Originally Posted by Shocky
Did you run the benchmark while your phone was charging? Normally the Galaxy S4 GT-i9505 should score around 11700, the only reason it scores lower is due to thermal throttling usually so it can vary allot
Lowest I've scored is around 10800 and I'e run it a few dozen times.
Are you getting stuttering in all games? Ski Safari works perfectly here and it has relatively simple graphics so you should't have any issues.
Again try a hard reset, if your still having problems I'd consider a replacement.
No it wasn't plugged, and I suppose that it does make a difference?...and by hard reset, you mean "FACTORY DATA RESET" from Backup and reset in setting?