that a PSU issue or the cable/monitor?

Thanks a lot in advance.

Frank

[JeGX]

Looks like a PSU issue. What is your GPU model? And your PSU model?

[wimafrank]

Thanks a lot JeGX,

GPU:
ASUS Dual GeForce RTX 2080 Ti DirectX 12 DUAL-RTX2080TI-O11G 11GB 352-Bit GDDR6 PCI Express 3.0 HDCP Ready SLI Support Video Card

PSU:
NEW 800W 800 850 Watt 850W LED Large Quiet Fan ATX Power Supply SATA 12V PCI-E PSU by COOLFANS

Frank

[JeGX]

Never heard about coolfans brand.
A RTX 2080 Ti can draw a lot of power when FurMark is running and your PSU seems a bit suspect for me.
Do you have the possibility to test with a stronger PSU like a Corsair or a Seasonic one?

[wimafrank]

Followed your advice and tried a different 450W PSU, and the FurMark finished run without issues. So the previous PSU is not powerful enough. Thank you so much JeGX!