Over 100% GPU usage when rendering very simple scene

[terabase-studios]

4.3.stable

I made a basic CSG box with 4 walls and a floor with shadows from the directional light turned off. I also have a player node but it has no meshes.

I get around 120%-190% GPU Usage. But I only have around 2.43% CPU Usage

I have a AMD Ryzen 5 7000 series with 4gb of memory.

Does anyone know what is causing the GPU to catch fire?

Project FPS: 36 (27.77 mspf)
GPU PROFILE (total 13.846ms):
-Render Depth Pre-Pass: 0.43764583269755ms
-Pre Opaque Render: 0.08781249324481ms
-Render Opaque Pass: 6.09354146321615ms
-Render Sky: 2.47383340199788ms
-Render 3D Transparent Pass: 0.10881248116493ms
-Tonemap: 4.35712560017904ms
-Glow: 3.0395622253418ms

[jesusemora]

@terabase-studios

I have a AMD Ryzen 5 7000 series with 4gb of memory.

your comp is just bad.
also CPU is for processing of data, like scripts and physics. GPU is for graphics.

@terabase-studios

what is causing the GPU to catch fire?

@terabase-studios

Project FPS: 36 (27.77 mspf)

that’s normal FPS for your (I imagine) integrated GPU.
it should tell you the GPU you have in the godot console. THAT is the information we need.

but from what you posted, 4 Gb is not even half of what is the minimum requirement to run windows 10.
and with an integrated GPU you use part of that as virtual memory.

@terabase-studios

Render Depth Pre-Pass: 0.43764583269755ms
-Pre Opaque Render: 0.08781249324481ms

you have transparent objects in the scene. everything transparent is expensive, except for maybe scissor/alpha clip, and that still has a cost.

@terabase-studios

CSG box

don’t use CSG for anything other than testing and prototyping. use actual 3D models.

@terabase-studios

Tonemap: 4.35712560017904ms

tonemap is also expensive. linear should be the cheapest, followed by reinhart/filmic, then the most expensive is ACES.

@terabase-studios

Glow: 3.0395622253418ms

you don’t always need glow, it depends on your scene and can be disabled.

you can also change many things in project settings to get better performance by sacrificing quality.

If you want better performance you need more memory and maybe an external GPU.

[dragonforge-dev]

Replace the CSG box with a StaticBody3D. See if that helps.

[tibaverus]

4 GB of memory these days is simply not enough, especially because integrated GPUs generally get a share of your RAM as their own memory.
Furthermore, I’m not sure which specific CPU you have (As the Ryzen 5 7000 series has multiple CPUs in it), but I imagine maybe it’s Integrated GPU is simply not powerful enough to handle modern graphical workloads.

[terabase-studios]

I have 8 GB of RAM if that is what you mean by memory. Though I am not trying anything “modern.” No shadows, just 4 walls, and a floor

[jesusemora]

we have told you, that isn’t enough and your GPU is bad.
Godot is a modern engine.

I couldn’t find specifics on the crysis 3 engine, but the recommended requirements are a radeon 5870, and comparing that with a vega 11 (IF you have an integrated GPU, you haven’t said anything yet), the 5870 is still 5% better.
and that is for a 10 year old game.
your comp would also struggle to run fortnite, if at all.

you can however, as I said, disable most of these advanced features of a modern engine in project settings and also set your materials to lambert, maybe phong instead of PBR GGX. but never completely, because they are integrated into the engine, because it’s designed around modern computers.

the INSANITY of modern computers, they can raytrace in real time. and they can now pathtrace in real time, and godot is not even at that level yet, but one generation behind, and your GPU is just not there.