Please treat yourself nicely and get a decent card that supports shader model 3.0 at the least.
You could easily pick up a 7900 GS for around $35 if you have access to Ebay. I don't know what country you are
from so I can't say that price for certain but at least you can look! The 7900 GS is cost effective and it should
offer you some performance that you drastically need! If you want, you could try for an 8800 GT or 9800 GT for around
$50 on Ebay. I have a Zotac 9800 GT in one of my builds and its still a great performer in today's standards!
AMD Phenom II X6 3.2Ghz, 8GB DDR3 Extreme RAM,
ASUS M4N98TD EVO Motherboard, Nvidia 560 Ti 1GB DDR5