Amd GPU stuck at 450 mhz clock while gaming

[kodikos]

well hi guys...
i recently bought a new amd gpu r7 265 by saphire to replace my old hd 7750 which was working fine..
so when i start to play league of legends i noticed some fps drops which is pretty weird since my gpu should handle this game perfect even in high settings
So using gpu-z i came up with this : at idle gpu clocks are 300 for gpu and 150 for memory but when i gaming are 300-450 for gpu clock and 1400 for memory..
I think that my gpu clock during gaming should be 925 and i get these fps drops cause it is so low..
Any suggestions?
i have a core i3 4th generation a 600w psu and i have a clear install of the catalyst 14.12 drives..

 

[bystander]

I've had this sort of issue with IE open/minimized while gaming. Check that nothing is open, other than the game, that has GPU acceleration.

 

[kodikos]

chrome has...
well my older gpu hd 7750 had absolutely no problems..
is there any possibility that the new one may be broken or smthing?
actually when i run benchmarks it works perfect at 925 gpu clock..the problem occurs only in LoL.
is there any option that gpu uses low gpu clocks on "lightweight" games?

 

[bystander]

There might be, but I'm not familiar with AMD's latest software. I had the problem back in the 6950 era. Nvidia has a maximum performance mode that fixes that sort of issue.