It looks as though the second set of voltage sliders do more than just configure how much voltage is allowed to be added in an OC app.
I set them both to the same, 1.2375v, and the card runs without perfcaps, briefly, when running Superposition.
Working as intended, but the card gets too hot too fast in my case at that voltage!
I have attached a log anyway
1600MHz on your 980 Ti under water, nice! I have a feeling mine would do quite well under water as it certainly doesn't need 1.2375v to be stable at 1455MHz.
I plan on doing a new build soon, R7 2700X etc, and a new case with an aim of improving airflow. It's not terrible currently, I can imagine there are 980 Ti's stuffed into much worse cases than a Fractal R3 with high speed fans in the front and back!
EDIT: added a log for the card configured to run at 1.168v, had to run Superposition twice to reach thermal throttle at that voltage.
I have tried another method, posted here https://www.overclock.net/forum/69-n...l#post23897936
Essentially due to Maxwell not wanting to throttle down correctly when configuring boost to go to 74, it is based around configuring your desired frequency to rest on the bin the card boosts to by default, in my case, 60.
Bin 60 set at the volts you want, in my case 1.1625v-1.1625v, and stepping down each bin from there to 35 by one notch. I have configured 1455.5 to fall on bin 60.
But I've come across something weird.
If I set GPC XBAR L2C SYS max to the boost tables max which is 1633.0, I get VREL VOP and occasionally PWR soon after stressing the card BUT no frequency throttle until 82c. TDP showing around 65%
If I set GPC XBAR L2C SYS max to my desired overclock, 1455.5, I get no perfcaps until 82c, and even then only VREL, but with the same frequency step down at 82c too.
Ahh, GPC being set higher brings these reported Perfcaps, but no actual change in performance vs setting it to the same as bin 60 1455.
I think I'll leave it like this, the card doesn't heat up as fast with LPC SYS and XBAR set to 1455.5 also, and there is no throttling until 82c, and voltage is stepping down also when this occurs, so freqencies stay higher overall.
Will probably change things again once the card is in a different case/I put it under water!