If you give us your system specs (motherboard, cpu, ram and psu) and the name of the game you are wanting to play, we will help you find the best card for your system. Also, a budget is probably a good idea as well.
In the meantime, here is an article on shaders for you.
Ok, I got an agp slot, 1.8Ghz intel pentium 4 cpu, 512mb of ram, 550 watt psu, P4S333 Motherboard. The game I want to play does not require much, it is broken sword angel of death all i need is an upgraded video card that is atleast 128mb and a shader model. If you can recomend me a good card it will be appreciated, and by the way I live in australia and am on a very low budget maybe $100 australian, Wouldnt mind buying 2nd hand though. Thanx
Ive found a lot of 6600 but 90% of them are PCI-E is there any specific search I should make?
Also the only agp compatible cards are 8x my slot is only 4x I think im gonna go with the radeon, Also this might be pushing it but like antradox says if the radeon 9800 can play farcry really good do you think I could maybe get a 9600 or 9750 instead and still have relatively good visuals for Broken sword?
Hmmm well I dont want to risk having my card fried, I found a good deal and I was planning on buying this-> ATI RADEON 9800 128MB DDR AGP VIDEO CARD 256BIT/> it says that it can support 8x slots, but When i asked the seller if it supports 4x he said yes, question is can I believe him..
I also forgot to ask will this video card support directX 9.0c as the seller does not state this.