U.2 compatible SFF-8643 Cables

[muhfugen]

Is it ok to use SAS3 (with sideband) SFF-8643 cables to connect a PCIe 4x <-> SFF-8643 board to a SuperMicro BPN-SAS3-826A-N4 backplane, which has SFF-8643 connectors for its NVMe bays? And if not, where can I find these mysterious U.2 compatible cables, ideally in 0.5m lengths?

 

[j_h_o]

Supermicro CBL-SAST-0957 55cm U.2 PCIE x4 SFF-8639 to MiniSAS HD SFF-8643 with Power Cable

 

[muhfugen]

Supermicro CBL-SAST-0957 55cm U.2 PCIE x4 SFF-8639 to MiniSAS HD SFF-8643 with Power Cable

Wont work. As I mentioned I need ones with SFF-8643 on each end to connect PCIe adapter to a backplane, rather than directly to a disk. With that said I did fine the ones i'm looking for on their site. Still curious if these are the same as normal 12g SAS cables with sideband.