Different PC config 2 different perfomance outcomes

Unity Engine
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1

Hello everyone!

I was wondering if anyone can help me solve this problem I have. It started with Unity 6000.0.18f and is present in 6000.0.23f.

Vsync is turned off in the project settings and in a custom script.
The build is using DirectX11.

I have a build that runs smooth on my computer

GPU: RTX 3080 10G(Utilization 70-90%),
CPU: Ryzen 7 5800X (Utilization 20-45%)
RAM: 32G (Utilization 20-24%)
FPS: 80-100

but on the following specs i get almost the same results even though some of the PCs have different configs:

GPU: Gtx 1080 8G(Utilization 100%)
CPU: Ryzen 5 3600 (Utilization 50-70%)
RAM: 16G (Utilization 65-70%
FPS: 50-55

GPU: RTX 3060 12G(Utilization 100%)
CPU: Ryzen 5 3600(Utilization 40 - 70%)
RAM: 32G (Utilization 24-30%)
FPS: 53-57

GPU: RTX 4080 16G(Utilization 100%)
CPU: Intel 14700k(Utilization 20-40%)
RAM: 64G (Utilization 10-15%)
FPS: 50-57

GPU: 6900XT 16G(Utilization 100%)
CPU: Ryzen 7 5800x (Utilization 20-45%)
RAM: 32G (Utilization 24-30%)
FPS: 50-55

2

Check that all the Nvidia systems use the same (latest) graphics drivers.
Make sure as much as possible that there aren’t any background processes interfering (eg quit all tray apps, close all other applications).

Looks like you’re GPU bound. You may want to profile the build on your system vs the 4080 system - since the latter ought to be faster than yours, not slower.

3

I tested it on the RTX 3060 build with a development build and a non development build. There is no difference, profiler does not show anything noticable. The test i did on RTX 4080 was with 0 apps open and all components (CPU, GPU, SSD, RAM) on 1-5% and the next the test will be in 2 days sadly.

Why is my PC not struggling like the RTX 4080 or 6900XT PC since they both have more VRAM and yet they hit the max while my maximum is 85-90% GPU Utilization. I turned on

They have the latest Drivers installed, all except GTX 1080 which is giving the same performance as those 3 GPUs.

4

Try lowering the resolution scale to see if that changes anything.

To me behavior like that would imply a CPU issue not a GPU one.

Are you using texture streaming?

5

Changing the resolution scale does increase the performance

I am using texture streaming.

6

Really? Yet GPU utilization is still 100%?

Thats really strange…

7

It was strange from the start when only on my PC the build was running smoothly.

I will be doing a couple more tests tomorrow and on beefier PCs and on those already tested.

For now im just changing settings and making builds all day long.

8

The problem went away, dont know what was the cause…