When the HTC Vive hit the market, one of the first complaints was that it wouldn’t run on a laptop using NVIDIA Optimus graphics with 9xx-M series GPUs (970M/980M). Optimus works by using an Intel IGP (Integrated Graphics Processor) to handle desktop rendering, and passes through the discrete GPU graphics to the screen for presentation with higher performance.
Unfortunately, this did not work for Direct Mode, which was implemented to significantly improve performance for standard GPU setups.
Fortunately, however, Valve has just updated SteamVR to look specifically for the dedicated GPU in the case of these laptops. In the July 5th change notes, the following entry was listed:
- Added Optimus hints to prefer dedicated GPU.
Intrigued (as I was unable to get the Vive to run from my MSI laptop previously), I gave it a shot, and sure enough, it works! (There was some unplugging and replugging, but it did work).
While the performance doesn’t stack up to a custom portable VR build, this is great for developers who may just need to do basic testing or proof-of-concept demos.
I hope this helps those of you who are in a similar situation.
The Vive will show up as an extra display. You need to switch it in windows to be an Extended display instead of mirrored, or SteamVR will send you angry messages.
Direct mode doesn’t work.
Some programs may not work. (Virtual Desktop did not work for me).
Performance is noticeably less than a desktop GPU.