P7H55-M PRO 'Above 4G Decoding'


I have a P7H55-M PRO with AMI BIOS version 1709 (latest), trying to use a PCIe device which requires 64-bit BAR.

Unfortunately as I have read on the web, the BIOS must support "Above 4G decoding" also known as "64-bit PCI decoding".

My BIOS does not have any such option, and the device is not properly initialized (in Linux lspci shows the 8GB BAR as unmapped, as expected with missing 4G decoding).

Is there any chance of modding this BIOS to enable 4G decoding?

Thanks in advance.

Hey, did you find a solution?
I have the exact same Situation with my Asus F2A-85-V.