Pink is the New Black

Okay, our tower is less than a year old (we got it 04/18/2010 ;))

So, it's overheating ... when we game. We know that we need both a new power supply and/or a graphics card.

BIG issue is the graphics card, but we might have to upgrade the power supply to get a new graphics card. We're not burning this one out.

Well, I'm not sure what to look at for this.

Tower: HP P6310y
Motherboard: M2N78-LA (Violet6)
Processor: AMD Athlon X4 630
Current card: GeForce 9100 integrated POS (even NVIDIA says that )

Power supply is currently only 300W. It's model number is ATX0300D5WC.

So ... any suggestions on what the computer can handle would be like totally awesome ;)
We're hoping to get a 1-gig card, since the tower can HANDLE 16gigs without a problem. We only have 6gigs , so we can upgrade EASILY ;)

You know it's bad when my 2-year-old laptop with 2 gigs of RAM can handle games better than the tower so we gotta get this fixed SOON ... you know, before the house, and we're totally broke forever