Features: brand new and high quality Innovative design, convert 1x pcie directly to usb3.0 interface, reduce intermediate transmission links, reduce costs, reduce signal. attenuation and make long-term continuous work more stable Upgrade to for hdmi compliant high definition display interface, convenient and practical. Support for 6th and 7th generation cpus core, lga1151 is easy to use, low cost, low investment and efficient mining. This product uses high quality materials, is durable, has a long service life, and is firm and stable in use. 12 usb3.0 ports expansion, plug and for play, convenient and hassle-free. Specifications: Processor: supports all lga1151 series processors Chipset: using for b250 high speed chipset Memory: 2xddr4 dimm memory slot, support 2133/2400mhz memory, maximum support 16gb Display chip: integrated for hd graphics core graphics card Display output: for hdmi/12 x usb3.0 to PCI-E16X Network: 1 x rtl8111f gigabit ethernet chip Storage: 4x sata hard disk interface Audio: onboard alc662 6-channel hi-fi audio controller I/O interface: 2x USB3.0 interface; 4x usb2.0 interface; 1xHDMI-compatible interface; 1x rj45 gigabit network interface; 1x3 in 1 audio interface; 1 x ps/2 ratio Built-in i/o interface: 1x USB3.0 pin; 2x USB2.0 pin; 1 x pin with; 1 x front audio pin; 1 x F-PANEL front panel function button and needle plug indicator Bios: ami 64mb flash rom Power supply type: support atx24p + atx4p, 12v + atx6p Size: approx. 230x175mm/9.06x6.89in Material: P C B Color :Black Note: Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. Monitors are not calibrated same, item color displayed in photos may look slightly different from the actual item. Package includes: (A/B/C/D/E optional) A: 1PC x Motherboard 1PC x G3900 CPU B: 1PC x Motherboard 1PC x G3900 CPU 2PCs x 4G DDR4 2133mhz Memory Module C: 1PC x Motherboard 1PC x G3900 CPU 2PCs x 8G DDR4 2133mhz Memory Module D:1PC x Motherboard 1PC x 4G DDR4 2133mhz Memory Module E:1PC x Motherboard 1PC x 8G DDR4 2133mhz Memory Module