GPU power not reaching 100% intermittently on each boot

[ShaoBoon]

I noticed this issue when I was getting huge difference in FPS with the same game(Witcher3) and settings. It could run at 140+ FPS, but some time, it is just running at 60+. 

I started testing and found out that, by just doing reboot and start the game at the same scene, it could either run at 140 or 60 FPS.

 

After further investigation with HWInfo, I have captured some of the key metrics:

• When it run at 60FPS:
  • total gpu power [% of TDP] == ~75%
  • performance limit - reliability voltage == yes
  • performance limit - power == no
  • gpu power == ~275
• When it run at 140FPS:
  • total gpu power [% of TDP] == ~90%
  • performance limit - reliability voltage == no
  • performance limit - power == yes
  • gpu power == ~340

 

Any idea what might be the issue here?

 

system spec:

• CPU: Intel I7 10700

• mobo: Z490 Aorus Elite

• RAM: gskill sniper x ddr4-3200 8GB x2

• PSU: CM v750 gold v2

• M.2 SSD: intel SSD7 2TB

• GPU: GIGABYTE GeForce RTX 3080 GAMING OC 10G

[OddOod]

You need more power! (lightning bolt crackles)
A 3080 is gonna struggle a bit on 750W. Not so much that you're boned, but def gonna be power limited. 850 should be fine though

[ShaoBoon]

it never happen before, but I guess my PSU degraded, maybe thats why it is only happening now.

Aight, will try with higher Watt PSU, thanks.