| Better cooling | |
| Fan blows in over case keeps out dust | |
| Fan blows over CPU in proper motherboard | |
| More connectors | |
| More expansion slots | |
| Need ATX MotherBoards. |
| XT Style, old outdated | |
| AT Style Desktop | |
| AT Style Towers | |
| AT Mini and Mid Towers | |
| NLX, LPX | |
| Proprietary |