Need some advice with a eGPU and VR.
 
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Need some advice with a eGPU and VR.  

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MRBM237
(@mrbm237)
New Member
Joined: 3 months ago
 

Thanks in advance for any help the eGPU thing is new to me. My laptop is plenty strong enough to run VR (Reverb G2 mostly for Iracing) but my biggest problem is my laptop does not have a display port, so I am stuck with a display port to usb-c adaptor that limits me to 60hz/60fps.It works but on the edge of usable and motion sickness. Im interested in your thoughts about running a eGPU so that I can run 90hz/90fps in VR.

Will it work well for a VR? Along with the display port the VR headset also has a usb-c that needs connecting and would that require a eGPU box to have a more than 1 Thunderbolt 3 connection on it or could I use the one on my laptop with the display port plugged into the eGPU? It would be terrible to have to disable the onboard RTX 2080 max Q but I need to get this thing better! Thanks for any help!!

Laptop Specs, 

MSI GS75 Stealth 

Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz

32GB (2x 16GB) DDR4 2666MHz | 512GB SSD

Graphics NVIDIA GeForce RTX2080 Super Max-Q, 8GB

I have a 4 lane true thunderbolt 3 40gbps connection and a seperate usb-c on the laptop.

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

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dhershberger
(@dhershberger)
Active Member
Joined: 4 years ago
 

@mrbm237

I also have a Reverb G2 and I use it with my Dell XPS 13 9310 and a Mantiz Saturn Pro II + RTX 3080. This combo, I find, works great. I am able to plug the Reverb's display port into the graphics card, and the USB connection into the eGPU's USB-A port. I use the USB-C to USB-A adapter which came with the Reverb, although I suppose I could use the Dell's USB-C.

Your computer's USB should be fine for this use-case, so if you purchased an eGPU I don't think it would need a USB port. I specifically wanted an eGPU with USB so I could output my audio when connected, and also use other peripherals when using the eGPU, such as a HOTAS controller when using Flight Simulator 2020. 

Hope this helps.

 

This post was modified 3 months ago

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

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Lycid
(@lycid)
Eminent Member
Joined: 2 years ago
 

I use my eGPU for VR. Was one of the reasons why I got an eGPU in the first place - works perfect. Yes, you plug the display port directly into the eGPU.

 

Keep in mind eGPU's really struggle with high FPS. Do not expect to play every game at 120hz on an index, even with a 3090 (what I have). But 90hz at a boosted resolution works perfect, for the most part. You'll never be able to hit the rock bottom frame times that desktops can (or even what a high end laptop card could), but you can coast at around 8-11ms pretty comfortably even if you crank up the resolution. eGPU's do particularly well at high resolution tasks and the performance on an eGPU is very consistent, despite having a lower ceiling before you reproject vs a desktop or a laptop card. Especially since thermal throttling is effectively solved with an eGPU, since your onboard GPU is no longer generating heat.

 

You'd want to at least hit a 3080 or a 3090 though to make it worth it if you already have a 2080 in your laptop... the performance benefit for the cost won't be worth it otherwise over your laptop. My 2080ti inside an eGPU did pretty good for most games but I still had to turn down settings or resolution in some cases, like a heavily modded Skyrim, VR Chat, or No Man's Sky (though NMS's VR optimization is absolute garbage). Games like boneworks occasionally chugged bad depending on the level. But other games like Paper Beast & Pavlov I could run fine even at 120hz with occasional reprojecting. Onward was middle of the road - I had to turn down my res to "only" 100% and play on medium settings. With my 3090 it's a LOT better but its no silver bullet. I still reproject down to 45hz in Skyrim when outside but I'm now running an enb graphic mod (notorious performance hog) and the frame times are so consistent that I don't even notice when I'm reprojecting.

 

If I had a TB4 laptop or icelake laptop, I'd likely get much better results (these architectures handle a straining eGPU connection much better), but perhaps not since the only laptops that qualify & are out now have much weaker CPU's (which VR also needs).

This post was modified 3 months ago

Laptop: Razer Blade Advanced 15" w/ GTX 2060, i7 8750H, 16GB RAM
eGPU: Razer Core x Chroma w/ 2080ti


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MRBM237
(@mrbm237)
New Member
Joined: 3 months ago
 

@lycid,@dhershberger , Thank you guys for the information! I decided to return the Reverb g2 and picked up an Samsung Odyssey as it has only HDMI and USB connectors. I will hang on this info should the next generation of VR require a Display port! maybe things will return to normal by then and manufacturing will return. Right now the prices are crazy if you can even find anything to buy. Thanks again!

 

 

 

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

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