Tragik

According to Review Asus G75V Notebook - NotebookCheck.net Reviews the Asus G75V has no iGPU. With no iGPU present, the NVidia driver won't allow driving the internal LCD or x1 pcie compression. So while you can still drive an external LCD I'd recommend you up your bandwidth to 10Gbps to get decent performance. Consider a Sonnet/OWC Helios native TB solution instead as shown at http://forum.techinferno.com/diy-e-gpu-projects/4570-%5Bguide%5D-2012-13-rmbp-gtx660-sonnet-echo-express-se-%40-10gbps.html . You can still use the Chung-gun/Ultramon method to move a windowed app running on a virtual external LCD to the internal LCD as a workaround.

Before going any further I recommend you peruse the following for an idea of performance differences between x1.2Opt, x2.2 (~native TB), x1.2 (what you'd get with your intended eGPU hardware solution):

http://forum.techinferno.com/diy-e-gpu-projects/2747-%5Bguide%5D-12-dell-e6230-gtx660%40x1-2opt-hd7870%40x1-2-pe4l-ec060a-2-1b.html#post37197

http://forum.techinferno.com/diy-e-gpu-projects/3062-%5Bguide%5D-2012-13-mbp-gtx660ti-hd7870%40x2-2-th05.html#post42483

An alternative would be to offload the G75VX and get a smaller more portable eGPU candidate system with an active iGPU, expresscard slot that is x1.2Opt capable. 12.5" HP 2570P meeting all those along with i7-quad CPU and RAID-0 storage upgradability making it a performance powerhouse. It's also available at a good ebay price. x1.2Opt is the best bang-per-buck at this time.

eg: consider an expresscard pci-e 2.0 eGPU implementation costs substantially less than a native Thunderbolt one. You're up for US$92-shipped for a expresscard PE4L-EC060A 2.1b versus US$310+TBcable+shipping for a OWC Helios Thunderbolt-to-pcie enclosure.

Man thank you very much for your response and all the other posts you have made with info and tips!

I am going to have to weight my decisions here it seems. Don't mind the Sonnet/Helios option, just pricey. I wish I would have been on the ball and got a TH05 when you could still...come on Silverstone!

The PE4L to Sonnet TB Adapter attracted me just because the price was a little less and from looking at your links the performance difference isn't all that big (in DX9, looks like the gap widens DX10 up). Mainly looking at the FFXIV benchmark since I have used it and play it, very nice to see the performance you got with it. Was just going to build a nice little enclosure, pop a GTX 770 in it and giver. May have to look at just getting rid of this laptop and getting the one you mentioned in your response.

Well I will have to ponder on this, once again thank you!

Hello!

I have been looking at getting an EGPU solution for a while now and have settled on a PE4L + Sonnet TB adapter for my Asus G75VX. Right before submitting the order I decided to just double check the pre-purchase guide and this kind of got me worried. "If the system has a dGPU then ensure it's switchable with the Intel 4500MHD/HD/HD3000/HD4000 providing primary video if you want to do a higher performance Optimus x1.Opt setup with allows accelerated graphics to the internal LCD as well as an external LCD."

From the previous couple posts I see that you can switch the GPU through the BIOS. From my understanding though my Asus will not be able to do this due to Asus locking the bios and something to do with the iGPU being locked for 3d (I might be entirely wrong about this. If so I apologize been reading to much info and might be getting stuff confused)

So I guess my question is: To get an EGPU to work would I just be able to disable the dGPU from the device manager, plug my eGPU in and use an external monitor from the card? Would that just mean that I would not get Optimus support? Would the lack of Optimus render this a waste?

Thank you for your time and for all the people contributing to this thread, been learning a lot. I hope this hasn't been talked about earlier, tried looking and couldn't find anything.