gfx card

yes.

No your Processor.

If you do it in DUOCORE what that card you have around 60/100 ping in ET.

Take 2 GB and its done.

Regarding your question my answer is no.

Your gfx card is old true, ET is more dependent on CPU power than on gfx card tho so you definitely need a new processor. The point is a new processor needs a new motherboard and the old gfx card wont fit in the new MB. Same goes for your RAM.

So you need new MB, new CPU, new RAM, new gfx card and a new power supply. Lol could have better told you what you can keep would been shorter. Anyway either get a complete new pc or buy new components and build it your own.

GL

If you keep your HD and Casing and stuff, you can get a decent rig for around 300€ these days, which should let you play everything on decent quality.