AMD GPU
AMD Radeon RX 6800
The AMD Radeon RX 6800 has 16GB of VRAM and 512 GB/s of memory bandwidth. Its sweet spot tops out around gpt-oss-20b — the largest model that loads cleanly at a quality quant with llama.cpp at 8K context.
AMD verdicts are beta: fit is physics and holds, but ROCm/Vulkan speed tiers aren't calibrated yet — treat tiers as provisional until real measurements land.
- VRAM
- 16 GB
- Memory bandwidth
- 512 GB/s
- TDP
- 250 W
- MSRP
- $579
- Backends
- ROCm · Vulkan
Specs as of 2026-07-08 · source
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What an AMD Radeon RX 6800 can run
Every model we track, graded at its best clean-fit quant. Click any verdict for the full breakdown.
Verdicts computed from published specs and measured GGUF sizes — how the math works.