Is my psu enough?

FinnZilla

Reputable
Jun 22, 2015
80
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4,640
Hi, I have a evga supernova b2 850W psu, and i was wondering if thats enough watts for these specs.

AMD FX 8320
AMD Radeon r9 290x
Gigabyte ga 78lmt usb3

My pc has been randomly restarting and im wondering if its too much wattage, cause i have lots of usbs