NVIDIA takes more CPU than AMD

[robisescu]

I've benchmarked asus rx 480 8gb vs msi gtx 1060 6gb on i5-3340 machine and the gtx take about 10%-15% more cpu than rx 480 in fortnite (DX11) and rocket league (DX9). So is it true that nvidia loads more on cpu than amd?



monitoring tool: MSI Afterburner 4.5.0

i5 - 3340; 20GB RAM DDR3; Gigabyte b75 d3v; samsung evo 850;

nvidia driver 398.82; amd driver: adrenalin edition 18.8.1

Windows 8.1 Pro version 6.3; build 9600

• Fortnite 1920x1080 maximum settings

MSI GTX 1060 6GB: Framerate 79; CPU usage 88.9%; Gpu usage 89.44%; Gpu memory usage 2.7Gb; Gpu core clock 1.821; Gpu memory clock 2000; RAM usage 7.6 GB

Asus RX 480 8GB : Framerate 81; CPU usage 76.8%;; Gpu usage 95.68%; Gpu memory usage 3GB; Gpu core clock 1.169; Gpu memory clock 2000; RAM usage 6.9 GB

• Fortnite 3840x2160 maximum settings

MSI GTX 1060 6GB: Framerate 30; CPU usage 35.7%; Gpu usage 95.83%; Gpu memory usage 4.4Gb; Gpu core clock 1.770; Gpu memory clock 2000; RAM usage 7.0 GB

Asus RX 480 8GB : Framerate 22; CPU usage 28.8%; Gpu usage 97.76%; Gpu memory usage 5.3GB; Gpu core clock 1.115; Gpu memory clock 2000; RAM usage 7.2 GB

• Rocket league 1920x1080 maximum settings

MSI GTX 1060 6GB: Framerate 187; CPU usage 72.7%; Gpu usage 95%; Gpu memory usage 0.7Gb; Gpu core clock 1.846; Gpu memory clock 2000; RAM usage 5.2 GB

Asus RX 480 8GB : Framerate 190; CPU usage 62.6%; Gpu usage 93%; Gpu memory usage 0,8GB; Gpu core clock 1.266; Gpu memory clock 2000; RAM usage 4.9 GB

• Rocket league 3840x2160 maximum settings

MSI GTX 1060 6GB: Framerate 73; CPU usage 45.8%; Gpu usage 98%; Gpu memory usage 1.6Gb; Gpu core clock 1.845; Gpu memory clock 2000; RAM usage 4.6 GB

Asus RX 480 8GB : Framerate 68; CPU usage 41.1%; Gpu usage 98%; Gpu memory usage 1,3GB; Gpu core clock 1.162; Gpu memory clock 2000; RAM usage 4.6 GB

 

[clutchc]

That's because the GTX 1060 is a faster/stronger card than the RX-470. The CPU is working harder to keep up.

 

[robisescu]

That's because the GTX 1060 is a faster/stronger card than the RX-470. The CPU is working harder to keep up.

I don't think so, if you look at the framerates they are the same. And it's not an rx 470, it's an rx 480.
I think the difference in cpu load is due to driver kernels wich on nvidia apperently loads more tasks on cpu instead of gpu

 

[TerryLaze]

I don't think so, if you look at the framerates they are the same

That's correct and also very weird because at 4k the higher CPU usage does correlate with higher FPS,fortnite ~25% more cpu = ~25% more FPS and in rocket it's ~10%

So maybe there is some setting in maximum that causes something else to be bottlenecked causing the same FPS although the CPU could do more.

 

[robisescu]

Basically Nvidia driver uses more CPU due to software task scheduling rather than using AMD method of hardware scheduling... https://www.reddit.com/r/Amd/comments/9agxq3/nvidia_takes_more_cpu_than_amd/