CPU: intel i3-3220 LGA1155
MOB: MSI B75MA-P45
GPU: using the built-in of i3-322
RAM: Kingston DDR3-1600 HyperX blu 4GB*1
SSD: Plextor M5-PRO 128GB
CAS: GIGABYTE GZ-F3
CAN THIS SPEC RUN ON A 300W 80+ PSU?
Would be helpful to know brand & model of the 300w psu,
to check the specs and whether the specs are 'real'.
However, it is very likely this unit can power your system fine
as you are running on board graphics and not using a
I'd say (still would like to see make/model), you are good to go.