Undervolting RTX 3000 series.

[Grim5]

That's really low voltage.

I managed to get 2055mhz even on 1.035v. Though after a while it dropped to 2040mhz rock solid. 216 watts max.

not really, 825mv is low, 875mv is still up there

 

[Grim5]

Huh. That's weird - you'd think being binned silicon that there'd be some consistency (I supposed it depends on what they were binning for).

On my Suprim X 3090Ti I settled at 70% power limit, 0.925mV and +1050 on the VRAM - that gets me a 1% drop in performance vs. stock for a 130w reduction in power usage (core is 1995, peaks around 318w - only 18w more than my OC'ed 3070).

Thisnis why people shouldn't be worried about 600w RTx4090 rumours, users will probably be able to undervolt it down to 400w for just 5% performance loss

 

[g67575]

What the hell is Nvidia doing, allowing people to turn up the voltage of RTX 3080/3090s above 1.0v in the GeForce Experience software?

Isn't this setting yourself up to fail, given that GDDR6X is 'only' rated to operate with stability at upto 95c?

Do any Ampere cards operate at above 1.0v by default?

 

[Bill Turnip]

Call me a cynic, but is there an argument for letting some people drive the voltage too high and potentially damage a gpu just at the time the next gen cards are around the corner...

 

[FlyingFish]

What the hell is Nvidia doing, allowing people to turn up the voltage of RTX 3080/3090s above 1.0v in the GeForce Experience software?

Isn't this setting yourself up to fail, given that GDDR6X is 'only' rated to operate with stability at upto 95c?

Do any Ampere cards operate at above 1.0v by default?

Er, because it's totally normal.

My 3080, and now 3090 both operated at over 1.0v at default. Its totally normal.
Nvidia's own boost algorithm will use thermal headroom, power limits, and silicone quality to boost the frequency and voltage to obtain max performance while operating within a safe reliable limit, and adjust on the fly as operating conditions change. And that will vary card by card, as to what the specific numbers are. Some are better than others (silicone lottery) These numbers are always higher than the marketing figures, so every buyer is a happy buyer

Nvidia has a 3 year warranty. Why on earth would they risk frying the components by default. Micron GDDR6X spec sheet has the operating temp up to 105C, and max 125C. But that max will never be reached as the GPU will throttle way beforehand, to stop any damage. Plenty of 30 series cards run memory over 100C with no ill effect apart from the memory throttling to protect itself.

 

[g67575]

It's not worth clocking it higher. I only managed to boost the minimum FPS by 1-2 in games like Warhammer 3 and Watch Dogs: Legion, when clocking the GPU at ~1900mhz. Interestingly, overclocking the GDDR6X by 1000mhz didn't seem to grant any appreciable benefit to performance in these scenarios.

Micron only rated their VRAM for 95c initially. I think GDDR6 is only rated to run at 90c also.

Anyway, assuming the fans are good, you can keep the VRAM cool even at 1900mhz or higher (VRAM at 1.1v), if ran at 3000 RPM. So, it's a trade off between fan noise and a small performance gain.

It's interesting that you can run RTX 3080s at 1710mhz at just 0.825v, there's obviously a steep price for higher clock speeds.