Suddenly more FPS in games

[Lionkid]

After a storm I received a new motherboard (same qualities as the former one) and a 420W power supply instead of the 450W (but a newer type)... I got 30-40 more FPS in games (Fallout 4, Witcher 3, Smite) on high settings than before on medium... Is it possible that a new power supply and a new motherboard (and windows reinstall) give such a mentionable performance increase?
Thanks in advance, Andrew

 

[Mr Kagouris]

Could you please list your PC's full specs? Also make sure your monitor is set to the same resolution as before.

 

[Lionkid]

Could you please list your PC's full specs? Also make sure your monitor is set to the same resolution as before.

Sure thing!

Processor: AMD A8-5600K APU with Radeon(tm) HD Graphics
Video Card: NVIDIA GeForce GTX 750
RAM: 8.0 GB DDR3
Operating System: Microsoft Windows 8.1 Enterprise Edition (build 9600), 64-bit
These components are the same, the changes are:

Motherboard: I don't remember the exact type... it was a Gigabyte... either a GA-F2A55-DS3 or a GA-F2A75M-HD2 (don't have the box and left the dead motherboard at the service) now I have an Asrock FM2A68M-HD+ (the guy at the shop told me it has the same properties like my dead motherboard)
Power supply: it was a noname supply at 450 Watts and now a 420 Watt unit (honestly I don't know the brand, but it's nothing famous) and my previous supply was 5 years old

Don't misunderstand me, I'm not complaining about anything at all, it is just interesting for me that suddenly everything is smoother without changing VGA or CPU or RAM or something like that =D

 

[sadams04]

Is it possible that a new power supply and a new motherboard (and windows reinstall) give such a mentionable performance increase?

...likely a driver / chipset update that made the difference when reinstalling Windows. Changing out hardware at that layer won't have that type of effect.