Right I have a 550ti but only a 300w power supply. My performance is shocking on it.
Is this cause my power supply?
It's recommended to have a 400w +
Also my processor is only at like 70-80% use
What does that mean then?
What it means is that if/when the 300W power supply decides to up and die from the strain, it doesn't take anything else with it. Underpowered (or even worse, under powered no name) power supplies have been known to take out motherboards, video cards and just about anything else connected to the motherboard when they go poof.
Okay just bought one
If possible, I would suggest returning the new one for a good quality 500W+ PSU from the likes of Seasonic, Corsair or XFX. It needs to have at least 24A on the +12v rail (See specs)
What happens if it doesn't
Louis your not listing to the good folks that are trying to help you. What happens when you use less than needed quality power supply is many things and none of them good.
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