| Model | 
| Model | – JNAF791-C246 | 
| Part Number | – JNAF791-C246 | 
| Form Factor | 
| Dimensions | – ATX (305 * 244mm) | 
| Processor System | 
| CPU Generation | – Intel® LGA1151 Gen 8 Coffee Lake Processor (Max. 95W TDP) | 
| CPU SKU | – Xeon E, Core i7/i5/i3, Pentium, Celeron | 
| Core Number | – (by CPU) | 
| Max Speed | – (by CPU) | 
| L2 Cache | – (by CPU) | 
| Chipset | – C246 | 
| BIOS | – AMI Flash ROM | 
| Expansion Slot | 
| PCI | – 2 | 
| PCIe | – 1 * PCIe x1, 1 * PCIe x4, 2 * PCIe x16. Support NVMe * Note: there are two configurations if plug one PCIe x16 card in one slot, the other slot is disable; or plug one PCIe x8 card in one slot, the other slot is able to plug one PCIe x8/x4/x1 card
 | 
| M.2 (E-key) | – 1 (E-key, 2230) | 
| M.2 (M-key) | – 1 (PCIex4 with SATA interface, M-key support NVMe, 2242/2260/2280/22110) | 
| SIM Card Holder | – 0 | 
| Memory | 
| Technology | – DDR4 2666MHz Dual CH SDRAM W/ECC | 
| Max. | – 128GB | 
| Socket | – 4 * U-DIMM | 
| Graphics | 
| Controller | – Intel® HD Graphics | 
| VRAM | – Shared Memory | 
| VGA | – 1 (Max. Resolution: 1920×1080@60Hz) | 
| HDMI 1.4 | – 1 (Max. Resolution: 4096×2160@30Hz) | 
| DVI-D | – 1 (Max. Resolution: 1920×1200@60Hz) | 
| DisplayPort | – 1 (Max. Resolution: 4096×2304@60Hz) | 
| Multi Display | – Triple Displays | 
| Ethernet | 
| Ethernet | – 10/100/1000 Mbps | 
| Controller | – 2 * Intel GbE (1 * i219LM, 1 * i210AT)
 | 
| Connector | – 2 * RJ45 | 
| Audio | 
| CODEC | – HD Audio : REALTEK® ALC888S | 
| Channel | – 6 Channel | 
| SATA | 
| Max Data Transfer Rate | – 5 * SATAIII support RAID 0, 1, 5, 10 | 
| Rear I/O | 
| VGA | – 1 | 
| DVI-D | – 1 | 
| HDMI | – 1 | 
| DisplayPort | – 1 | 
| Ethernet | – 2 | 
| USB | – 4 * USB 3.1 (Gen. 2) & 2 * USB3.1 (Gen. 1) | 
| Audio | – 3 (Line-In, Line-Out, MIC) | 
| Serial | – 1 (COM1 support RS232/422/485) | 
| Internal Connector | 
| USB | – 2 * USB3.1 (Gen. 1), 4 * USB 2.0 | 
| PS/2 | – 1 | 
| Serial | – 9 (COM2 support RS232/422/485) | 
| SATA | – 5 * SATAIII | 
| M.2 (E-key) | – 1 (E-key, 2230) | 
| M.2 (M-key) | – 1 (PCIex4 with SATA interface, M-key support NVMe, 2242/2260/2280/22110) | 
| GPIO | – 1 (8 bit) | 
| Chassis intrusion | – 1 | 
| Audio Header | – 1 | 
| SMBUS | – 1 | 
| AT mode | – 1 | 
| TPM | – 1 (on board option) | 
| Watchdog Timer | 
| Output | – From Super I/O to drag RESETCON# | 
| Interval | – 256 segments (10sec ~ 255min) | 
| Power Requirements | 
| Input PWR | – ATX PWR (8+24 pin) | 
| Power On | AT/ATX Supported – AT : Directly PWR on as Power input ready
 – ATX : Press Button to PWR on after Power input ready
 | 
| Certifications | 
| Certifications | – CE, FCC, LVD, RoHS, REACH | 
| Environment | 
| Temperature | – Operating: 0°C ~ 60°C | 
| – Storage: -20°C ~ 85°C | 
| – Humidity: 10% ~ 90% RH @40°C (non-condensing) |