Better PSU = Lower GPU usage..?

[nekonime]

I noticed something weird about half an hour ago...

 

I had been running a Lepa MX-F1 350W PSU in my setup for about 4 years without any issue, until I upgraded to a GTX1050 (non-Ti). The USB ports would constantly disconnect and windows would complain about USB power surges. Odd, but it turned out to be the craptastic PSU wasn't enough anymore. Swapped it out for a Corsair CX550, and boom. USB issues gone! And... GPU usage in game... way down?

 

(Both observations are in Overwatch)

Before:

150-180fps

90-100% CPU (Would cause system to stutter at 100%)

80-95% GPU

 

Now:

150-180fps

80-90% CPU

10-25% GPU

 

Would this be expected for getting a PSU that better fit my config..?

 

My setup:

AMD FX-6300 @ 3.8GHz

EVGA GTX1050

16GB RAM @ 1333Mhz

Corsair CX550

Sandisk 120GB SSD

WD Blue 1TB

(Not that those last few really matter)

[Fasauceome]

Only thing I could think of is better voltage ripple or some other aspect of improved power delivery allowing GPU boost to work more magic, or if you're using task manager for the percentage, task manager's own inaccuracies.