So i recently upgraded my heat/fan to a xigmatek achilles s1284c , my old stock cooler managed to keep temperatures at about 46 C, but with the new cooler i'm gettting anywhere between 50 to 79 C!! i'm not using the fan that came with it, instead i'm using the XigmaTek XAF-F1456 140mm because its so much quieter and should have more airflow.
so my question is why am I getting such high temps?
I thought I'd come back here and post the solution:
The new fan I was using was an air flow optimised fan, the original fan was designed to great static pressure, I did know about the difference between the two types but I never thought it would make such a huge difference in cooling!
"make sure you use the right fans for the right job!"