i7 3770 Idle Temps

[JL94x4]

I'm wondering about my idle temps on my CPU. My CPU Idle times at the moment are 44-47 at 5-8% CPU load, now i know this shouldn't be like that.

I'm using a Corsair H55 liquid cooler, and have the radiator fan as an intake fan.

I have 2 other 120mm front fans being intakes along side the cooler, 1 back 120mm fan as exhaust and two top 120mm fans as exhausts too.

I have a Mid tower with an ATX board, all wire management is done brilliantly there is plenty of room in the case, so i have no idea why the idle temps are so high.

100% Load temps using Aida64 go to around 85c after around 45mins-1hr.

Things I've tried so far;

- Changing thermal paste x2 times
- Swapping fan set ups


Things i want to rule out;

- Liquid cooler not working correctly?
- CPU is doing what it should be doing

 

[JL94x4]

Tubes are cool.

One observation i've noticed though in core temps, my Core #0 is always at 15% or more, it literally never drops below 15%. My other 3 cores are all around 3%-5% at idle.

Is that normal behaviour?