Severe Performance Drop and Desktop UI Stuttering on RX 7600 XT with High VRAM Usage (ROCm on Ubuntu)

### What is the issue? Hi team, I’ve encountered a consistent issue when running Ollama on my AMD RX 7600 XT system using the ROCm amdgpu driver on Ubuntu. When the total combined VRAM usage (including model layers and system processes like the desktop compositor) exceeds ~90%, the system begins to exhibit significant display stuttering and occasional graphical artifacts. At the same time, Ollama’s inference throughput drops sharply — for example, from ~1.8 tokens/sec down to as low as 0.4 tokens/sec. This behavior does not occur on my RTX A4000 system under similar load and workflow, so it seems specific to how the ROCm amdgpu driver handles high VRAM pressure, rather than being a model-related issue. As noted in [this Reddit thread](https://www.reddit.com/r/linux_gaming/comments/1ccwxgy/comment/l18484p/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button), even approaching full VRAM usage on amdgpu systems can lead to serious system performance degradation. I’m not suggesting Ollama implement AMD-specific logic, but it may help to offer a user-configurable global VRAM margin, or a way to cap GPU layer offloading more conservatively, especially on systems that don’t gracefully handle high VRAM pressure. I’d be happy to provide additional system specs, logs, or even a video recording of the issue being reproduced if that would help. (I’d likely have to record externally using a smartphone, since a tool like OBS probably wouldn’t capture the stuttering and artifacts accurately.) Just wanted to raise this in case others running ROCm on Ubuntu are encountering similar problems. ### Relevant log output ```shell ``` ### OS Linux ### GPU AMD ### CPU AMD ### Ollama version 0.6.4