LM Studio ROCm outpaces Vulkan on AMD

Hot take: this looks like a backend-and-driver matchup, not a user error. LM Studio supports multiple llama.cpp runtimes, and on some AMD/Linux setups ROCm can absolutely outrun Vulkan when the driver stack and runtime version are in better shape.

• –LM Studio’s docs and release notes confirm it ships multiple runtime paths, including Vulkan and ROCm, so backend choice is a real performance lever
• –The Reddit reply already points at Linux being the likely reason, which fits AMD’s historically uneven Vulkan vs ROCm performance depending on OS and GPU
• –LM Studio has been actively updating ROCm support, including newer AMD GPU support on Linux, so runtime version mismatches can change results materially
• –Vulkan is often recommended as the safer compatibility fallback, but “safer” does not mean “faster” on every card or distro
• –The right comparison is same model, same quant, same context, same offload, same runtime build, same driver stack; otherwise tok/s numbers are easy to misread