The Accellerated Graphics Port card uses memory completely separate from the motherboard memory. They don't mix. Make sure you use the memory that the AGP card nees in the AGP card, and memory that the motheroboard needs in the motherboard. If you do that, everything will be ok.
No, We Can't.
Yes, it is. Just make sure that your motherboard has a port that supports the video card you want to get.
Physical size of the memory card. Mobile sdram is smaller than sdram for desktops.
Graphics cards connect to the computer only through the connectors present on the motherboard so an external graphics card is unfortunately not an option. You can always switch your video card entirely, but be sure to check if the motherboard you have supports it.
It supports ddr (first generation - ddr1).
Of course, as long as the new motherboard supports it.
Harddrives will work as long as the motherboard supports the interface. SATA requires SATA. IDE requires an IDE port. Ram may or may not, that depends on the motherboard and if it supports the speed of your ram. USB drives should be fine. I'm not sure of the use of a memory card for computers...
Yes you can use an ati video card in a sli motherboard, however you cannot put two ati graphics cards in that motherboard and run them in sli. As far as putting one in and just running it single your ok. You would need a motherboard that supports Crossfire to run two ati graphics cards together.
Yes, a GDDR5 graphics card can be compatible with a Sabertooth 990FX motherboard, provided that the graphics card uses a PCIe interface, which the motherboard supports. The Sabertooth 990FX typically has PCIe x16 slots suitable for modern graphics cards. However, ensure that your power supply meets the requirements for the specific graphics card you intend to use.
Yes, it is possible to have dual monitor output using one DVI port on a graphics card and another from the motherboard, but it depends on your system's configuration. If your CPU has integrated graphics and the motherboard supports it, you can enable both outputs in the BIOS/UEFI settings. However, this setup may not provide optimal performance for graphics-intensive tasks, as the monitors would be using different graphics sources. Always check compatibility and settings for your specific hardware.
SLI is not in the graphics card SLI is running two or more of the same graphics cards at the same time to increase the performance but you need a power supply and a motherboard that supports it
Get a new motherboard or a new graphics card.