GTXJackBauerWhat are the temps you're alluding too? I would just plug it to the motherboard and run the rad fan anywhere from 1000-1500 RPM. Being it's only a 120mm, I bet it's getting heat saturated and not enough air flow to it. Find a happy medium and leave it at a fixed speed.
Luminoth Prime My case has very good airflow, and the air coming out of my top two exhaust fans is almost always cool, as was my rear exhaust with my 980 before I put in the 2080 with its radiator. Now, the back top exhaust (right above the radiator) is often a little warm when gaming, and the rear exhaust is very warm. The top fan farther away from the radiator is still cool.
Luminoth Prime EDIT: I opened up my computer, unplugged the fan from the 2080, plugged it into the motherboard instead, set it to run at 10 volts, which is about 1250 RPM, and now my temperatures seem much more normal. KF2 on the same settings as earlier ran at 50-55 degrees, so that's a 10 degree improvement and seems much more reasonable for what I'm pushing. It doesn't slowly build or decrease in heat like it did before, either. So that solves my temperature problem. ADDENDUM QUESTION: Should I consider getting a second fan to run a push/pull setup? How much would that improve my temperatures? I'd like to push the card higher, as in running higher graphics settings and still maintain cooler temperatures/consistent performance, and adding another fan is doable for my setup.
GTXJackBauer Make sure you don't have the radiator positioned in the back with the top fans as exhaust because you're basically pulling the inflow of air away from the radiator to the top. I would position this radiator in front of the case at the same height of the rear fan. It helps keep the rad above the GPU so any air pockets in the loop get trapped in the rad and make sure the returns to the GPU are position at the bottom of the rad. That's great news. A few things could have happened. The fan's PWM isn't compatible with the header of the GPU/software. Maybe they were designed and tested mostly with the EVGA fans but I'm not 100% sure but I've seen similar issues where some feel they don't have control of the fan. The other reason could be that the fan settings kept the fan too low and so by the time it was told to ramp up, the radiator was too heat saturated at that point and your temps stayed in that range. Sure you could go push and pull. Just make sure you grab the same Noctua fan and find a splitter cable that only returns one RPM signal back to the header. It could decrease your temps by a few or more but also position and quality of air is key. The best thermal performance I've seen by other members is doing exactly what you just did while using the front as intake. They used the MB header, setting up a fix rate and going push and pull. A member here has done exactly that and gets amazing temps. Actually close to custom but probably has hit the low point of diminishing returns as I feel he'll need to go to custom to go even lower. Your temp limit on the GPU is 89c. It will throttles down first before it hits that temp wall and will evetually thermal protect itself by shutting down or locking up or what have you.
ZoranCBut in either case you might want to open a ticket with EVGA for fixing of PX1 like I did today and join me in my effort.
DeadlyMercuryZoranCBut in either case you might want to open a ticket with EVGA for fixing of PX1 like I did today and join me in my effort.I did that like a half year ago or so :)
bob16314In Precision you can double-click inside the Fan Curve Editor to change it from a curve to steppings, and vice-versa, and see if steppings help any.