Made using xCurio’s reBarUEFI.
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Applied on now lost beta BIOS 2.9 (latest on MSI’s website is 2.7 - but you can get 2.9 from here - thanks Koekieezz).
Applied several patches for Above 4G decoding, and enabled reBAR (checked with a 8 Gb GPU, fully addressed).
CPU is Core i5 4670K, with 16 Gb of system RAM, PCIe 3.0 x16 bus. USB 3 ports were tested to reach 5 Gbps after patch successfully.
Note that this has only been tested on Linux, but it does work.
Original UEFI BIOS image and patched + DSDT available on demand, or as soon as I’m not considered a new user…