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Power limit = Death?

SageOfSpice
By SageOfSpice
in Graphics Cards
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1 minute ago, SageOfSpice said:

How far is it safe to crank the Power Limit on a GPU? I've pushed it up to 50% already, how much further could I go?

All the way

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6 minutes ago, SageOfSpice said:

Even though I'm ignoring the software limitations? Default is something like 20%. I've found a way to increase it pretty much indefinitely though.

Power limit is just that... A limit. it does not force the gpu to run at what ever you set it at. Cranking it up to like 150% is just removing that artificial limit.

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Posted

The higher you set it, the more power the card is allowed to draw. It might still not draw that much, that depends on the other settings and what software you run.

 

Anyway, drawing more power can be fine or not fine depending on circumstances. If your power supply is strong enough, then all you really have to worry about is the heat that all this power turns into. And if your cooler is keeping the GPU and the VRMs on the card reasonably cool, then that's fine as well.

 

Just make sure you monitor temperatures and stress test in a few different demanding tests and games, to make sure you've found the highest temperatures the card will reach (also bear in mind it'll get hotter if your room temperature gets higher).

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1 hour ago, SageOfSpice said:

Hmm. Well, I've got it up a bit. It seems to be thermal throttling as soon as it gets to about 72c. I re-pasted it and tried again, same thing. It runs perfectly fine up until that point. 72c seems pretty low for a GPU to throttle, though.

 

Did you increase the temperature limit at the same time as the power limit?

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3 hours ago, done12many2 said:

 

Did you increase the temperature limit at the same time as the power limit?

Nah, I don't have a thingy for that. I'm thinking something is seriously wrong though. Dunno if it's the VRMs overheating or something, but this thing is just unstable.

 

I wanted to test where it would throttle without an OC out of curiosity because I'd seen the temps rise to 75c before without issue on stock clocks. So, I manually reduce and a set a static fan speed. It'd gotten up to about 82c before my computer just outright froze.

 

Such a weird issue, the fact that it's related to temperature in some way is just throwing me off. The odd thing is though, that if I set a custom fan profile and I keep the GPU under 70c, it keeps trucking no problem. The second it passes 72c, it cuts back the core clock for a second, the temps drop by 3c, and then it goes right back up and does it again.

 

I don't know, maybe I'll try another driver.

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9 minutes ago, SageOfSpice said:

Nah, I don't have a thingy for that. I'm thinking something is seriously wrong though. Dunno if it's the VRMs overheating or something, but this thing is just unstable.

 

I wanted to test where it would throttle without an OC out of curiosity because I'd seen the temps rise to 75c before without issue on stock clocks. So, I manually reduce and a set a static fan speed. It'd gotten up to about 82c before my computer just outright froze.

 

Such a weird issue, the fact that it's related to temperature in some way is just throwing me off. The odd thing is though, that if I set a custom fan profile and I keep the GPU under 70c, it keeps trucking no problem. The second it passes 72c, it cuts back the core clock for a second, the temps drop by 3c, and then it goes right back up and does it again.

 

I don't know, maybe I'll try another driver.

 

I wish I could help you more on fan curves and air cooling with the card in general, but I'm no expert in that area.  What card do you have?

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