1) My experience with Afterburner were not good when I tried it. The software made my GPU go 100% just from having a couple of tabs active in Chrome. I had to uninstall Afterburner and reinstall my drivers to get it back to normal. I then tried Firestorm from Zotac and it works well as far as I know. 2) I do not use the presets in Firestorm, I use the manual clocking settings. I have decided to try NVInspector though since it seems to be the tried and tested option. 3) This puzzles me, is 112.5mV normal? NVInspector shows both my GPU voltages at 1100mV @ 888Mhz. I have not touched the voltages, I do run the modified VBIOS from this forum. Flashing the VBIOS and BIOS was easy, no issues from my side. And the temperatures differ a few degrees, I usually get high 80's when gaming, underclocking reduced it only about 2-4 degrees C. (I did not monitor temperatures closely though, I can't give you exact numbers, just brief flash memories)