Win10 is still suffering from all manner of driver issues. GPU drivers, USB drivers, NVMe and PCI SSD drivers. Asus is notorious for providing timely driver/device support - especially for their ROG laptops - and their in-house apps (AI Suite, etc) have troublesome quirks in Win10. Even Microsoft's own C++ runtimes aren't yet fully version compatible with Win10, so a lot of component-based software (like Catalyst and GeForce) are equally broken until Win10 gets past all its teething pains.
So ... yay on Win10 ... half a year from now, once Microsoft and Asus and everybody else can work out issues and unify all their driver codebase dependencies. But nay on Win10 right now, it's bloaty and complex enough to take a while to move through this public "beta" phase - you may find it breaks more things than it fixes and that (due to Microsoft's Windows Product Key stuff) it's a one-way trip.
I would personally avoid Win10 until other people with the same motherboard/laptop/hardware start reporting that it all just works, automatically and seemlessly. But people right now are complaining too much about what the Win10 "upgrade" broke on their systems.
More fps? Not likely. Win10 runs more tasks and more services = more bloat = more demand on system resources. The only fps improvements in Win10 come from DX12 - or more correctly, they will come when the final implementation of DX12 is fully stable and fully compatible.
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