I’m sorry I couldn’t post my reply sooner due to issues EVGA forums were having.
DeadlyMercury
Then 2nd bios is a solution. But I am talking about 2080ti and don't know does 2080S have it.
Try to search for bios switch on your gpu, it could be located near external power. If you card has one, then switch it to OC bios and that will prevent fan from stopping.
Thank you! Thank you! Thank you!!! I had my card in front of me like 1,000 times and never noticed this switch! I guess small gray font on blackish background makes it invisible to my eyesight. Switching to OC BIOS addressed the issue of grating and gave me bit better thermals :)
DeadlyMercury
ZoranC
I haven’t seen such behavior with stock fan, PX1 reports back its rpms are what they should be.
Hm, did you tried custom fan curve with stock fan at it was working normally?
Mine wasn't.
I stand corrected again :) The other day for the first time ever I saw same issue with stock fan on standard BIOS, just in much much lesser frequency than with Noctua which is what was making me think I don’t have it with stock fan. But once I watched long enough … yeah, it was there, 60 RPMs is definitely not 40% of stock fan 2.
So to recap: When one tries to use PX1 custom fan curve with either stock or Noctua fans reported fan 2 speeds end up oscillating between 0 and whatever they are supposed to be. I didn’t observe it happening when it is card controlling fans, neither with standard nor with OC BIOS.
Which to me strongly points in direction of PX1. It is either interfering with fan speeds or it is interfering with readout of fan speed. I can’t say which one of those two it is as I don’t have a way, nor knowledge, to find out what fan was actually instructed to do nor what are its actual RPMs.
-HOWEVER- that does
NOT mean everything is working fine when card itself is driving fan!
When I rely on card to drive fans rad one intermittently stays “stuck” at 800-ish RPMs. In turn temperature hits, for example, up to mid 70s C when running TimeSpy Extreme. Otherwise fan reaches as much as 1400+ RPMs and temperature stays in mid 50s C. I’ve observed that happen with both stock and Noctua fan, just more frequently with Noctua.
So in the end I gave up fighting with EVGA (for now) and did exactly what you suggested I should do: I am using OC BIOS for driving of the fan 1 so I don’t have to ever hear that grating sound and rad fan I’ve connected to SYS2_FAN on mb at 80%. Even at 80% Noctua is still very quiet, quiet enough that at the moment I can’t notice it / it doesn’t bother me, yet TimeSpy Extreme temperature doesn’t exceed low 50s C.
Thank you again!