I have two main boards from different mfr's and each has difficulty filling the last PCIe slot.
The last RX470 only works at 300Mhz GPU core and hashes about 4MH/s, and won't take settings from Wattman/Wattool.
In both cases, I tried a different card, riser, cable, and the same items work properly in another slot or MB.
I tried switching BIOS to PCI Gen2, re-flashing cards, re-installing from bare metal.
Any suggestions?
Background:
ASRock Z97 Anniversary
Celeron 1840
Windows 7 64bit
Sapphire RX470Nitro 4G
USB 3.0 Rev6 risers
ASRock Q1900M
Celeron J1900
Windows 7 64bit
Sapphire RX470Nitro 4G
USB 3.0 Rev6 risers
Thanks for looking this far.