Power supply + 7800gtx

[Begbie]

Hey,

Just got a 7800gtx and after installing drivers it tells me that there is not enough power and that it is going to decrease the performance!!

Running 3800 x2, 1.5gb ram, power supply is 430W thermal tack! Bought it stupidly over a year ago, wish I hadn't now, buy cheap by twice by the looks of things.

Any help guys, am I doing something wrong here?

Edit: Also getting this wave going through my screen!!

 

[Begbie]

Damn, so it is the power supply then, couldn't be anything else?

 

[Begbie]

Yeah, was me being stupit! Damn cable wasn't in. Still getting this wave though and yeah its on everything. Newest drivers installed.