1. Supports PCIe 4.0 X8 compatibility with Gen3/Gen4 2. Equipped with full-height and half-height baffles, it can be used in a wide range of environments 3. High-frequency, low-resistance, high-temperature and oxygen- PCB board, no deformation, yellow crystal color, semi-transparent, no whitening or blackening Product Model: R89M Product Name: PCIe 4.0 x8 to SFF-TA-1016(MCIO) Adapter Card Speed bandwidth: PCIe 4.0 x8 Operating temperature: -40 to 80 Flame retardant grade: 94V0 Can the R89M be split into two x4 channels? Sure, but the motherboard needs to support x4x4x4x4 splitting. In this way, after connecting the MCIO 1-to-2 cable, the x8 channel can be split into two x4 channels. Color: Black Material: PCB+Metal Package Contents: 1* PCIe 4.0 x8 to MCIO SFF-TA-1016 Adapter Card Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.