Hi.I will dont write a long sentence this time so shortly,i started to think about OS's of computer (windows 7 and 8.1).So which one is better for gaming ?(and maybe for better FPS =?).I m currently using Windows 7 Ultimate but (it says write a serial number so i m using other one,which one isnt using serial.Shortly serial date ended that i typed)).I am using nvidia gtx 770 direct cu edition (2 GB).My CPU is intel i5 4670K and mainboard is : Sabertooth of asus - z87-a.Please tell me which one will give me better fps and tellme which one is better for gaming.