Can the RTX 5080 Run Llama 3.1 70B?
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Not entirely. Llama 3.1 70B at Q4_K_M is a 42.5 GB download (Hugging Face file listing for bartowski/Meta-Llama-3.1-70B-Instruct-GGUF), about 26.5 GB more than the RTX 5080's 16 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 A6000 48GB (48 GB).
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Published runs for Llama 3.1 70B on the RTX 5080
No published run for this pair has passed the checks yet. 1 row was rejected (see how the checks work below).
More about this pair
How much VRAM does Llama 3.1 70B need?
The Q4_K_M file is 42.5 GB. Add roughly 1.5 GB for the runtime and an ~8K-token context, so about 44 GB of VRAM holds it comfortably. Longer contexts grow the KV cache and need more.
What is the fastest Llama 3.1 70B can generate on the RTX 5080?
Generation reads every weight once per token, so the RTX 5080's 960 GB/s of memory bandwidth divided by the 42.5 GB file sets a ceiling near 23 tokens per second once the whole model is resident. Real runs land below it; SpecPicks rejects any published figure above it.
Check another pair
Llama 3.1 70B on other GPUs
- RTX 4060 — Offload
- RTX 3060 Ti — Offload
- RTX 3060 12GB — Offload
- Intel Arc B580 — Offload
- RTX 4070 SUPER — Offload
- RTX 4060 Ti 16GB — Offload
- RTX 5060 Ti 16GB — Offload
- Intel Arc A770 16GB — Offload
- Radeon RX 9070 XT — Offload
- RTX 4070 Ti SUPER — Offload
- RTX 4080 — Offload
- RTX 5070 Ti — Offload
- RTX 3090 — Offload
- Radeon RX 7900 XTX — Offload
- RTX 4090 — Offload
- RTX 5090 — Offload
- RTX A6000 48GB — Runs, 14.6 tok/s median
- RTX PRO 6000 Blackwell 96GB — Runs, 30.5 tok/s median
Other models on the RTX 5080
- Llama 3.2 1B — Runs, 103 tok/s median
- Llama 3.2 3B — Runs
- Mistral 7B — Runs
- Qwen2.5 7B — Runs
- Llama 3.1 8B — Runs, 88.5 tok/s median
- DeepSeek-R1-Distill-Llama 8B — Runs
- Qwen3 8B — Runs, 94.1 tok/s median
- Gemma 2 9B — Runs
- Gemma 3 12B — Runs, 71 tok/s median
- Qwen2.5 14B — Runs, 55.3 tok/s median
- DeepSeek-R1-Distill-Qwen 14B — Runs, 70 tok/s median
- Qwen3 14B — Runs, 64 tok/s median
- Phi-4 14B — Runs
- gpt-oss-20b — Runs, 134 tok/s median
- 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
- Llama 3.3 70B — Offload
- DeepSeek-R1-Distill-Llama 70B — Offload
How the checks work
The fit is the Q4_K_M 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 above, 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.