|"i have a amd 690v"|
That's the chipset, not the board model number. It would help to know exactly which board & which video card you're working with.
"my pci slot isn't showing my graphics card"
Are you asking about PCI or PCI-express? If it's PCIe, do you know which version PCIe slot your board has - 1.x, 2.0, etc? Do you know which PCIe version the video card is? PCIe 2.1 cards generally will not work in a 1.x slot. PCIe 2.0 cards should work. But as stated by phil22, your power supply needs to be capable of handling the load of the video card.
There's not much else we can tell you without knowing the make/model & specs of your board, card, & power supply.