rocessors
2. PWR_FAN 3-pin Power cooling fan connector
3. CPU_FAN 4-pin CPU cooling fan connector
4. DDR3_1~4 240-pin DDR3 Module slots
5. ATX_POWER Standard 24-pin ATX power connector
6. USB3F Front panel USB 3.0 header
7. ME_UNLOCK ME unlock header-for factory use only
8. SATA3_1/2 & SATA3~6 Serial ATA 6Gb/s connectors
9. CIR Consumer Infrared header
10. CASE CASE open header
11. F_PANEL Front panel switch/LED header
12. F_USB1~2 Front panel USB 2.0 headers (Gray header supports EZ Charger)
13. TPM Trusted platform module header
14. CLR_CMOS Clear CMOS jumper
15. LPT Parallel port header
16. SPK Speaker header
17. SPDIFO SPDIF out header
18. F_AUDIO Front panel audio header
19. COM Onboard serial port header
20. PCIE1~3 PCI Express x1 slots
21. PCIEX16 PCI Express Gen2 x16 slot for graphics interface
22. SYS_FAN 3-pin system cooling fan connector
23. ATX12V1 4-pin +12V power connector