Sure, but your motherboard would have to support the 8x speed. You should check your bios for that information, or any manuals you received when you purchased the computer. Check the manufacturer's spec's on their website - that's another good way to find out. If it your computer supports 8x AGP, then upgrade it.
Geforce 6800 supports AGP 8x and PCIe 1.0. It will not support 4x.
Yes, at 4x speed.
Any 4x or 8x AGP card.
Bandwidth.
I'm sure it will, it will just run at 4X.
It may run, but with some problems. Performance may degrades. The card won't be damaged, though. If you already have the card, give it a try and run a bench mark. Mula I have a computer with an AGP card 1.0, that supports 1x/2x. Can I run higher cards that run at 8x or 4x, such as the Rosewell Radeon 9200SE. Right now I have a Voodoo3 3000. Yes it will, and it will run at 8x. The 1.5V only on the mother board means (not the old 3.3v AGP1 format) 8x AGP is only found with a .8v signal and therefor the fact that your main board supports 8xAGP means it can signal at .8v The 9800's spec's mean it can run at 8x AGP in any 8x agp main board and will run at 4x AGP in a main board that has a max AGP speed of 4x.
At the time of writing this (11/21/2009) it's the ATI HD4670 which is available in AGP 8x format will function perfectly fine in an AGP-4x motherboard.
All 8x AGP slots are backwards-compatible with 4x cards, so there is no reason you couldn't use a 4x card, except that it's slower. Most 8x cards should work in a 4x slot as well, but they won't be able to run at their full potential, and a few may have trouble running at a lower speed (NVIDIA cards should be fine).
http://cgi.ebay.co.uk/NVIDIA-GeForce-FX5500-256MB-AGP-8x-4x-Video-card-5500_W0QQitemZ190257585474QQcmdZViewItem?hash=item190257585474&_trkparms=72%3A1300%7C39%3A1%7C66%3A2%7C65%3A12%7C240%3A1318&_trksid=p3286.c0.m14 ^^ Is a 256mb graphics card that supports 4x and 8x AGP. One of the only cards above 64mb that I've ever seen that supports AGP 4x. http://cgi.ebay.co.uk/NVIDIA-GeForce-FX5500-256MB-AGP-8x-4x-Video-card-5500_W0QQitemZ190257585474QQcmdZViewItem?hash=item190257585474&_trkparms=72%3A1300%7C39%3A1%7C66%3A2%7C65%3A12%7C240%3A1318&_trksid=p3286.c0.m14 ^^ Is a 256mb graphics card that supports 4x and 8x AGP. One of the only cards above 64mb that I've ever seen that supports AGP 4x.
For the most part AGP 8x Cards WILL NOT work with a AGP 4x slot. The motherboard will only supply 1.5 volts of power to the card leaving the other half with no power and will not work properly.
The dimension 4550 motherboard supports up to 4x AGP according to spec. However, you can use an 8x AGP card as the specification is backwards compatible. It won't take advantage of 8x throughput but it should work just fine emulating 4x.
Yes, but the card will only register at 4x AGP. You will not get the most out of the card with that mobo, but will still have great results.