Geometry 3D performance numbers with new flagship GPUs?

[rfurioso]

Now that there are some RTX 3080 GPUs in the wild soon to be joined by RX 6800 XT GPUs, has anyone had the opportunity to see if we can get better FPS for popular titles that support geometry 3D? My dusty old 1080 TI rig only sputters along at nauseatingly sub 30FPS with geometry 3d enabled. I’m lucky to get 15FPS in Kingdom Come: Deliverance. Any info will be appreciated! Many games really do look amazing in stereoscopic 3d immersive/cinema mode. I’d love to hear some feedback on how much difference a newer flagship GPU makes!

[steph12]

i’d like to know this as well.
from pascal to ampere, what’s the G3D performance jump ?

[Ralf]

I have a 3080 here since a little while. Even got it for the original price, just had to wait a month after ordering directly on launch day… Great GPU, I’d wait until the current price gouging stops though.

Overall personal impression: great for vorpX, largely overkill for monitor gaming.

That said: there is no simple one-size-fits-all answer to your question. A 3080 can improve framerate tremendously over a 1080 Ti whenever the GPU is the limiting factor, which is the case in many more graphically demanding (read: newer AAA) games with G3D. However, games can also be CPU limited. That can be the case e.g. for less demanding/older games, engines with unusually high draw call counts or some FullVR games where vorpX raises the camera field of view way above a game’s default to match the FOV of your headset. In a CPU limitied scenario framerate wouldn’t improve, instead you’d have more leeway for higher resolutions and/or maxed out detail settings, which is also nice.

On a sidenote: if you get numbers that low in Kingdom Come Deliverance with your rig, you either overdid it with graphics details/resolution or something is severely off. With a reasonable resolution (1200p selected on the DirectVR page of the vorpX menu) the game should run at 45fps without much of a problem on a 1080Ti using G3D.

[rfurioso]

Thanks for the reply Ralf. Oh yeah, for sure I set my resolution to high in KCD. I think I was attempting closer to the Index native. I’ll give 1200p a try. I’d still love to know what kind of resolutions can be achieved at reasonable framerates in KCD and other popular titles with that 3080.

[Ralf]

On a general note: when you want to play the latest, graphically intense games with G3D, cranking everything up to the max and choosing super high resolutions isn’t the best approach usually. The right balance between graphics fidelity and framerate is important for a good experience.

That said: you will certainly enjoy a 3080 (and upcoming similar GPUs) with vorpX. With G3D at fairly high 2240×1680 and default ingame graphics settings I get solid 50-70 fps in a typical location in KCD (checked around ‘Neuhof’). At the start location where you can look quite far above a village with people etc. still 40+, so all in all pretty much perfect for playing with smooth 45fps using FluidSync. Z3D provides super solid 90, of course.

That is with rendering to the headset and all DirectVR bells and whistles including a higher FOV, which (oviously) causes a higher workload than rendering with the game’s default FOV. For reference: raw vorpX stereo 3D performance (side by side image on desktop and default game FOV) is about 25% higher at the same resolution.

[Author]

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