please help me find a good graphics card

Well my desktop came with an HD3450 by ati but its good for HD video but not gaming so I am looking to upgrade the graphics card because I have no clue whats compatible with my system ; ;

Ithas a x16 2.0slot

PSU is 250w

2gb of ddr2 ram(planning to upgrade to 4gb)

pentium dual core @ 2.2ghz

its a dell vostro 220s slim tower purchased by the end of 2008if it helps

let me know if you need anymore info and thanks in advanced :)

My budget is $175

I am willing to upgrade

how much do I need to power it?

and what graphics card should I place along with the new psu?

I currently play mw2,cod4 and l4d2 on normal to med settings with the HD3450

so something that will make these games better is okay

Antec Earthwatts 430 watt

and

HD4850 512mb

$160 total and with shipping should still be just within your budget.

Antec Earthwatts 430 watt

and

HD4850 512mb

$160 total and with shipping should still be just within your budget.

tequilasunriser

Sweet, thanks all.

gh I forgot to ask this but when upgrading the PSU its just switch the cables?or do I need to apply some settings ? Just curious to see because I think it could give more power than required(I'm pretty sure this is a noobish question so please bear with me ;;)

Just switch out the cables. No settings tweaks.

The graphics card will require drivers though, so you'll need to strip out your previous video drivers before installing the new ones.

Okay then that and knowing how to keep static electricity away should be enough to do this upgrade myself :)

Would you know of a simmilar card to this one I read the reviews just before ordering it and many have said it tends to stop working after a while ;(