Uneven frametime distribution in multi-GPU systems - an illustration in slow motion

In this video I am giving an example how the so called micro-stuttering („Mikroruckeln") is impacting the perceived smoothness on a multi-GPU system. I am showing this at 30ish fps for illustration purposes but it occurs at every fps level, impacting the smoothness of the render output regardless of how high benchmarks showing the fps to be. Slow-Motion capturing of actual monitor ouput was done on a Casio Exilim EX-F1 in 512x384 pixels, 300 fps. So with a 10:1 higher capture rate, the non-existent synchronisation between camera an monitor should not play a decisive role.

• Category

  Science & Technology

[sermerlin1]

there's something really wrong with your brain if this jerkyness doesn't annoy the neurons in your brain...

[DGneoseeker1]

THIS is what all the fuss was about? I thought microstuttering would be something a lot more noticable in real time...

[TerracideDK]

I have a Titan myself, so I am sorry I have zero interest in "mom&dad" hardware

[DGneoseeker1]

Or I'm just used to it because really old games had such shitty frame rates and I'm used to playing those.

[zeke1337]

Dat ass

[x3n04ng3l]

I could be wrong but I think what is being shown is alternate frame rendering you can do this with any game, however most big game releases now come out with driver profiles from Nvidia or AMD that allows for both gpu's to render a single frame like you are talking about.

[Xelgand]

I like how we get to see Alyx's assets multiple times and in slow motion.

[labobo]

Doesn't this prove that multi-gpu system design doesn't work?

The rendering pipeline (directx, opengl) do not support multi-gpu design.

So GPU manufacturers cheat by how some TVs insert extrapolated frames to increase hz score. Which is overall bad for visuals.

Secondary gpu is basically a waste of money because it does redundant work that do not improve performance at all

Strange though,I thought every frame was split up so both gpus did one half of the frame.When did they change it to this?

[mutedname]

Can Nvidia's adaptive Vsync reduce it?

[mrmartial]

this is not the case on a 690. i guess technology is improving right.