How do I know which graphics card will support my motherboard?
Do all graphics cards fit?
Checking Basic Graphics Card Compatibility
Almost all modern computers use PCI Express 3.0 slots, which means a video card can go into any open slot. If your computer uses PCI Express 2.0 or another version of PCI Express, a newer card should be backward-compatible with it.
How do I know if a graphics card is compatible with my CPU?
Just find out if the card/motherboard is supporting either PCIe x8 or x16 interface. In your case, it is more likely compatibility between motherboard and GPU compatibility, not CPU. If you go higher end, with large number of GPU, then it is more like Xeon as better than i7 or AMD.
How do I find out my graphics card size?
In the Display Settings box, select Advanced Display Settings and then choose the Display Adapter properties option. On the Adapter tab in the box, you should see the brand of the graphics card and its memory amount listed.