BOSS-S2 module. This module attaches to riser 1 on the R750 and adds support for dual redundant M.2 drives. 2 cables attach from the module to the motherboard. Below you can see it installed on riser 1:
Archives: Parts
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Power Cable For BOSS S2 Module 05HVX9
This is the cable that attaches from the BOSS module to the motherboard on the Dell PowerEdge R750.
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15 Gen 1U High Performance Heatsink 0YR04D
T style high performance 1U heatsink compatible with servers like the Dell PowerEdge R650, R750, and VxRail V670F.
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R750 24-Bay Front Controller SAS Cable 05407J
This is a short cable that runs from a front RAID/HBA controller to the motherboard. See this part for the other cable required to configure a front HBA or RAID controller on the R750 24 bay server.
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R750 24-Bay Front Controller SAS Cable 0N57F2
This is an internal Slim-SAS cable designed for the Dell PowerEdge R750 24 bay server. It’s a short run of cable to connect a front RAID/HBA controller to the backplane.
One end of the cable is labeled FCTRL_B. This end plugs into your RAID or HBA controller.
The other end is labeled EXP_DST_SB1 (Expander Destination Sideband 1) and plugs into the backplane.