NVIDIA Launches new 'VR SLI' Driver
NVIDIA just announced a new driver release (version 361.43) bringing compatibility with its latest Gameworks VR 1.1, which in turn brings with it multicast GPU acceleration for OpenGL applications.
The New Driver Handles Multiple GPUs for VR
The latest ‘Game Ready’ driver (361.43) is ready for download right now and ships with compatibility for the latest Gameworks VR 1.1 API suite, which includes a new OpenGL extension that allows those with multiple NVIDIA cards (with a SLI interconnect link) to render stereoscopic views utilising concurrent rendering grunt from both.
With stereo rendering, the GPU is required to render a viewpoint for each eye from different perspectives, an operation that’s ordinarily done sequentially, with one eye being rendered before moving on to the next. VR SLI and this new multicast extension apparently allows the same scene data to be uploaded to each GPU in a dual GPU setup, allowing those GPUs to render each viewpoint independently with a single trip made by the CPU to get the data there. Less CPU load, higher concurrency in theory means high frame-rates and lower latency with stereoscopic rendering, ideal for VR then.
For example, a dual NVIDIA board PC using Autodesk’s VRED Professional, a 3D visualisation package with virtual reality headset support, goes from 44 frames per second to 75 with the new driver. So, if you own a Gmaer PC with two graphic boards, it is time to upgrade before you receive your first Oculus Rift...