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Hi, Used this great resource to build a eGPU based on a EVGA GeForce GTX 980 Ti Hybrid 6GB with a HighPoint RocketStor 6361A Thunderbolt 2 PCIe Expansion Chassis, Silverstone Milo ML08B-H Mini ITX Case with Handle, and Silverstone SX500-LG 500W Gold SFX Power Supply. My eGPU requirements are solely for daVinci Resolve on OS X to boost render times and size of files that can be rendered without the dreaded GPU Is Full message. No gaming, no monitor. Can’t get any simpler. The eGPU is to run on either a MacBook Pro Retina, 15in Mid 2015, AMD Radeon R9 M370X, and a iMac 27in Late 2013, Nvidia GeForce GTX 780M. Did a quick bride of Frankenstein build on the table to check it all works using the MacBook Pro. Downloaded the Nvidia Web Driver (346.02.03f04), downloaded and ran goalque’s installation script https://www.techinferno.com/index.php?/forums/topic/7989-script-automating-the-installation-of-egpu-on-os-x-inc-display-output/. Rebooted the laptop and there was the 980 ti in the OS X systems report. Ran Resolve and it recognised the card and rendered at approx 3 times the speed of the non eGPU render. Sweet! Spent a day doing the build, with loads of pics which I’ll post here soon. Carried the eGPU over to the iMac, plugged it in and went through the process again. Downloaded the Nvidia Web Driver (346.01.02f04)*, ran the script, rebooted the machine. In the systems report there is a new card recognised, but it has the generic name of NVIDIA Graphics Device. In Resolve it recognises the card as NVIDIA Graphics Device. I rendered the same file. On the Laptop I was getting 10fps, on the iMac I get roughly 7.5. Both systems were reading and rendering to the same external SSD and the CPU wasn’t being taxed. Hmmmm. So I search the site for NVIDIA Graphics Device and found a few post relating to Titan builds, but they are reporting expected performance. Again Hmmm. So my next step is to upgrade the iMac from 10.10.3 to 10.10.5 to match the MacBook Pro. I will also update the NVIDIA Web Driver as at the moment they are both up to date base on the OS X but do not match. I can’t find anything relating to 10.10.3 and NVIDIA Graphics Device but its the only obvious difference between the two systems. I’ll post my findings soon. Any thoughts? Cheers