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.
Bandwidth.
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).
If you have an Agpx8 compatible motherboard you will be able to utilize an agpx8 video card if your mother board only goes to 4x then the 8x graphics card will automatically use the 4x setting 8x meaning more information/data being sent is always better .Agpx4 card will work on x8 slot
No it won't work!
8x video card will work on motherboard supporting only 4x speed,but will be limited to 4x mod.
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.
AnswerYes.Added:Sometimes! Not all AGP 1x or 2x video cards will have the same connection type as 4x or 8x cards, some older cards will not physically fit in the slot for modern motherboards.
AGP (accelerated graphics port) slots are special slots on the motherboard specifically designed to take a graphics card (or video card as they're often called).In recent years AGP has been replaced by the PCI-express standard (or PCI-e as they are often referred to) and thus AGP is generally considered an obsolete format. Even so, AGP hardware is still available, but often at an increased cost & with decreased performance.AGP slots came in a few different speeds. The most common of which was 4X and 8X slots. 8X slots could utilize higher performance 8X cards. A 4X slot is limited to only 4X cards. However, many 8X cards have the capability to be used in a 4X slot, this will usually be denoted in the specifications of the card.
The type of memory used by the graphics card. DDR1 is slower, DDR2 is faster. They both plug into the same slot in your computer.
Any 4x or 8x AGP card.
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.
It will work, if it is compatible with the signalling voltage on the motherboard (1.5v for AGP 1x, 2x and 4x), but it will only work at up to the 4x that your motherboard is capable of. You may need to change your BIOS settings for AGP= 4x to obtain maximum performance from your motherboard and graphics card. AGP 8x cards run at 0.8v but some may permit 1.5v 4x compatibility. Those folks experiencing problems with 8x cards in 4x slots might consider the possibility of power supply issues. It's not unusual to see newer cards requiring 300-350 watt power supplies with specific voltages requiring up to 18 amps. Many old Dells and others have only 250 watt supplies, and the new dual gizmo gazillion megahertz screamers take a lot more juice than the factory-supplied cards. Some 8x cards are designed to be able to clock down to 4x, some are not. Many times it will say whether or not this is possible right on the box. In all respects the motherboard or 8x card should not be damaged by attempting this, the worst that will happen is it wont work. == == == == == ==