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Look at this -> GeForce GTX 980 PCI-Express Scaling | techPowerUp

Take a reasonable resolution like 1920x1080 and then have look at the charts. x1 2.0 isn't even on board, the lowest is x4 1.1 which equals x2 2.0 and this is set at 75%. So x1 2.0 is again lower than 75%. x4 2.0 which is TB2 rates 12% higher.

There will be an impact on the FPS. Maybe it won't be huge, maybe it will. This depends on the game as well.

As far as I know the Vidock products aren't cheap either so if there's the possibility to use Thunderbolt, use it.

Thanks, that's a lot of quality information!

Do you think it is possible to put together a DIY EGPU for travel purposes? Out of the box thunderbolt solutions for GTX980 proposed on this forum are 3-4kg+ without a card.

If there is a list of things I could put together to get gtx 980 running and close it in a case it would be awesome to hear it.

Since we don't have any way to compare it… no. But the fact is that the ViDock will only offer a fraction of the available bandwidth of TB2: http://forum.techinferno.com/enclosures-adapters/7939-rip-off-alert-thunderbolt-vidock-bizonbox-crippled-tb-ec-4gbps-units.html

I believe there is a line of defence on the vidock part about this particular thing Performance ([h=3]Concern#3: A Thunderbolt to ExpressCard Adapter should a bottleneck and thus the whole endeavor is futile)[/h]

And I say this is totally irrelevant, because it is also true that this bandwidth advantage of Thunderbolt does not translate into significantly faster 3D performance. As you read on, you will see that my Benchmark results are getting close to 3D Desktop Benchmark results and thus there is not much room Thunderbolt can improve upon, if at all.

Since you are obviously more experienced in the topic, could you say if benchmarks below prove anything from what he states above ? ?

Well it is an external power brick. Probably 12V. I don't think that we have any ViDock Users here…

All in all it weights less than the other setups with power supplies. But my q was about the performance.

Should I anticipate a significant performance drop over the transition ? One thing which is appealing about the vidock is the integrated power supply

From what I gather vidock nano will compromise the GTX980 because it needs Thunderbolt to ExpressCard adaptor. Am I right?

Hi Guys

I'm planning to put together a travel friendly egpu setup that could be connected to 2014 13" macbook pro.

There is a lot of vidock ripoff talk here (thanks btw, that was what I originally wanted to buy), so I ended up in the void. Could you help me with proposing a setup for:

- light weight

- preferably with an integrated power source (if not integrated than portable one)

- something that will take on GTX980

- something that can work well with macbook pro 13 retina internal screen ( don't care for mac os x, win 8/8.1 will suffice)

Cheers,

Peter