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Yes. DeepSeek R1 Distill Qwen 1.5B fits in fast memory on RTX 4080 16GB at Q8_0 (2.6 GB needed, 15.5 GB usable), about 226 tok/s (estimate).
Hardware: RTX 4080 16GB · Model: DeepSeek R1 Distill Qwen 1.5B
RTX 4080 16GB has 16 GB of VRAM and 717 GB/s of memory bandwidth. The checker holds back 0.5 GB of VRAM for the driver and assumes 16 GB of system RAM, so fast memory usable by Ollama is 15.5 GB. Partial offload may also use 60% of that system RAM. DeepSeek R1 Distill Qwen 1.5B (1.78B, DeepSeek) at Q8_0 is a 1.9 GB download and needs 2.6 GB with headroom for about 8k tokens.
| Best quant | Q8_0 |
|---|---|
| Download size | 1.9 GB |
| Memory needed | 2.6 GB |
| Usable fast memory | 15.5 GB |
| Fit | fits in fast memory |
| Estimated speed | ~226 tok/s (estimate) |
| Command | ollama run deepseek-r1:1.5b-qwen-distill-q8_0 |
Estimates, not benchmarks. Model sizes are ollama.com download sizes; memory needed adds headroom for ~8k tokens of context; speeds are rough figures from memory bandwidth. Data updated 2026-10-23.
A project by OnDevice Labs · llms.txt