Question Overclocking/power issue with 2080ti

themyst

Honorable
Apr 24, 2014
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Hi there! Long time lurker.

I have an EVGA 2080ti XC Ultra that I am trying to overclock in MSI Afterburner beyond what the "autoOC" determines. The issue is my system shuts down when I overclock beyond autoOC, which I suspect is a PSU issue, BUT I can't figure out why a Corsair 850HX (80 Platinum Rating) is insufficient for this.

The "autoOC" gave me a +120 core and I found +750 on Memory Clock to be stable over 4+ hours of 4k gaming in Red Dead Redemption 2. In MSI Afterburner, power limit is 100% on this setup, no stability issues whatsoever.

When I bump the Power limit to 130% and crank the core to +131 and mem to 765, system shuts down. Need to cycle the PSU to bring it back to life.

Relevant system specs:
Ryzen 9 3900X set to "autoOC" in Ryzen Master
32GB DDR4-3200 RAM (16x2) XMP2.0 stock profile
EVGA 2080ti XC Ultra
Corsair 850HX Platinum

The PSU is a holdover from my old build which powered an i7-4770K / R9 290 OC combo and never encountered any such issues. is the 2080ti / 3900X combo more power hungry than my previous build? Both GPUs are rated for 250W TDP so even with an overclock I can't imagine why the 2080ti would be worse in that aspect.

Any help would be appreciated. Thanks!
 

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