I currently own an older P3 based system, using an Asus CUSL2-C motherboard with an AGP 2.0 (4x/2x/1x) compatible slot. My current video card is an ATI AIW Radeon (Radeon 7200 chip) which is a 4x/2x AGP card. Unfortunately, I cannot afford to get a new P4 system at this time, but would like to upgrade my video card to a DirectX 9.0 compatible card. When looking at newer cards, like the ATI Radeon 9600XT, it is an AGP 8x/4x with 0.8V at 8x and 1.5V at 4x. I realize that from a AGP speed compatibility (8x/4x/2x/1x), my motherboard AGP slot could accept the new video card, running it at only the 4x speed. Where I have a bit of confusion is whether or not my motherboard AGP slot would support the 1.5V video card. I have checked my manual but it fails to provide that level of detail so I am not sure if my AGP slot is 3.3V, 1.5V or supports both. If anyone can provide any help, it would be appreciated. Thanks, Pup

i serously doubt it will work, because your card is agp revision 2.0 and the card you're looking at is revision 3.0, even though both cards support 4x...it won't fit in the slot Abit AS8 LGA775 2.8 Prescott 2 x 512 OCZ Platinum PC3200 dual channel 128 meg Radeon 9800 Pro DUAL 36 GIG WD Raptors Raid 0 DUAL 21 in. 19.8 viewable Sony Trinitrons 3+ Mbps cable con

Yes it may work. I was in the same position as you and it was a bit of a pain in the ass finding out if installing a 8X card would work in a 4x/2x/1x slot. I own an asus K7V mother board and it also has AGP 2.0, after hours of searching I found that the port supplyd 1.5V, but I still didnt know if an 8X card would work because of the 0.8V/1.5V problem. In the end I asked the guy at the computer shop if it would work and he said it would. So I upgraded my 32Mb TNT2 to a 128MB ASUS RADEON A9550. I had troubles at first in GTA3 but I turned off fast write and she ran like a charm and still does. Do lots and lots and lots of reaserch and then some more. Its the only way you can find out. Anyways here is some stuff that may help you out, this is some of the pictures I found helpfull when I was trying to find out if it would work: www.mattwizzsite.50megs.com/computing.html I made this page so please take a look I think it may help you. Also go to the card manufacturers forums, you will get a person which knows everything about the cards they make and they will give you a definate answer. Mattwizz3 : ) AMD K-7 600MHz & Asus K7v 256Mb SDRAM 80Gb WDC, 8Mb Buffer 128Mb ASUS Radeon A9550 Cyber Drive CD-RW DVD Combo Spirit TV tuner

Mattwizz3 I had to remove the www. to make www.mattwizzsite.50megs.com/computing.html work.

AGP 1.0: AGP 1x, 2x, 3,3V AGP 2.0: AGP 1x, 2x, 4x, 1,5V AGP 3.0: AGP 1x, 2x, 4x, 8x, 0,8V According to AGP standard every device has to be compatible one number upward and downward. This means in you AGP 2.0 board every AGP card has to fit. Only an AGP 1.0 and an AGP 3.0 card or the other way around will not work. But some manufacturers have AGP 8x cards that also work in a AGP 2x board but you have to be sure about that or both card and board could be damaged. I have an Asus A7V133 Raid board with AGP 4x and a Athlon TBird 1,2@1,33GHz myself and have a MSI FX5900XT-VTD128 in it. It works very well and even games with that minimal cpu requirement run well with really good graphic quality!

I would like to thank everyone for there responses that you have posted, it has been helpful. It seems like there is an upgrade path that can be followed but you really need to ensure you have the correct combination. I have done additional research, and it looks like ATI's card is only AGP 3.0 compliant, whereas Nvidia's FX57xx series card is Universal AGP compliant, and there website stated about the backwards compatibility of the AGP standard. But I will keep asking questions before I buy. Thanks Again, Pup