Looking in the Asus Site for your motherboard - Asus K8S-MX
tells that your m/b supports
1 x AGP 8X/4X slot
And from the manual. it quotes this:
The AGP slot supports AGP 8X/4X (+1.5V) Cards.
From the info I got from Tom's Hardware, chk this link below:
*www.tomshardware.com/2008/02/04/best_cards_february_2008/page6.html
there are 2 good AGP based cards:
Best AGP Card For Under $100 (
Rs. 4000):
Radeon X1650 PRO
Best AGP Card For ~$115 (
Rs. 4600) :
Radeon HD 2600 XT
Dunno what is your budget, but You could also go in for
ATI X1950 PRO or
nVidia 7900 GS, which is priced around
Rs. 6000.
Also, make sure you buy AGP cards with 1.5V specification. If you dunno how 1.5 V AGP cards look, have a look in the Compatibility section from the following link:
*en.wikipedia.org/wiki/Accelerated_Graphics_Port
Image Link: *en.wikipedia.org/wiki/Image:AGP_&_AGP_Pro_Keying.svg
