1. CPU Socket 1151 10. M.2 Socket 3 Key-M 80mm 19. USB 2.0 Headers
2. Intel Z370 PCH (Southbridge) 11. PCI-E Slot x16/x8 20. Front Panel Audio Connector
3. PWM Fan Header (1 amp) 12. PCI-E Slot x8 21. Front Panel Connectors
4. DDR4 Memory DIMM Slots 1-2 13. PCI-E Slot x4 22. BIOS Select Switch
5. 24-pin ATX power connector 14. RGB LED Controller Header 23. CMOS Battery
6. 8-pin EPS Connector 15. Power Button 24. PC Speaker
7. 4-pin ATX Connector 16. Reset Button 25. Rear Panel Connectors (Figure 2)
8. Supplemental PCI-E 6-pin Power 17. Debug LED / CPU Temp
9. Intel Sata 6G Ports 18. USB 3.0 Headers