In GPT4All settings, selecting AMD graphics card yields no performance improvement over CPU

Background: This Nomic blog article from September 2023 promises better performance in GPT4All for AMD graphics card owners.

Run LLMs on Any GPU: GPT4All Universal GPU Support

Likewise on GPT4All's GitHub page.

September 18th, 2023: Nomic Vulkan launches supporting local LLM inference on NVIDIA and AMD GPUs.

Problem: In GPT4All, under Settings > Application Settings > Device, I've selected my AMD graphics card, but I'm seeing no improvement over CPU performance. In both cases (AMD graphics card or CPU), it crawls along at about 4-5 tokens per second. The interaction in the screenshot below took 174 seconds to generate the response.

Question: Do I have to use a specific model to benefit from this advancement? Do I need to install a different AMD driver? What steps can I take to troubleshoot this?

Sorry if this is an obvious question. Sometimes I feel like the answer is right in front of me, but I'm unsure of which key words from the documentation should jump out at me.

My system info:

• GPU: Radeon RX 6750 XT
• CPU: Ryzen 7 5800X3D processor
• RAM: 32 GB @ 3200 MHz
• OS: Linux Bazzite
• I've installed GPT4All as a flatpak