Anthony_122 :
Just wondering so i can get a general idea. my CPU under load usually is about 46 degrees Celsius.
running a evo212 (air) 1.38v 4.4ghz fx-8350 black and i defo have a problem with heat running a r9290
< 1% 33c
< 10% 40c
> 90% 63c @10 minutes
% = ultilization of the entire cpu.
so i would say your temp of 45c is something tobe jelous off.. or you need todo some more testing try prime95 using all cores
at about 67c is where you should freakout about livespan. at about >70 it melting down.
no fx chip is the same.. they all come with what it seems a random voltage.. witch in turn make it perform and act difrent..
you cant compare your fx with the next exsact same cpu. also your psu and board plays a role in temperture, stability and...