After testing the card in other systems at my disposal, I found one that would POST with it. Once booted, I decided to update the card's firmware to latest using mstflint. Swapped it back into the non-booting R7525, and behold, it POSTed. With the secondary PCIe board installed, the system correctly reads an available bandwidth of 200Gb/s.
Hi all, attempting to achieve 200Gb interconnect between a few R7525s. After installation, following the hardware maintenance guide on proper riser distribution, I am presented with "The system detected an exception during the UEFI pre-boot environment." during POST, where the system hangs. BIOS, Networking FW, iDRAC and LCC, are at latest versions. Any and all suggestions greatly appreciated.
R7525 and MCX654105A-HCAT