H105 new build problems

I have built a new rig today and installed the H105 as my CPU cooler on my new 4790k, the idle temperature though is sitting at around 50oC. This is only a load of approximately 20-30% and I feel this is a bit high before I begin to throw stuff at it. I have not been able to get it to move down in temperature no matter what I try. The motherboard I have has a special pin for water coolers on which it is attached the light on the cooler is lit and I have the fan seed set to high to give it extra power it needs and I have even reapplied thermal paste to the CPU all to no avail.





Please help me as I want to play games. :/