luffy889

I managed to run compaction with eGPU PSU powered down. Error 12 is fixed! HOWEVER, as soon as I load eGPU system reboots itself. I suspect it could be power issue (PSU is more than enough though, Corsair 600w and eGPU is AMD R9 290) or my long TB cable (2m)

Guys, maybe someone can help me: I just don't understand why I can see my video card in rEFIt shell using "pci -i -b" command (PCI 0A 00 00 device, in the end of the list), but windows 8.1 EFI just doesn't even list/recognize AMD Radeon R9 290 (tried 6770 too) as a device no matter what I try?

Yeah, I've exhausted all options for compaction pretty much and checked devcon.txt too. I don't think MBR is the right way for me, right now I try EFI install of windows 8.1 update after installing Windows 8.1 in EFI: I just don't understand why I can see my video card in rEFIt shell using "pci -i -b" command, but windows 8.1 EFI just doesn't even list AMD Radeon as a device no matter what I try 0A 00 00 - AMD Radeon R9 290 but when windows boots - no such device exists!

iGPU is disabled in MBR mode. I also tried windows 8 in EFI mode, but it won't boot with eGPU connected. Right know I'm trying to install windows 8.1 in MBR mode and test it. - - - Updated - - - Will do as soon as I test windows 8.1 in MBR mode, like Tech Inferno Fan suggested

Hey guys! I'm struggling with error 12 in this setup: apple rMBP 15" 2012 + Sonnet Echo Express se Thunderbolt-to-PCIe + PCIe riser mod 8x to 16x + AMD Radeon R9 290 (have 6770 too) + win7 BIOS + nando's Setup 1.3 I know that some people were successful with 13" rMBP and Sonnet EEse, but looks like my 15" is a different beast. It has dGPU only (no iGPU!) in bios mode and all compaction methods fail! Any help would be appreciated! Thanks!