I am a complete novice at this so I hope you are all patient 
I have a Dell Dimension E521 with a stick 300W PSU and a AMD 4600+ x2 CPU.
The graphics card that can with my PC packed in a few months ago and I bought a 7300LE for £10 in PC world as a temporary fix.
I want a new card as I cannot play newer games in anything but low and I still lag!
I would prefer it if I didnt have to upgrade my PSU but if I have to and the price is right then I guess I could stretch my budget.
I was looking at the Radeon HD 3850. I have read that it will run with a 300W Dell PSU and I have also read that it will not run with it.
I am very confused and just dont know which way to turn.
Any advise you all can give me would be great!

I have a Dell Dimension E521 with a stick 300W PSU and a AMD 4600+ x2 CPU.
The graphics card that can with my PC packed in a few months ago and I bought a 7300LE for £10 in PC world as a temporary fix.
I want a new card as I cannot play newer games in anything but low and I still lag!
I would prefer it if I didnt have to upgrade my PSU but if I have to and the price is right then I guess I could stretch my budget.
I was looking at the Radeon HD 3850. I have read that it will run with a 300W Dell PSU and I have also read that it will not run with it.
I am very confused and just dont know which way to turn.
Any advise you all can give me would be great!
