HardOCP checked out the Battlefield 4 Windows 7 vs. 8.1 Performance
A quote from the article:
Is in-game real world Battlefield 4 gaming performance better on the Windows 8.1 operating system or on Windows 7 We look at video card performance between Windows 7 and Windows 8.1 in this game and find out if upgrading to Windows 8.1 is worth it or not for the much rumored performance advantage.Battlefield 4 Windows 7 vs. 8.1 Performance Review @ HardOCP