ADT-R37 PCIe5.0x16 to 4-Port U.2/EDSFF Hard Disk Split Card 4x128Gbps 1 to 4 Expansion Adapter Compatible with Gen3/Gen4/Gen5 (R37D 5.0,to 4* E1.S/E3.S)

R37A: PCIe x16 to 4-Port U. 2 Hard Disk Split Adapter Expansion Card. Speed bandwidth Gen4 x16.
R37D: PCIe x16 to 4-Port E1. S/E3. S(SFF-TA-1002) Hard Disk Split Adapter Expansion Card. Speed bandwidth Gen5 x16. Please first check whether the motherboard split is set to x4x4x4x4, if set x8x8 or x8x4x4 can not recognize the four disks; secondly, please confirm whether the slot where the adapter card is located to support the PCIe x16 full-bandwidth operation, please refer to the motherboard manual. Support external power supply, external power supply protection, effectively avoid reverse current problems, to ensure the safety of the motherboard power supply
Indicator Lights: D1-D4 represent the hard disk read/write lights of port 1-4 respectively, they are blinking when reading/writing normally; D5 is the power indicator, the D5 light is always on when the product is in normal state.