mal3x

Yes, it does work with the internal monitor (steps to get it working on the forum). To use an external monitor, use the preferred connection on the external video card. External monitor will give you a performance boost over internal monitor.

Does this model laptop have only the igpu? If not, the dgpu needs to be disabled before loading windows with setup 1.x.

PSU is definitely sufficient. Check your PM.

What is your PSU model? Using powered molex? Are you only getting black screen on OSX, or Windows as well?

Last thing I would say try a molex powered riser. If that does not work, no need to sell the thunderbolt adapter, you are better off selling the 780 ti and getting the 970 or 980. Both cards use under 200 Watt. I am running a short board 970 Zotac right now with no issues. Performance on par with the 780 SC ACX it replaced. Both the 970 and 980 can be powered by a DA-2 power brick. 3dmark11 run on laptop internal screen, no OC: NVIDIA GeForce GTX 970 video card benchmark result - Intel Core i7,Apple Inc. Mac-3CBD00234E554E41 - - - Updated - - - What video card are you running? *780 TI from your signature, so at least we can narrow the problem to cards using 300Watt of power. Aware of anyone running 780TI with no problems? Maybe different bios version/manufacturer? We can at least make a black list of problematic cards for future reference.

Mark, I see your PSU is not single rail, make sure to get power from different rails for the 6-8 pin, as well as the power for the thunderbolt adapter. The theoretical power limitations per rail for your psu are 12v x 24A, which is less than what your card needs. - - - Updated - - - My experience with the 290x was similar, it did not even matter if the card was under full load, it would crash at idle if I waited long enough. Works perfectly in my friend's desktop ever since I switched to Nvidia.

I've had this issue running a 290x, sound stutter, black screen. I was unable to get it to run, I ended up switching to a different card, but I always suspected power issues from pcie rail. Does your riser have auxiliary power input? If not, I suggest getting one with a molex connector, and run it that way. Also, make sure that the 6 Pin and 8 Pin power connectors are not piggy backed from the same line. I had a similar setup, 2013 Macbook (no 750M), Sonnet Echo Express Sel, EVGA 780 ACX SC (non-ti), and had zero issues. The 780 TI uses 90Watt more under full load.

Used my old PE4H v2.4a mini pcie connection and the card works. I guess the OWC Helios is not a good option for Thunderbolt vidock

Power supply is fine, I tested it with a desktop supply and same thing. Am I doing something wrong as far as the procedure for connecting the thunderbolt? I plug in the OWC before I turn it on, and the laptop boots up with no issues, but I only get PCI-PCI devices added in control panel and no unrecognized/vga devices.

Still no go. I am running Windows 8 64 UEFI, I'll try Windows 7 as well.

I will try that Frula, Thank you. I have pulled both pcb boards from the case, and I was planning on building my own.

My setup is as follows: HP Spectre XT Touchscreen - Thunderbolt port OWC Helios - found one for good price on ebay Nvidia GTX 770 The laptop recognizes the OWC as soon as I plug it in, but it will not recognize the video card at all. No unrecognized device, no video device, simply no change in device manager. I am powering the GTX 770 using the OWC power supply + an XBOX 360 203W power adapter . The VGA fans turn on as soon as I turn on the laptop. Any help is appreciated. Thank you.

Alright, so I guess it is faulty memory. I tried a higher voltage vbios, messed with the memory clock in afterburner. I noticed that changing the frequency it to a certain number clock results in no more artifacts for about 1 second lol. IS there any way to figure out exactly which ram chip is the problem? I am getting a refund from the seller, but I could offer a low ball amount of money and try to fix it up.

Ran 3dmark Vantage, graphics score of 21135, which is more in line with the rest of the 680m. Only problem are the artifacts in the first test only. What could be the cause? Thanks.

My Frankenstein seems to "work" both with the k5000m and 680m vbios. I installed Windows 7, Optimus enabled results in blue screen, but Optimus disabled allows me to install the 680m driver, without the Windows 8 error. Running 3dmark again.