Could my PSU throttle my GPU?

[spranks]

Over the last couple of weeks my GPU has been "power throttling" and I'm starting to suspect my PSU is the culprit. While gaming after my PC has been turned on for a couple of hours my FPS in almost every game drop for a couple of seconds and then come back to normal. This seems to go away after I restart the PC but it has been more often since it begun. I disabled my CPU overclock and that seemed to work for a while, Temps are fin (GPU 77c max, CPU 50c max). I already tried different drivers and it doesn't work. I already tested my GPU on another PC and it works fine, I also testen my PC with another GPU (GTX1080) and it has the same issues. Both my GPU and CPU are running at stock speeds

System:
i7 5820k
GTX 1080ti FE
Asus X99 Deluxe U3.1
Corsair vengeance LED 16gb 2666mhz RAM
Corsair RM750 80+ Gold
Custom Waterloop (only cpu for now)

 

[lakimens]

Most likely not, that's a very good PSU and your build doesn't consume anywhere near 750W.
I don't actually know what might be causing this, so trying with a different PSU is a good idea.

 

[Sedivy]

Check both the power mode of your computer and in the nvidia control panel, of your video card. It could just be something in your settings.
Keep an eye on the task manager to make sure you don't actually have something running in the background that's taking processor time away from the games, that you just don't notice until you stress the system.
You could stress test your CPU with something like Prime95 and check your memory as well while you're at it (Memtest) though unlikely to be memory, it won't hurt to test.
Finally, check with your motherboard's manufacturer if there are newer versions of bios for your board, and if the updates they list sound like anything you could use (power management, vga compatibility etc.).

 

[spranks]

Most likely not, that's a very good PSU and your build doesn't consume anywhere near 750W.
I don't actually know what might be causing this, so trying with a different PSU is a good idea.

Any idea why could this be happening?

 

[spranks]

Check both the power mode of your computer and in the nvidia control panel, of your video card. It could just be something in your settings.
Keep an eye on the task manager to make sure you don't actually have something running in the background that's taking processor time away from the games, that you just don't notice until you stress the system.
You could stress test your CPU with something like Prime95 and check your memory as well while you're at it (Memtest) though unlikely to be memory, it won't hurt to test.
Finally, check with your motherboard's manufacturer if there are newer versions of bios for your board, and if the updates they list sound like anything you could use (power management, vga compatibility etc.).

I Will try all of these and get you back, thanks

 

[velocityg4]

A PSU does not throttle power. It does not send reduced power. If you overload a PSU. It overheats.

A good PSU has safety features that will cut all power when overloaded. A very poor quality PSU will continue to operate until it is destroyed. In either case it is all or nothing.

Think of it like a circuit breaker in your house. It will supply all power it cannot limit. It can only cut all power when overloaded.

Think of a cheap like someone removing a circuit breaker. The placing a piece of copper wire in its place. If the circuit is overloaded. It will keep supplying power until the circuit is destroyed.