Upgrading MY PC

[CoZTraDaMuS]

I might as well ask another question.

I currently have a Dell XPS 410 which I have upgraded a just a bit.
Intel C2D 5400
4gig corsair (4x1) ram 5300
ATI 1300xt graphics card
on board audio and ethernet
350w dell PS

I've been experiencing some lag now when playing some of the newer games, im guessing i need to upgrade the GPU and power supply. From what I understand if I do upgrade PS from anything that is not a dell bought, I violate the policy. Any way I can get around this, or am I just about ready to build a new computer for myself as well?

 

[veg1992]

I'd recommend trashing it and buying a new build.. or You can get the Dell Upgrade PSU's from PC Power and Cooling:

Dell Upgrade Power Supplies from PC Power & Cooling

and then pick up an HD 4670 or 9600GSO or something