Tim Weri

Dscjijn has referred you to some important threads to deal with this issue already. There is no mention in your last response of any followup to that recommendation. If I was to guestimate I'd say you have not read the Optimus guide, something that may be very beneficial in resolving your issue.

I did attempt the Optimus guide. I failed to overcome the grub 2 boot prompt. I left a reply asking for help from Evo but there hasn't been any answer that.

I didn't mention it because my setup doesnt even work with external display.

Yeah internal screen is a bit low compared with external display. This time score is 9225 NVIDIA GeForce GTX 970 video card benchmark result - Intel Core i5-2415M Processor,Apple Inc. Mac-94245B3640C91C81

Hi.

I have the exact same setup but somehow it's only working on my Yosemite. I use the Palit GTX 970.

I'm unable to get neither of the internal display nor the external display to work with the GTX 970 plugged in after installing the NVIDIA Driver.

I installed the NVIDIA driver using my internal display (the external display receives no signal from the start). My eGPU was obviously detected when I install the driver.

After installing the driver, both displays just boot to a black screen when I boot into Windows.

Do you have any idea how to fix this? I have tried reinstalling Windows 5-6 times already.

Thank you

You are still describing your problem/setup/what you already did, not very precisely.Maybe this will help: http://forum.techinferno.com/implementation-guides/8558-%5Bguide%5D-macbook-enabling-optimus-internal-lcd-mode.html#post110757Or my 15" Guide: http://forum.techinferno.com/implementation-guides/8571-%5Bguide%5D-2014-15-macbook-pro-iris-gtx970%4016gbps-tb2-akitio-thunder2-win8-1-a.html

Sorry for being vague.So I'm using a Palit GTX 970, connected to the Akitio Thunder2 with a powered molex riser. I'm not using the Akitio PSU at all, only my 500W PSU. I believe my hardware setup is correct because it works perfectly on Mac OS X Yosemite.

However it does not work for Windows 8.1. I followed the instructions and installed Windows 8.1 using Bootcamp. Updated everything. When I boot Windows with my eGPU plugged in, the internal display works but the external display receives no signal (before installing NVIDIA driver).Then I attempted to install the latest NVIDIA Driver for GTX 970 on my internal display with the eGPU plugged in. The NVIDIA Driver installer detects the GTX 970 and allows me to proceed with installing the driver. The driver was installed with no problems.

But when I reboot into Windows, both the internal and external displays are black. Tried to boot many times with eGPU plugged in before the chime booting sound. Same results.Tried to plug in the eGPU when I hear the booting sound. Same results.Tried to plug in the eGPU at the boot disk selection. Same results.Everything works normal with eGPU off.I tried to reinstall Windows many times but the same issue prevails.

Hi. I having problem with the Grub 2 boot prompt. If I understand correctly I am supposed to set the root partition to the EFI partition that we edited earlier(Which in my case is hd1,gpt1). However I am still unable to boot using Grub 2- still stuck with the boot prompt.

When I probe (hd1,gpt1) with

ls (hd1,gpt1)

I can only see

apple/ Grub/

Is there supposed to be Microsoft/

Thank you for your help

What?

Erm technically it's not working for Windows even with external display.

OK it's not working on Windows 8.1 even with external display. But it works for Mac OS X xD. It just boots up to a black screen on the internal display and no signal on the external display.

OK I woke up this morning and not only does it work for Windows, it's working on Yosemite too. I didn't manage to get it to work on Mac OS X last time. I just don't understand ...

Can you boot Windows without the eGPU. Plug in an power the eGPU when Windows is running and try to install the drivers.

Sadly it's still the same. If I'm not wrong bootcamp doesn't support hotplug for TB

Thank you anyway

- - - Updated - - -

I can confirm that my AKiTiO unit also does not receive any power from a powered riser, it only turns on when plugged in via its own power source. I've tried multiple risers.

I just tried the Akitio without its own power source today. Mac OS X detects it. But I'm not so sure about bootcamp.

I just upgraded my HDD to SSD. Reinstalled everything. Now I'm having trouble with installing the NVIDIA driver. It keeps saying that it cannot find any compatible hardware. I'm only using 1 PSU. The Akitio's light turn blue when I boot up my Macbook but I'm not sure if the card is really connected or not. Akitio box is detected in Mac OS X. Not sure about Windows.

PS: I downloaded the lastest driver v347.09

Alright, sounds good!

I tried method 2 today, but the gpu always crash when I enter games etc.

Is this because the akitio cant supply enough power? i get driver crash + bsod.

Same here with the GTX 970

Very frustrating

Hi

I managed to get my GTX 970 to work on Windows 8.1. However there's one issue: Windows crashes and restart whenever I boot up Battlefield 4. That was only on my internal screen. I'm able to test it on an ext display for now.

And I also tried to get it to work on OSX 10.10.1. I was able to get the card detected in Yosemite but failed to get ext display to work. So basically it's not working on OSX.

Any advice?

Thank you