I guess that's normal maybe. But as you can see at stock it's pulling 1.15 ish volts so you definetly can't speed it up and lower the volts.
My suggestion is raise it to 1.3, set it to the 4.4-4.5 ish mark you wanted, and lower it until its stable. If temps are good, you're done. If not try the remount, and if that doesn't work you need less volts, so you need to lower the speed and try to lower the voltage further