Hello Shelltoe, Hardware: rMBP (early 2013) with 650M dedicated graphics, TB1; Sonnet III-D with MSI 760 ITX. I am running Windows 8.1 in EFI mode on an external SSD attached via a thunderbolt. I've been trying to get my graphics card working (right now it is listed in Windows with the dreaded code 12: not enough resources). I followed your instructions and added refind with startup.nsh. I am unclear if I need to list all bridges, the root bridge, or the bridge just prior to the video card. Originally Nando was trying to get me going with a MBR solution but I have a pretty complex pci bridge on my system and Setup 1.2/1.3 won't work. At first I copied your startup.nsh exactly and booted with eft-shell. The card was listed in the device manager but still had error code 12. Can you give me any advice since it seem you have a much better understanding of what's going on under the hood? Here is the trace of all of the pci bridges (windows won't load with this): Attempt 1: windows boots, GTX 760: error 12 (your initial startup.nsh) Attempt 2: windows boots, GTX 760: error 12 Attempt 3: windows boots, GTX 760: error 12 I picked up the Sonnet III-D used from eBay for less than the cost of the Akitio Thunder2 and the Dell power supply. Chassis was damaged but internals were fine. Seemed like an ok decision at the time but now I've read a couple of posts that indicate the complex PCI bridging on this device can cause issues. Thanks, Matt
