http://forums.macrumors.com/showthread.php?t=600322 but as suspected this is not a MXM or "PC Card" but an Apple proprietary card.
These are rare so I take it by asking you found one?
Can I replace the video card in my 2008, 24 inch imac, video card part #730-0481 B with a NEW 661-4426 Video Card ATI Radeon HD 2600 256MB for iMac (24-inch Mid 2007).
Will it fit? If not any suggestions?
Meet the drop-resistant Moto Z2 Force
The Moto Z2 Force is really thin, with a fast processor and great battery life. It can survive drops without shattering.