Question Benchmarking 4080 and seeing the Performance Limit Reason as VRel/GPU Voltage Limit Reached

[Hypnopaedia13]

Hello All,
I just bought a 4080 and saw something in benchmarking I don't understand. My friend let me use his 4070 TI (Suprim X) to see what I thought. When running at stock the 4070 ti in Furmark and monitoring in MSI Afterburner, GPU-Z, and GPU Shark, it showed the card was being limited by Power limits. That tracked.


I ended up buying a 4080 (Suprim) and was testing it today and when doing the same testing it immediately hits the Voltage Reliability/ Voltage Limit.
In googling, half the people say that it's a crappy PSU. But I watched the 12v rail in HWMonitor and that doesn't seem to be the case.
1. Why did the 4070 TI Suprim X hit a Pwr limit while the 4080 Suprim hit a Vrel limit?
2. Is this simply a question of the Suprim X being Factory OC'd and the Suprim not being Factory OC'd?
3. Is it normal for a 4080 stock to hit Voltage Reliability limits immediately?

Appreciate any insight you may be able to provide!

 

[Viking2121]

That show these cards work, Epically with something like Furmark, these card will throttle based on a allowed power limit set by nvidia or it board partners, and temp limit. You can raise the the power limit in MSI afterburner, not much but it will allow more power to the core and increase the clocks, you'd still hit a power limit with furmark and even most well optimized games, thats normal and thats what these cards are suppose to do, better to be power limited than temp limited.

Thats why a lot of people say to undervolt these newer cards, you can undervolt, to allow the cards to boot higher, gain a little more fps by just turning down voltage.

Nothing wrong with how its operating.

Good Luck

 

[Phaaze88]

I ended up buying a 4080 (Suprim) and was testing it today and when doing the same testing it immediately hits the Voltage Reliability/ Voltage Limit.
In googling, half the people say that it's a crappy PSU. But I watched the 12v rail in HWMonitor and that doesn't seem to be the case.
1. Why did the 4070 TI Suprim X hit a Pwr limit while the 4080 Suprim hit a Vrel limit?
2. Is this simply a question of the Suprim X being Factory OC'd and the Suprim not being Factory OC'd?
3. Is it normal for a 4080 stock to hit Voltage Reliability limits immediately?

1)First:
vRel = Reliability. Indicating perf is limited by reliability voltage. This one means the next 15mhz(or whatever that number is) on the boost curve is not stable on the core. Basically means the limit of the silicon has been reached.
VOp = Operating. Indicating perf is limited by max operating voltage. This one means that the voltage controller on the card has hit its limit.
Pwr = Power. Indicating perf is limited by total power limit.
Thrm = Thermal. Indicating perf is limited by temperature limit.
Util = Utilization. Indicating perf is limited by GPU utilization.
It is expected to see at least one of these when the gpu is in use. Thrm is the one you don't want to see by a long shot.

Second: I suppose the power limit on the 4070Ti Suprim X is a bit conservative.
4080: Silicon lottery. Imagine several tiers of overclocking bins. Your sample doesn't overclock as well as some others do. It's such a minor thing compared to the difference in performance between the xx70Ti and xx80 tiers.

2)No. It's expected for even the same models to have different bins between owners. It's not possible for everyone to have golden samples.

3)Sure.

 

[hotaru.hino]

Modern video cards are going to boost until it hits some limit. Vrel and Pwr are more or less fine, because the video card hit either the power limit or the highest voltage it will go to. It'll never hit VOp unless you modified the card and Thrm is a cooling issue.

So unless you're going for overclocking records or the card isn't performing to expectations, ignore the performance limit reasons.

 

[Hypnopaedia13]

Thank you everyone, I appreciate the clarification. Just trying to better understand the situation and now I do!!