blub_blah

Since it seems that I have a similar issue I would like to know if you could solve it? My Macbook didn't restart but I also have a black screen!

Yes, I can boot without the eGPU. That's the only way to use Windows! I alread tried reinstalling the Intel drivers (even cleaned them with a driver cleaner tool). Actually I would love to install the Nvidia driver but since the sceen is always black when I attach the eGPU it won't happen. In the Nvidia forum are several customers with similar problems (Nvidia and Dell). They all have a GTX 970/980 and a lot are seeing black screens when booting into Windows. So it may be a bigger problem? Who is using a GTX 970 without any problems (what card)?

I tried your steps - even though I don't have an AKiTiO box. But still no luck. It's the same problem. As soon as I boot Windows with the eGPU plugged in my internal screen goes black (it's actually off) and the external does not get any signal .

So I bought a Sonnet EE III-D, a Y-Splitter and an EVGA GeForce GTX 970 SSC ACX 2.0. I already had a Windows 8.1 UEFI installation so I plugged it in and started the Macbook Pro 13" (Late 2013). I shortly see the Windows logo but then the internal screen goes black. Well that might be a good sign, since it detected the eGPU and switching to it?! Nevertheless I can't see anything. So I plugged in a TV via HDMI - still internal screen and TV black! I even tried an external display at work via DVI - no luck. Both screens are black. So next I started the Windows installation again via BootCamp from a USB stick. No luck either. I shortly see the Windows logo but when normally the little loading indicator appears under the logo the internal screen goes black (External Display is never active!). But, if I try to install Windows in non-UEFI mode (I just made a simple installation USB stick in Windows with a Microsoft tool) - BOOM - the internal screen is black BUT the external does now show the installation instructions. Next bummer, I can't install Windows from here because when I try to select any partition it says something about GPT (sorry don't know the exact phrasing anymore). I'm a little bit confused with this because it seems that UEFI mode is not working for me - but everyone on the internet () is saying that you NEED UEFI Windows for proper eGPU usage. In my case it seems the other way around? Just for clarification. My main OS on the Macbook is OS X (Yosemite) - which I installed first. I only installed Windows for gaming via BootCamp later (In Windows it says in msinfo32 that I'm using UEFI)! Did anyone have similar issues or does know what to do? I just don't get it why the external screen is never active (except the non-UEFI Windows installation!) Any help is much appreciated.

+1. I would also like to know. And does it matter which GTX 970/GTX 980 I use? Are there some vendors which work better with optimus than other?

Hey everyone, I'm planing to get an eGPU myself. I've read a lot on this forum but I'm still unsure what's the best solution for me. I'm travelling a lot with my MacBook Pro 13" (Late 2013) and I love gaming (e.g. Battlefield 3/4)! So I need a highly portable and compact solution (not so many cables + case) with no soldering and no cutting with a decent GPU (GTX 750 Ti might be too low) and internal display support (Optimus capable). I only need the eGPU to work in Windows (Bootcamp) and the price is not that important. I know that this is not really DIY but I hope you can still help me. I already have a few approaches, but since you all know more than me I would love to get some input from you: 1.) ViDock 4 ++ 320 Watt is enough for some really good graphic cards. I know the low performance of the ExpressCard-Thunderbold adapter. It is very compact but has a lot of loose stuff (cables, adapter, vidock) 2.) Sonnet Echo Express III-D 300 Watt is good but it's really expensive. I would buy it, but I've read that it doesn't support Optimus/internal display ... bummer. What about the Magma ExpressBox 3T or the NA211TB? Do they support Optimus/an internal display? 3.) Sonnet Echo Express SE II 80 Watt seems to be too low. It could power a GTX 750 Ti, but can I play games? Has anyone tried that? It's quite expensive but compact with a GTX 750 Ti. For that price the graphics power might be too low. I've read about the AKiTiO Thunder2 PCIe Box but the case seems to be too small (You need an extra powered PCIe expander...). So what do you think? Any recommendations? Kind regards blub_blah