Testing all weak and i think i found the cause of the performance drop on my phone. For some reason i was playing Real Racing 3 when i found the game was getting a little slow in fps terms. So i went and deleted cache and dalvik, then after reboot i started playing again and is was running really neat and fast!
I decided to run Antutu again and to my surprise the phone was benchmark at 20700 constantly. Then i did the test again but with power saving on just to mark how much performance will drop with the feature on. The test came up with 16221 on benchmark, once again i wanted to test the phone with the feature off and after turning it off and waiting a couple of minutes did the test again.
The odd thing i found is that is was bench marking as if the power saving feature was on! 16000+ on all tests!! So again... went and deleted the dalvik and cache just to test again. After reboot, turned on Antutu and tested 4 times in a row, guess what? all test were 20k+!!!
Does this mean the power saving feature is broken?