MSI afterburner 'No Load' limit when undervolt RTX 5080

[K4Y84]

Hello,

So I have an RTX 5080 FE that when stock runs fine and the limiting factors in MSI AB as expected are power and/or voltage.

When I undervolt the card (no matter what I set in the curve), it always runs the voltage/frequency at one or more points below what I set and MSI AB shows the limiting factor as 'No Load'. It's like it is not boosting.

For example if I set something like 2800mhz @ .975v it runs 2700mhz at .950v. But then if I set 2900mhz @ 1v it runs 2800mhz at .975v.

Tried multiple 3D Mark tests, Heaven and Cyberpunk - same deal.

Any guides or videos do not show this same behaviour and I didn't have it in my RTX 3080 not does my friend have it in his RTX 4090.

No v-sync or screen caps are set on Nvidia control panel.

I've seen some mention of this on Reddit etc but no concrete information. Is MSI Afterburner just bugging out?

 

[Joxeon]

Have you got the latest AB?

 

[Rroff]

This is known/expected behaviour though I can't remember the reasons why off the top of my head, also GPUs run in voltage and frequency steps - usually something like 12MHz, 25mV though I don't know what they are for Blackwell off the top of my head - so setting a specific voltage or frequency might not have the results you expect.