Pump needs to have 100% power all the time though? plugging it into a pwm will surely not give it constant power and will vary it like it would a fan.
Okay, moved my two akasa venom case fans into push/pull, blew dust off everything. Realized the screws for the CPU block were quite loose so i tightened them all the way. Been running Prime95 for 25 minutes and highest temp is 75, took about 10 minutes to get from 22 degrees to 75 and hasn't gone any higher.