AMD A6 7400k running at 65°+ on idle??

[Memento R]

So I just recently upgraded my pc (First upgrade of this calibre I have ever done) Anyway I went from this:

Intel Core2 Duo E8400 (with stock cooler)(45-50° Idle)
EVGA GTX 580
Gigabyte EP35-DS3R
6GB of DDR2 RAM
750w Thermaltake power supply
500GB WD HDD

To this:

AMD A6 7400k Dual-core processor (stock cooler)
ASUS A68HM-PLUS Motherboard
Kingston HyperX Fury 8GB DDR3 RAM
(all other parts remained the same)


After installing the new parts, drivers etc.
I noticed there was not only no performance increase but the APU was running VERY hot.

Now with my limited experience I assumed the Core2 Duo was bottle-necking the 580 (due to the fact there was little to no difference between High and Low graphical settings in games I played FPS-wise), And I can only assume that the APU is doing the same thing due to the heat.

I have gone through and changed the fan array in my case around, ran it without side panels and with extra fans, with no improvements to be seen.

I have ordered new thermal paste, and am looking at buying a new CPU cooler altogether.

So to summarize I am basically asking if anyone has any other ideas as to why my new APU is running so hot, and why I am getting no performance increase over the old components (or am I just delusional thinking these components are any better) or if anyone has had the same problems with this particular processor.

Cheers,

R

 

[Obakasama]

With respect to performance: http://www.tomshardware.com/reviews/cpu-hierarchy,4312.html The A6-7400k isn't much more powerful than E8400. With respect to the tiering I think it's been suggested there needs to be at least a two tier difference to see a difference in performance.

As for temperatures, you should use AMD Overdrive to monitor 'thermal margins'. If the thermal margin is below 20 deg C, then you may need to reseat your cooler (and this entails). Basically, the closer the thermal margin is to 0 deg C, the closer it is to overheating.