Why do we GPUs have a max TDP?
- Thread starter Newabcd
- Start date
Chugalug_
Titan
- Jan 28, 2016
- 16,502
- 4
- 74,965
You can flash the BIOS to unlock this, but a TDP limit is put in place to ensure stuff like VRMs etc. don't burnout, as they would be held liable for example with an overclocking focused card.
It is set by the manufacturer according to the cooling solution, it's there for a good reason.
It is set by the manufacturer according to the cooling solution, it's there for a good reason.
derekullo
Splendid
- Jan 25, 2009
- 2,643
- 291
- 22,190
TDP or thermal design power is the maximum amount of heat generated by a component.
This is similar to a maximum temperature but this is instead measured in watts.
For instance, if your cpu generates 140 watts, then you better be sure your cooling solution is able to dissipate at least 140 watts if you were running a torture test like prime95.
The Cooler Master Hyper 212 EVO is able to dissipate 180 watts at max rpm which makes it suitable to cool pretty much any intel chip at stock clock speeds.
Overclocking also obeys the tdp. Graphics cards will throttle once they hit the preprogrammed tdp even if they are running cool.
You can of course flash the bios of those cards like the post above me said, but be sure you know what you are doing.
Water cooled heat dissipation systems naturally have a higher tdp due to water having a higher specific heat than air, which allows for more efficient heat transfer for the components being cooled.
In recap saying I want to limit the temperature of something to 70 °F mean nothing if you don't have the hardware to back it up.
Saying my Cooler Master Hyper 212 EVO dissipates 180 watts and my cpu is only using 50 watts therefore i should never get below room temperature would be the correct way to understand it.
This is similar to a maximum temperature but this is instead measured in watts.
For instance, if your cpu generates 140 watts, then you better be sure your cooling solution is able to dissipate at least 140 watts if you were running a torture test like prime95.
The Cooler Master Hyper 212 EVO is able to dissipate 180 watts at max rpm which makes it suitable to cool pretty much any intel chip at stock clock speeds.
Overclocking also obeys the tdp. Graphics cards will throttle once they hit the preprogrammed tdp even if they are running cool.
You can of course flash the bios of those cards like the post above me said, but be sure you know what you are doing.
Water cooled heat dissipation systems naturally have a higher tdp due to water having a higher specific heat than air, which allows for more efficient heat transfer for the components being cooled.
In recap saying I want to limit the temperature of something to 70 °F mean nothing if you don't have the hardware to back it up.
Saying my Cooler Master Hyper 212 EVO dissipates 180 watts and my cpu is only using 50 watts therefore i should never get below room temperature would be the correct way to understand it.
But couldn't that be managed with temp limit? If the gpu is 30C hot then the vrms should be ok?
+ Is there a pascal flash in which I can increase power limit but still control voltage?
I understand that but the thing that triggers me is that my gtx 1080 is ~52C hot under load yet it cannot maintain a stable clock due to power limit...
I used evga precision xoc's hardware monitoring to check, Nothing else is '1' other than power limit, so it goes to the clock speed 1 set e.g'2088', power limit turns to one then clock changes to '2055' then power goes down, clock goes up...
furfydeeznutz
Commendable
- Jun 17, 2016
- 10
- 0
- 1,510
yes I noticed this on my gtx 970, I cant believe there is hardly any forms on this... my cards are capable of reaching a 1278 boost clock with no overclock enabled and even at 106 power limit, it still hits the power limit in the witcher 3 down clocking it to around 1203 and 1174. in gpuz render test its at 98% gpu load and limited by voltage and will hold a stable 1278 boost clock, no fluctuations with 0 overclock applied 100% power target and 65c temp. but as soon as I run witcher 3 power limit kicks in and throttles. almost like it wont allow the gpu to max out the voltage to run a full boost clock.
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