As far as fit, you can get cards that aren't as long, ie 'mini' versions. You can get low profile versions, that aren't as tall. I'd check the end of the slot, on the opposite side from where you'd connect the monitor. Some cards can extend past the slot and if you have something close to the end of that slot it can block the card. Some motherboards might have SATA ports, hard drive enclosures, etc in that area.