Can RTX 4090 run Flint 40B-A2.5B?
Every measured result for Flint 40B-A2.5B on RTX 4090
| Build | Quant / setup | Engine | tok/s | |
|---|---|---|---|---|
| RTX 4090 (llm-speed signed run, Oct 2026): Flint 40B-A2.5B at 169-179 tok/s on llama.cpp | NVFP4 | llama.cpp 0.7.0-dev (build 11803) | 179.4 | source |
| RTX 4090 (llm-speed signed run, Oct 2026): Flint 40B-A2.5B at 169-179 tok/s on llama.cpp | UD-Q3_K_XL | llama.cpp 0.7.0-dev (build 11803) | 169.2 | source |
Memory: RTX 4090 has 24 GB. Flint 40B-A2.5B weights are about 24.3 GB at Q4_K_M (39.8B params × 4.89 bits ÷ 8, before context/KV cache). Arithmetic, not a measurement; long contexts need more. Check other quants in the VRAM calculator. The measured runs on it used NVFP4 / UD-Q3_K_XL, not Q4_K_M. At Q4_K_M the weights are about 24.3 GB, more than 24 GB, so Q4_K_M doesn't fully fit without offloading part of the model to system RAM.
Speeds are decode (generation) tokens/sec as reported by each source; quant, engine and context differ, so small gaps are noise.
All measured speeds for Flint 40B-A2.5B: best home rig for Flint 40B-A2.5B.
Flint 40B-A2.5B on other hardware: Apple M4 Pro · RTX 3090
Other models measured on RTX 4090: GLM 4.7 Flash · Gemma 4 12B · Gemma 4 26B-A4B · Gemma 4 31B · LFM2.5 24B-A2B · Nemotron 3.5 Bolt 74B-A9B · Qwen3.5 9B · Qwen3.6 27B · Qwen3.6 35B-A3B · gpt-oss 20B
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