Varnim

http://www.pcisig.com/specifications/pciexpress/technical_library/dev_con_09_02/specifications/pciexpress/PCIExpress_SoftwareandConfigurationModel.pdf

http://egpu.maeth.net/help/compact.txt

Thanks, especially for the second link.

I've been trying out the DIY Setup 1.x tonight and ran into some issues with the PCI compaction. Is it supposed to take a long time to run? I get stuck at "setpci" and it just stands there blinking. Have waited for 5 minutes before shutting of the computer. Doesn't seem to matter what setting I change but always gets stuck here.

(If it matters I got a mid-2011 Macbook Air with 4GB and a i7-2677m trying to run a GTX 660 through a sonnet echo express card and a PE4L).

I want to understand the content off the pci.bat files a bit better. Is there any good source where I can read and learn more about them?

I just disabled iGPU in order to allow the egpu to populate into it's own MMIO range. You can do this through device manager. When you boot up with "error12", go into device manager, disable the broadcom wireless nic, the 2 high def audio devices, and disable the intel igpu. This will throw your display back to a 1024x768 basic display with no hardware acceleration. Once you reboot, check device manager. You've effectively given the gtx560 the first pick of available MMIO ranges.

The intel igpu, wireless nic, and audio devices have less requirements for consecutive MMIO address ranges since they occupy a narrower memory range. After reboot go and enable just the igpu. Then reboot again. You should now see the igpu and egpu working just fine. Optimus works as well as outputting to a second monitor. Go back and re-enable the wireless nic and audio devices. No reboot is required to get these to work.

Have anyone else succeeded with this solution?

I got the same MBA as borealiss (Macbook Air mid-2011, 4GB and i7-2677m) but tried with the Sonnet Echo Expresscard + PE4L solution and a GTX 660. Are there perhaps more things I can try to disable, or is the other graphic card the issue?