1.5.3 Motherboard layout
1.5.4 Layout contents
Connectors/Jumpers/Slots/LED Page Connectors/Jumpers/Slots/LED Page
1. CPU, power, and chassis fan connectors
(4-pin CPU_FAN, 3-pin PWR_FAN, and 3-pin CHA_FAN)
1-28 9. Clear RTC RAM (3-pin CLRTC) 1-18
2. ATX power connectors (24-pin EATXPWR, 4-pin ATX12V) 1-22 10. Onboard LED (SB_PWR) 1-5
3. CPU Socket AM2+ 1-8 11. SATA connectors (7-pin SATA1, SATA2,
SATA3, SATA5, SATA6)
1-24
4. DDR2 DIMM slots 1-11 12. USB connectors (10-1 pin USB78, USB910,
USB1112)
1-26
5. LPT connector (26-1 pin LPT) 1-23 13. Digital audio connector (4-1 pin SPDIF_OUT) 1-27
6. Serial port connector (10-1 pin COM1) 1-24 14. Front panel audio connector (10-1 pin AAFP) 1-27
7. IDE connector (40-1 pin PRI_IDE) 1-23 15. Optical drive audio connector (4-pin CD) 1-26
8. System panel connector (20-8 pin PANEL) 1-25
ASUS M4A78-EM 1-7
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