paperblankets

I was able to make my setup stable (in windows) with a single GPU. It seems the cores were thrashing for bandwidth on the thunderbolt bus (could be the pci-e bus as well I suppose, but I doubt it). Now I am in this shitty situation where Mavericks tries to start both the cores, and fails. I am not 'nix savvy enough to figure out how to disable 1 of the cores. So the hardware never loads. Also I tried installing the Nvidia Driver Manager. I guess that is not kosher on 10.9.4+

Thanks for the information Tech Inferno Fan, I will possibly try implementing a single 690 core. But it sounds like my best bet will be grabbing a 780ti or wait for the new series of single cards to come out. I'm sure 2 cores each individually interacting with the bus oversaturates it. I will also make sure I am using bootstrap 5, I am very sure I am as i used the latest version as of a week ago. Edit: To my surprise, disabling a 690 core, and disabling my internal dedicated gpu is working great for an external gpu/external monitor.

I am having freezing as well, WITH a psu that meets my requirements. I am using the Echo SE II. My details are here: What have you tried for debugging?

Hi, I am new to techinferno, and am setting up my eGPU for the first time on the following hardware:Laptop: 2013 Macbook Pro 15 Iris GPU: EVGA Nvidia 690 Enclosure: Sonnet Echo Express SE II PSU: Seasonic SS-520FL 520W I have a standard Windows 8.1 bootcamp install (So I assume it is GPT edit *UEFI is what I intended to say here; as expected) Goals: Have Optimus enabled, and have external displays functioning via the 690. Silence (Hence the rad and fans) Issues so far: Following a cold boot as listed in the Optimus guide my rig boots up and sees the 690! It then crashes hard with no error. If I allow the reboot the 690 is not detected. If I power off, and start the machine again I am back to step one. I am reviewing the guides, but I don't really know where to go from here. Thanks for any links, help, insight, or general discussion you can provide! Power: My PSU is 4 amps over the recommendation for an Nvidia 690. The wattage is also above any peak the card will hit. I am using the paperclip method via a toggle switch. Device Manager: No errors when using the 690 with an external display. When using without an external display error 12 comes up on ONE of the two 690s. Photos so far on imgur Thanks for your time!

I am looking for help on a similar thunderbolt setup to those listed here: http://forum.techinferno.com/diy-e-gpu-projects/7621-egpu-configuration-hardware-bought-debugging-help.html#post104660 Thanks for your time!