Originally Posted by bigsnyder
I am using the boost bios. Never really tried on the other. The theory is that the boost bios has a more aggressive fan profile and voltage. I don't have data to confirm either way. If you are setting voltages and fan profile manually, probably will not matter.
I have been tinkering for hours with the 2 bios settings last night. There is a difference in behavior of the card. Here a short summary of my observation:
It all started that I suddenly got lower 3DMark scores than the day before (with no OC in Boost Bios). Found that under load the card does not keep the GPU Core **** steady. It was fluctuating between 500-950 all the time. After finding a thread on this on another site - Setting power control to +10 % in CCC solved the issue.
NOW: I got the card up to being really stable at 1100/1400, not touching the voltage.
In Bios 1: 1100/1400 is running perfectly with NO power adjustment in CCC, all temperatures under load around 55-65C
In Bios 2: I have to up the power for 1100/1400: need +15 % to keep GPU steady here. same temperatures.
Heaven benchmark gives me exactly the same results for both bios settings. Hence the conclusion: There is a difference between these 2 settings. The difference is not performance related though. Maybe fan speed? I haven't checked for that last night. Why would one setting need more power to do the same thing? So what does that power slider really do?
I got the 8/8 pin version and can confirm that with Trixx 4.6.0 VDDC CAN be adjusted. Haven't touched it yet though - mine is at 1250 out of the box - with the option to go up to 1350.