Hello,
regarding noise and heat of rtx cards and rendering.
Rendering speed is the same when using optix. Regardless of mhz of the chip or powersettings.
I own a 2070 and just put it on 70% with sometimes fixed low curve so it only uses around 115 watt instead of the 175 watt it would normally use and it stays at lowest fan speed so its not audible for me.
Sadly afterburner doesent allow to go lower than 70% regardless of what i tried even loweing vcore isnt doing anything at that point with my card i cant bring it down much more it would do by itself by its own powersaving features at that point.
In Games its mostly irrelevant as most older games are running with max 60 or whatever anyway and for those who are not i would gain around 5 to 10 fps when going full speed but the fans on the card have a bad spot at those settings as the tend to squel a tiny bit.
Also at 70 i still do get the mhz i should get at 175 watt from nvidias specs its just not boosting as much. Maybe i got a bit lucky there but i can actually still overclock my card a bit if i wanted to even with power cut that much.
Regarding "overclock" tho or using msi afterburner auto oveclock i can only warn you, as it burned my fisrt card out after minutes even tho its supposed to be safe.
Luckily i got an instant replacement from my dealer as i paid extra for an instant return policy. So if you want to try that out do it as long as you can replace it. Safety feature seem to be garbage as the amazon game incident also has shown as something like that shouldn also be possible due to the chips should be able to detect and safethrottle .. but they arent.
But cutting power is good for the planet saves money lowers temps and prolongs life of the hardware.
And its not slowing rendering ...
Just wanted to let you know in case u didnt know.
Have a nice Weekend.
It's not completely true, but close.
I'm running the 3080ti at 65% power level and the 2080super at 50% power level. Perfomance is about 10% lower compared to running on 100%.
Power consumption combined is down from 520W to about 350W for the cards.
The more aggressive your power reduction, the more you're getting clock speed reductions, even below base specs.
Running the 3080ti at 50% will result in a preformance drop of more than 30%, which is not reasonable.
The 2080s can take a bit more reduction before this hits. The simple reason is that it's not running anywhere near it's max power when rendering. My card takes about 170W on max power and about 125W on 50%. (So I'm pretty sure it's the same for your 2070, only with reduced values).
The 3080ti takes almost 350W on full power when rendering. Anything below 225W and you get a too big performance hit. That's why I stayed with the 65%. Interesting enough, for the 2080s it's still higher in reality: 125/170 = 73.5%, which means I could probably go lower than 50% without a huge performance drop. But it's a bit accademic at this point, because noise is low already and heat as well. If it's 350W in total or 330W is not a change that warrants further experiments in my opinion.
I've tested and optimized for hours, even switching the card's slots several times and having one or the other power the display.
The 3080ti got a mild gpu overclock (which is esentially a voltage reduction at same clock speed). With this I got back about 1.5% of the performance for no additional heat or power. So end result of the speed reduction is about 8.5% now.