Can the RTX 4070 SUPER Run gpt-oss-20b?
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Not entirely. gpt-oss-20b at MXFP4 is a 12.1 GB download (Hugging Face file listing for ggml-org/gpt-oss-20b-GGUF), about 0.1 GB more than the RTX 4070 SUPER's 12 GB, so the remainder has to be offloaded to system RAM. Generation speed is then set by system-memory and PCIe bandwidth rather than by the GPU, so no tokens-per-second figure is quoted for this pair. The smallest card in this matrix that holds it entirely is the RTX 4060 Ti 16GB (16 GB).
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Published runs for gpt-oss-20b on the RTX 4070 SUPER
No published run for this pair has passed the checks yet.
More about this pair
How much VRAM does gpt-oss-20b need?
The MXFP4 file is 12.1 GB. Add roughly 1.5 GB for the runtime and an ~8K-token context, so about 13.6 GB of VRAM holds it comfortably. Longer contexts grow the KV cache and need more.
What speed does gpt-oss-20b reach on the RTX 4070 SUPER?
No published run of gpt-oss-20b on the RTX 4070 SUPER has been cited yet. gpt-oss-20b is a mixture-of-experts model that reads about 2.08 GB of active weights per token, so the RTX 4070 SUPER's 504 GB/s of memory bandwidth puts the theoretical ceiling near 242 tokens per second once the whole model is resident. That is an upper bound, not a speed estimate: kernel, launch and compute overhead keep real runs below it.
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gpt-oss-20b on other GPUs
- RTX 4060 — Offload
- RTX 3060 Ti — Offload
- RTX 3060 12GB — Offload
- Intel Arc B580 — Offload
- RTX 4060 Ti 16GB — Runs, 63.2 tok/s (1 run)
- RTX 5060 Ti 16GB — Runs, 102 tok/s median
- Intel Arc A770 16GB — Runs
- Radeon RX 9070 XT — Runs, 91.9 tok/s (1 run)
- RTX 4070 Ti SUPER — Runs, 106 tok/s median
- RTX 4080 — Runs, 138 tok/s median
- RTX 5070 Ti — Runs, 156 tok/s (1 run)
- RTX 5080 — Runs, 190 tok/s (1 run)
- Tesla P40 24GB — Runs
- RTX 3090 — Runs
- Radeon RX 7900 XTX — Runs
- RTX 4090 — Runs
- RTX 5090 — Runs, 298 tok/s (1 run)
- RTX A6000 48GB — Runs
- RTX PRO 5000 Blackwell 48GB — Runs, 194 tok/s median
- Instinct MI210 64GB — Runs
- RTX PRO 6000 Blackwell 96GB — Runs
Other models on the RTX 4070 SUPER
- Llama 3.2 1B — Runs, 183 tok/s (1 run)
- Llama 3.2 3B — Runs
- Mistral 7B — Runs
- Qwen2.5 7B — Runs
- Llama 3.1 8B — Runs, 53.4 tok/s median
- DeepSeek-R1-Distill-Llama 8B — Runs
- Qwen3 8B — Runs, 56.2 tok/s median
- Gemma 2 9B — Runs
- Gemma 3 12B — Runs
- Qwen2.5 14B — Runs, 24.9 tok/s (1 run)
- DeepSeek-R1-Distill-Qwen 14B — Runs
- Qwen3 14B — Runs, 41.4 tok/s median
- Phi-4 14B — Runs
- Gemma 3 27B — Offload
- Gemma 2 27B — Offload
- Qwen3 30B-A3B — Offload
- Qwen3 32B — Offload
- Qwen2.5 32B — Offload
- DeepSeek-R1-Distill-Qwen 32B — Offload
- Qwen3 32B (Q6_K) — Offload
- Qwen2.5 32B (Q6_K) — Offload
- DeepSeek-R1-Distill-Qwen 32B (Q6_K) — Offload
- Gemma 3 27B (Q8_0) — Offload
- Llama 3.1 70B — Offload
- Llama 3.3 70B — Offload
- DeepSeek-R1-Distill-Llama 70B — Offload
How the checks work
The fit is the MXFP4 file size against the card's VRAM, with 1.5 GB kept for the runtime and an ~8K context. A published run counts only if the pair fits, the run is Q4-class, its source does not call it an estimate, it is under the bandwidth ceiling (memory bandwidth ÷ GB read per token: the whole file for a dense model, only the active experts' weights for a mixture-of-experts model such as gpt-oss-20b or Qwen3 30B-A3B, which is why those can post figures above bandwidth ÷ file size), it is not slower than the same card on a model twice its size, a single run is not slower than the same card on a larger dense model, and it is not one figure pasted across many cards. The whole matrix is downloadable as a CSV under CC BY 4.0.
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This page is editorial synthesis based on publicly available information. No independent first-party benchmarking is reported.