I just received a Dell R410 I got off Ebay.
It has an H700 in the PCI-e slot. No SAS 6/iR.
It has no backplane, there is an SFF 8087 (?) cable that splits into four combined sata + power connectors.
Booting the thing up shows :
Poweredge Expandable RAID Controller BIOS
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Firmware did not find valid NVDATA image. Please program valid NVDATA image and restart your system.
Press any key to continue