My home-built is getting old but want to get some more years if possible...MSI 7

[flagbag]

Hi you smart guys (gals?) out there... Help an old fart-out here please...

My home-built is getting old but want to get some more years if possible...
AMD Athlon 64 (ordered an Opteron 175 coming-in to replace it)
MS-7125 K8 Neo 4Moboard
3GB RAM
WIN XP still
My Video card, Nvidea GeForce7800GT has been awesome since I installed it in year 2006, but wonder what I can replace it with? I mean, is there a newer once that would make a noticeable difference? Or would upgrading it be a waste of money?
Can't find web site that says what is the best card for my set-up, So I turn to you for your wise advice and opinions.... I'm really not that old, but I was born before 1960 if that tells ya anything!!!
Sure appreciate any help. Thanks in advance, and God Bless.

 

[ashharun]

Please give more specific information like budget and what you expect from your upgrade. 7800GT is way too old, an upgrade will be great. And your cpu will bottleneck fast graphic card now