So I'm trying to get a 6950 to work with a x230 tablet, and all I get is "No drivers are installed for this device." in device manager (which, according to some, is Windows 8-speak for Code 12, insufficient resources - though, Windows 8 has given me Code 12 in specific cases). Additionally, on boot (or hotplug), Windows tends to be really laggy for a few minutes. What's really interesting about this is that the setup works fine with a GTX660 (since the BIOS does dynamic TOLUD, where PCI gets allocated the range starting at CFA00000 instead of DFA00000 with no eGPU present). However, using the 6950, the PCI address range also starts at DFA00000. Setup information: - OS: Windows 8 - 8GB RAM - Hardware: possibly the cheapest, hackiest, literally-DIY eGPU connector: DIY eGPU experiences - Page 763 (this may be a cause, especially if the AMD card interprets some signals differently than nVidia cards. But PCIe should be pretty standard...) Anyways, here are some things I've tried: - DSDT override (possible in Windows 8 by enabling testsigning in bcdedit). Gives a BSoD, even with no modifications (other than one to resolve a syntax error; I used the latest iASL from ACPICA for extraction and compilation). This would probably the ideal solution, but I've also heard others try DSDT mods on the x230 with similar (negative) results. Are there ways to debug this? - AMD DNA modded drivers. Difficult to find (scrounged up v11.10), and doesn't help. Also had to work around the amazingly annoying Windows 8 driver signature enforcement. - Both Gen1 and Automatic settings for Expresscard link speed. Automatic seems to get the BIOS to detect *something* (in my experience with the GTX660, when the machine "restarts" during BIOS POST, it's indicative of changing TOLUD), however, the PCIe memory range stays at DFA00000. - Connecting the GTX660 at POST, then hotplugging the 6950 from sleep (in the hopes that the hotplug would work with the GTX660 TOLUD settings). Same "No drivers are installed for this device" error. And some things I know that I should try, but haven't: - <4GB DRAM, but I don't have access to any small sticks at the moment. - Setup 1.x. The free version from way back when didn't work, and I'm reluctant to pay 4 times the cost of the PCIe connector for software which may or may not fix this problem. Additional questions: - Does anyone know if there are significant differences in PCIe memory / wiring requirements between the GTX660 and 6950? (also note: I've heard somewhere that the GTX660 has lower-than-usual memory requirements) - Is there a good way to debug a DSDT override? - Anyone else had similar experiences with similar hardware? - Anything else that might be worth trying? Thanks!
