Okay so I've remounted it, the paste spread looked good when I took it off but repasted it and remounted. Plugged the pump into CHA_FAN2 on my mobo. In the bios set it to DC, fan curve to manual and put it to run at 100% all the time. Saw the pump was running at 4000rpm.
Rebooted after changes, went into the bios saw temps in the bios was 45 degress celcius, still way to warm for the bios. I'm thinking maybe it's the way I have my rad mounted? See attached for how it's mounted at the moment. Please ignore the horrendous cable management, I don't care how it look atm want it to run cool before I tidy it up....