Can i upgrade from a radeon 9200 to a radeon 9800

I have a Median PC which has AGP slots. I currently have a Radeon 9200 graphic card but need a 9800 to be able to run a new game.

I bought a Radeon 9800 AGP but it wouldn't fit as the card has more depth with the fan been bigger. Can you get 9800 cards which are as thin as the 9200 or do I need a new computer?

get a used 9600xt or pro instead, its shorter like the 9200, the xt is clocked to 500, the faster clock almost catches a 9800, the pro runs at 400 u will have to overclock it to 460-480 most overclock to close to xt speeds since its the same gpu core.
most importantly the 9600 is a directx 9.0c shader 2.0 card, and the 9200 is a shader 1.4 directx 8.1b shader card, the 9200 however is alot faster than even the 9800, but mostly because it gets a break rendering in 8.1b shaders instead,
the 9200 was the fastest directx 8.1b card ever made with the exception of maybe the geforce 4 ti 4600. it is not to be confused with the much slower budget 9250.
stay away from any ati cards that end in SE or most that end in 50 like the 9550,
and nivida's cards that end in XT or LE, like a 7300LE, they are slower than your current card.

your best bet is to go to a used computer store if you have one in your area, maybe they have a old 6600gt or x700, x1650, i disagree there are lots of agp cards around used and if all u want is directx9.0c shaders to run a few games then buying a whole system is alot of money to waste when you could find a card for under $50 that is still pretty good.
to equal your 9200 you will need to replace it with at least a 9600xt, x700,x800, the x1650 is slower i think but the x1800 and x1900 are longer cards, nvidia made a massive 6800 but some 6600's were smaller, the 7600gt and 8600gt might be shorter too.

http://www.newegg.ca/Product/Produ [...] 6814102814
3650 120 shader agp for $66.
http://www.newegg.ca/Product/Produ [...] 6814150433
4650 1gb agp 320 shaders, $100, i doubt your single core cpu can feed this fast card, and its getting expensive.
the 3650 agp is a common card you should be able to find it local new, maybe cheaper than that. don't get the 3450 its only 40 shaders its too slow much slower than your 9200.
MAKE SURE IF YOU ARE BUYING USED TO SEE IT WORKING FIRST, AND PLAY A GAME WITH SOME 3D GRAPHICS OR AT LEAST BOOT WINDOWS AND RUN FOR A WHILE, LISTEN TO SEE IF THE FAN IS NOISY OR NOT, SO YOU DON'T END UP WITH A DEAD CARD.
well good luck.