I also have a coreboot KGPE-D16 but am using different accessory cards. I
took a look at the specs on your Hyper card and compared it to KGPE specs
and I think one or more of the following might be the issue:
* It looks like the Hyper card is a PCIE 3.0 device and the KGPE-D16 has
PCIE 2.0 slots.
* The Hyper card uses Intel VROC technology and I don't see that AMD cpus
have an equivalent/compatible technology.