There is no list that say's certain cards are PCI and others aren't. Some manufaturer's make one graphics card model in multiple slots. Phone your local Computer Store or Online Stores and find out if they have PCI Graphics Cards.
You need to be more specific...
yes
A pci and a pci-e are different ports. I would say no for sure. http://www.whatthetech.com/2007/11/10/can-pci-express-graphic-card-work-in-pci-slots/
Yes
No It wont even fit in the pci-e slot, but it is more than likely there will be regular PCI slots on the motherboard as well, use one of them then.
Any PCI Express card will work.
AGP is very old and crappy. PCI e is the newest graphics adapter interface.
No it cannot you will need to get a agp card or upgrade your motherbord.
From oldest to newestIntegrated, PCI, AGP, and PCI Express
yes definetely accessseble. but only on pci slots under express installer
GDDR3 is referring to the type of VRAM the graphics card has. If the graphics card is a pci-express one, then it can be installed into the motherboard if it has a pci-express slot available. DDR3 is referring to the type of Memory/RAM
If you have a monitor connected to your computer it means that you have at least one video card (either on-board or dedicated). Also you might want to check PCI (-X), AGP, and PCI-E ports for presence of video card.