400W Power Spike on RTX 2070s 8-pin Connector

[Yukki]

My Gainward Phoenix RTX 2070 Super just started randomly getting power spikes for up to 400-500 Watts on the 8-pin power input out of the blue (reported by GPU-Z) when running games or any performance demanding tasks. No problems on the 6-pin. At first I thought it was thermals since the GPU Clock would get stuck on 300 MHz and the card was getting toasty, so I repasted it and replaced thermal pads twice. Now it's ~30°C / ~40°C hotspot on idle, gets up to ~80°C while running.

After swapping my 750W PSU cables and the PSU entirely with another model, the random power spikes issue persists. Even reinstalled the drivers with DDU twice just in case. Reducing the % Power Maximum in the Nvidia app does not help either. How screwed am I? Is it worth sending the GPU for repairs?

 

[Macro Device]

Is it worth sending the GPU for repairs?

Diagnostics, sure. Almost sure it's a faulty sensor rather than an actual overcurrent/overvoltage issue.

 

[Yukki]

Diagnostics, sure. Almost sure it's a faulty sensor rather than an actual overcurrent/overvoltage issue.

I should've clarified, my GPU still locks down to 300 MHz after 5-10 minutes of playing and the PerfCap reason mentioned in GPU-Z is Power.

 

[Macro Device]

This is completely insane. Take it to a technician, let them diagnose the card.

 

[pavle]

From that GPU-Z screenshot I see the card is not getting toasty at 300MHz. Looks like a classic shunt failure (it became more conductive, hence the higher power reading). Have it repaired if you can find any appropriate place.