This project is evaluation-backed, not "works everywhere." The only
configuration a maintainer has verified end-to-end is listed as verified.
Everything else is honestly marked community (reported by a user, not re-run by
a maintainer) or unknown (not tested). Do not assume an unlisted combination
works — file a ROCm-compatibility issue with your rocm-smi / rocminfo output.
| GPU | gfx | ROCm | Backend | Status | Source |
|---|---|---|---|---|---|
| Radeon RX 7900 series (gfx1100, 48 GB ×4) | gfx1100 | 7.2 | llama.cpp (HIP, BF16 GGUF) | verified | full 1651-page run = 92.09; canary 93.33 |
| Radeon RX 7900 series (gfx1100) | gfx1100 | 7.2 | vLLM (Flash-Attn ViT) | verified (canary only) | canary 148 = 94.81; full-set invalid (server crashes) |
| Radeon RX 7900 series (gfx1100) | gfx1100 | 7.2 | transformers (SDPA ViT) | verified (canary only) | canary 148 = 94.11; full-set not run (~40 h) |
Stack details (torch/hip/transformers/vLLM) are pinned in
reproducibility.lock.yaml.
| GPU | gfx | ROCm | Backend | Status | Notes |
|---|---|---|---|---|---|
| RX 7900 XTX | gfx1100 | ? | llama.cpp | community | expected to work (same gfx1100); please report |
| RX 7900 XT / GRE | gfx1100 | ? | llama.cpp | unknown | same arch; untested |
| Other RDNA3 (gfx1101/1102/1150) | gfx110x/1150 | ? | any | unknown | not tested; ViT pixel cap may differ |
| RDNA2 / gfx103x | gfx103x | ? | any | unknown | not tested |
| CDNA (MI250/MI300) | gfx90a/942 | ? | any | unknown | not tested; different memory model |
| Minimum VRAM | — | — | — | unknown | not measured — do not assume a number |
- >14k ViT instability (transformers/ROCm SDPA path): a sharp threshold (~14,200 patches) on the tested gfx1100 stack; not pinned to a single SDPA kernel, no NVIDIA control. The llama.cpp C++ ViT is deterministic and uncapped. See ROCm/ROCm#6416.
- rocWMMA: the llama.cpp build uses rocWMMA FATTN on gfx1100; fall back to a
non-rocWMMA build (drop
-DGGML_HIP_ROCWMMA_FATTN=ON) if your stack lacks the headers.
If you verify a new combination, open an issue with the row + evidence and we will
promote it to verified.