NVIDIA vs. AMD Linux Performance For GRID Autosport

[humbug]

Interesting how the performance doesn't seem to drop in any significant way (on the contrary I think I'm actually seeing an increase...) on the AMD cards when the resolution is tripled... What is holding these cards back?

This is often the case with AMD GPUs on Linux. It simply means the GPU hardware is not the bottleneck.
i.e. the powerful GPU hardware is being held back by drivers and/or CPU botteneck, It's also the reason you often see lower than expected power consumption on AMD GPU systems in Linux; because they are not working hard. Increasing the resolution only increases GPU load, no change in driver or CPU overhead. Since the GPU is not being worked hard anyway performance remains comparable. That's why you get predictable scaling with resolution in windows because the drivers are efficient so the GPU workload becomes the bottleneck.

On my R9 290 I remember when the Witcher 2 came out my GPU was not working hard at all despite low framerates. And then the situation gradually improved with game patches and driver updates.

[dungeon]

Interesting how the performance doesn't seem to drop in any significant way (on the contrary I think I'm actually seeing an increase...) on the AMD cards when the resolution is tripled... What is holding these cards back?

No profile holding it, as AMD blob is per app driver mostly It is not unusual that after AMD made profile for particular game, that game start to work several times faster.

There is CPU cap as usual, Michael should show CPU usage comparison during the game so you can clearly see it

[rabcor]

Interesting how the performance doesn't seem to drop in any significant way (on the contrary I think I'm actually seeing an increase...) on the AMD cards when the resolution is tripled... What is holding these cards back?

[xeekei]

You might want to hold off until the open source numbers come in:

https://www.gamingonlinux.com/articl...r7-370-4g.6354

That is very impressive. I'm looking forward to Arctic Islands.

[bridgman]

Days after days we get confirmation that AMD on linux worth nothing, i planned to upgrade some piece of my PC this christmas, the thing that i'm sure to buy is a NVIDIA graphics card

You might want to hold off until the open source numbers come in:

https://www.gamingonlinux.com/articles/grid-autosport-tested-on-r7-370-4g.6354

[artivision]

Nvidia GPU = No Async Compute = Obsolete.

[justmy2cents]

Hmm maybe I really should update my OS from my desktop pc then(kde mint maya so ubuntu 12.04). I have dual core G3258@4GHz and gtx750ti and I can't get over 30 on average on low settings at 1680x150@120Hz resolution.

don't know if these will help you anything. after you switch resolution restart the game. in some cases there is a bug where anything but started one completely underperforms. don't bother trying, just restart the game so it already starts at that resolution. at least for me game was stuck at VSYNC until i enabled and disabled it, until i did that i was somehow locked at 15, 30 or 60fps

there are only 3 settings that really impact performance as far as i saw: MSAA, ambient occlusion and enhanced lighting.

i7 810 (i think worse than yours cpu for this game since it doesn't really use multiple cores much), 750Ti, Fedora 22 (plain Gnome nothing modified) i get 65-70avg fps at 1080p everything on high except disabled lighting and MSAAx2 and this is with enabled fps counter in steam overlay

[Scellow]

Days after days we get confirmation that AMD on linux worth nothing, i planned to upgrade some piece of my PC this christmas, the thing that i'm sure to buy is a NVIDIA graphics card

[theriddick]

Yep, AMD better be sitting on a golden nugget with their miracle Vulkan drivers. Catalyst drivers really should be taken out back and have its skull stomped in!

[joni200]

AMD Catalyst is fun. The R9 Fury has under 4K Ultra more average-FPS (about 1) then under FullHD ^^