CPU Temperature issues

I'm having an issue with the temperature on my CPU.
It's water cooled, and off load its running at roughly 90 degrees.

It's not the water cooler, or the connection between that and the CPU/Thermal paste.
The pipes are definitely carrying a lot of heat away from the processor, and it's making it the the radiator, and carrying cool liquid back.

I'm using -
Asus M4A87TD EVO MoBO
AMD Phenom II X4 965 Black Edition
And an unbranded PSU

I've tried swapping out the parts, different motherboard, power supply (A very fancy and expensive named brand), in different combinations with the CPU, and checked and rechecked the cooling, but it still retains ridiculous heat.

I've tried lowering the voltage on the CPU in the bios, to as low as remains stable, but it remains above 80 degrees.

Should I at this point assume that the CPU is faulty in some way, or are there things I have missed?

Kind regards

 

What liquid cooler are you using?

I have read that some temperature sensors simply report incorrect temperatures... perhaps double what they should? What are you using to read the temperatures?

 

Yes as W3D said we need more information, your pump, your tube diameter, radiator size, reservoir and a description of your loop in good detail, if you could post a picture even better.

To save us time post a link to the manufacturer of your pumps spec page or just post the specs.

By your description you don't have a good enough flow rate. You shouldn't be able to feel the heat coming from the cpu or cooler water coming from the radiator, it should all feel the same temperature as the cpu will only heat the water up a couple of degree's and radiator cool it down again a couple of degree's even at full load. You definitely shouldn't be able to feel any difference when the cpu is at idle.

The most obvious thing is an air trap, does your system make a gurgling sound or any sound at all? You should only hear the sound of the pump.

The system must be carefully filled via the reservoir, turned on until the water has been sucked in, pump turned off then refill the reservoir and repeat until no more water is taken, all the air should automatically bleed from the top of the reservoir.