As Kaapstad has indicated the CPU heat is not your problem. My CPU hits ~75c under full load but the temps in my case stay relatively cool.
I strongly recommend you change your intake 200mm fan to one of these http://www.overclockers.co.uk/showproduct.php?prodid=FG-063-BX&groupid=701&catid=2331&subcat=2335 or the LED variants in the same range. These move way more air than the standard fans and are also pretty quiet.
Your real problem is case air flow. You don't have enough cooler air coming into your case. You might find that you invest in an AIO CPU cooler and have the same problem manifesting itself.
1. Change the 200mm to the one above.
2. Change the orientation of your cooler so it puts upwards blowing the warm air to the top.
3. Change the rear fan orientation to an intake fan not exhaust.
It's a shame you don't have a side panel fan as I've found it keeps GPU's with your style of heatsink much cooler.
Also what are your ambient temperatures like? I presume your case is not near a radiator?![]()
1. Was going to buy that fan when I built the pc but it was never in stock.
2. I will give that ago when I have time to take my pc apart again.
3. I will change that tonight
But are there any reviews on this? If it would make a lot of difference I will buy 1 in a month
OcUK Tech Labs Fathom All in One Custom Cooler 240mm