Supermicro proprietary PCIe risers compatibility? can they split? e. g. x16 -> x8+x8

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neuen

New Member
Apr 23, 2020
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Hello,

I hope you are well.

I'm looking for a GPU riser for a proprietary PCIe 3.0 x16 slot on the X10DRG-HT (pictured on the top left).

From the Riser Card Matrix, I deduce one of the following is physically compatible with the slot:
- RSC-R1UW-2E16 - x16 + x16 output
- RSC-R1UW-E16 - x16
- RSC-R2UW-2E8E16 - x16 as x16 + x8 as x16 + x8 as x16, thermal sensor
- RSC-R2UW-2E8E16+ - x16 as x16 + x8 as x16 + x8 as x8, thermal sensor
- RSC-W2-66 - x16 + x16, thermal sensor
- RSC-W2-66G4 - x16 + x16, thermal sensor, PCIe 4.0 supported (though MB does not)
- RSC-W2-688G4 - x16 + x8 + x8, thermal sensor, PCIe 4.0 supported
- RSC-W2-8888G4 - x8 + x8 + x8 + x8, thermal sensor, PCIe 4.0 supported

Are there any noteworthy risers not mentioned on the matrix? Are all of these compatible with the MB (don't worry about the case)?

I understand MB provides one x16 input to the riser. What would happen if the riser advertises two x16 signal outputs (e. g. RSC-R1UW-2E16 - it is mentioned in the MB manual as the example of the riser to use for this slot) and one connects two x16 signal devices (e. g. two GPUs)? Will it split x8+x8 or x16+x0? I'm leaning towards buying RSC-R2UW-2E8E16+ as the seller I had a positive experience with previously has it. Yet I wonder how three slots on the riser would behave when I install one x16 signal device.

Will the thermal sensor work with my MB, or there is no sense in overpaying for it?

Please, help me understand. :/

Thank you in advance!
 
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