Just wondering GTX 1080 is normal to run at 4.8sol/s

Got 13-14 Sol/s with GTX1080Ti (Win10Pro x64), current profit is compatible with ZEC
I have been waiting for 1 hours but the speed still stuck at 4.8s/s.... which pool are you mining? whats ur OC config?
I've used suprnova pool, tested with stock clocks on Win10 Pro x64 (not more 1 hour), drivers 382.05 (GTX 1080Ti Palit SJS)