Asrock x99 Extreme 4 Ver 3.1 Specification (link)

1. ASRock Super Alloy
   -XXL Aluminum Alloy Heatsink
   -Premium 60A Power Choke
   -Premium Memory Alloy Choke
   -Ultra Dual-N MOSFET (UDM)
   -Nichicon 12K Platinum Caps
   -Sapphire Black PCB
2. Supports Intel^® Core™ i7 and Xeon^® 18-Core Processors Family for the LGA 2011-3 Socket
3. X Series OC Socket, Digi Power, 12 Power Phase design
4. Supports Quad Channel DDR4 3200+(OC)
5. 3 PCIe 3.0 x16, 1 PCIe 2.0 x16, 1 PCIe 2.0 x1
6. Supports AMD 3-Way CrossFireX™ and NVIDIA^® 3-Way SLI™
7. 7.1 CH HD Audio (Realtek ALC1150 Audio Codec), Supports Purity Sound™ 2 & DTS Connect
8. Intel^® Gigabit LAN
9. 10 SATA3, 1 eSATA, 1 SATA Express, 1 Ultra M.2 (PCIe Gen3 x4 & SATA3)
10. 2 USB 3.1 10Gb/s (1 x Type-A + 1 x Type-C) (Supported by the bundled ASRock USB 3.1/A+C), 6 USB 3.0 (2 Front, 4 Rear), 8 USB 2.0 (4 Front, 4 Rear)
11. 1 COM Port Header, 1 TPM Header, 1 Thunderbolt™ AIC Connector
12. Supports ASRock HDD Saver Technology, Full Spike Protection, APP Shop