Any idea what you did Frosty, I installed VER 14 yesterday, it was available all day, then I got Windows updates, then it disappears in svp 13 & ver 14?  I uninstalled the Win 10 updates, (Millenilum) but OFF is still the only option in preferences/video.  Changing FALSE to TRUE in INTERNALS makes no difference.

Fixed it.  Reinstalled the Nvidia Graphics card driver.

I have an old Gr card(signature) and I used to render with Sony AVC.
No difference with or without GPU (Cuda)
In Vegas Pro 14 for a test I used the Mainconcept AVC with Cuda.
Rendering 4 times faster compared to CPU only and even more than 10% faster than the fastest Sony AVC render.

Glad that's still working then for those who have the right type of GTX580-or-earlier card and know where the internal preference in VP14 is.

Glad I came across this thread. I don't care about any of the new features announced in Vegas Pro 14. The only thing I was desperate core was CUDA accelerated rendering support that worked with cards newer than a GTX580. If they've once again ignored the community's demand for that, I won't be spending any money to upgrade. Based on the new features list in 14, they added a bunch of stuff people generally weren't asking for and ignored almost everything people were asking for.

If you are using NVIDIA Maxwell-based GPUs or more recent models, try rolling back your driver to GeForce 337.88 or Quadro/Tesla 341.05 (an R340 driver) or older. These drivers can be found at: http://www.nvidia.com/Download/Find.aspx

If you are using NVIDIA Maxwell-based GPUs or more recent models, try rolling back your driver to GeForce 337.88 or Quadro/Tesla 341.05 (an R340 driver) or older. These drivers can be found at: http://www.nvidia.com/Download/Find.aspx

That is not a solution at all, because the cards we are talking about are not supported by these older drivers. For example, the 10 series cards are only supported by the 368.25 driver and newer. Also, rolling back a driver is a bad idea in general because it could mess up the performance of other software. I hope Magix will do a little bit more than putting this on their backlog because at this would be a deal-breaker for me and most like others with newer cards. I had no GPU acceleration in Sony Vegas 13 and had hoped for an improvement in that area. And to avoid misconceptions, NVidia cards support Open CL. I had an GTX 580 that provided GPU support for Vegas and the OpenCL support of newer NVidia cards has been improved.

So what are the newest cards that support the GeForce 337.88 and Quadro/Tesla 341.0 drivers?

Here are two devices we have in house and how far we had to roll back for each to be recognized by Vegas and Movie Studio apps. 

GeForce GTX 745 - driver version 368.69
GeForce GT 730 - driver version 369.09

As you can see, we did not have to roll too far back for these devices, but the current drivers were not recognized.  These are not as new as some of the models being posted here, however it appears we did not have to roll back as far as the FAQ stated. 

My test results:

Render test done comparing Sony Vegas pro 13 and Magix Vegas Pro 14
PC specs: Windows 10 x64, Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz Ram 16Gig Graphics Nvidia GTX980
Originals video files QuickTime Movie (.MOV) fps 25 data bitrate 46768 converting to 1920x1080 29.97fps max bps 50 000 000 Average bps 50 000 000 
Project length 4 minutes and 44 seconds, FX added Tv Similator, Glint and Bump map.

1.Sony AVC VP13 with GPU acceleration render time 23:49

2.Sony AVC VP13 without GPU acceleration render time 23:48
3.Sony AVC VP14 with GPU acceleration render time 20:27

4.Sony AVC VP14 without GPU acceleration render time 20:14

5.MainConcept AVC VP13 with GPU acceleration render time 20:17

6.MainConcept AVC VP13 without GPU acceleration render time 20:36

7.MainConcept AVC VP14 with GPU acceleration render time 19:39

8.MainConcept AVC VP14 without GPU acceleration render time 20:31
 

Does anyone have any experience with the NVIDIA GeForce GTX 980M and Vegas Pro 14? I have a nice fast laptop with 64GB of RAM and 8GB of GPU memory which I'm just drooling to put to some serious use, but this current upgrade offer isn't going to give me the performance I'm looking for without putting ALL of my hardware to use. 

UPDATE: I decided to buy the Pro 14 update anyway, and take my chances with GPU compatability. The good news is that Vegas Pro 14 identifies the GPU and works perfectly with the card and laptop as described above. The GPU monitor app says that Vegas is using the GPU, and even though my CPU usage still pegs at 100% during rendering, the 4K rendering performance is night and day compared to the non-GPU rendering of movie studio 13 platinum (which I upgraded from) on the same machine.  So far I'm quite happy with the Pro 14 upgrade and would recommend it to anyone using a high-end laptop with a NVIDIA GeForce GTX 980M.

Magix has recently taken over Sony Vegas, maybe we must not expect too much from them yet. Hopefully Vegas pro 15 has some awesome GPU render working by then. Unfortunatelly for me GPU render was a big expectation in Vegas pro 14. Dissapointed.

Im using Asus GTX 1080, Vegas version 13 is working fine with my graphic.  But V14 is really dissapointed, always render using my CPU and keep 100% omg.