Can RTX 3090 24GB run Phi-4-reasoning?

NVIDIA · 24 GB GDDR6X · 936 GB/s bandwidth · Microsoft · 14.7B · model ctx up to 32K

Yes — the RTX 3090 24GB (24 GB GDDR6X) can run Phi-4-reasoning. At Q4 with the default 8K context it needs ≈ 12.03 GB VRAM (weights 8.09 GB + KV cache 2.94 GB + 1 GB runtime overhead), which fits within 24 GB. Decode at Q4/8K: ≈ 40.5 tok/s (estimated, batch 1). FP16 needs ≈ 33.34 GB — does not fit on this card. Estimates come from memory-bandwidth math; rows tagged measured override estimates. Relative ranking is more reliable than absolute tok/s. Methodology.

Fit & speed by quant and context

Quant	Context	VRAM needed	Fits?	tok/s (decode)
Q4	4K	10.56 GB	Yes	40.5 est.
Q4	8K default	12.03 GB	Yes	40.5 est.
Q4	32K	20.84 GB	Yes	40.5 est.
FP16	4K	31.87 GB	No	18.1 est.
FP16	8K default	33.34 GB	No	16.5 est.
FP16	32K	42.16 GB	No	10.3 est.

Fits = weights + KV(ctx) + 1 GB overhead ≤ 95% of VRAM. Measured anchors are context-agnostic; the fit verdict is recomputed per context. A missing tok/s means the model is far beyond this card (offload-only territory).

VRAM breakdown at 8K context

Quant	Weights	KV cache	Overhead	Total needed	RTX 3090 24GB VRAM
Q4	8.09 GB	2.94 GB	1 GB	12.03 GB	24 GB
FP16	29.4 GB	2.94 GB	1 GB	33.34 GB	24 GB

Other GPUs that run Phi-4-reasoning

• B200 192GB SXM — ≈346.3 tok/s Q4 est.
• MI300X 192GB — ≈229.4 tok/s Q4 est.
• H200 141GB SXM5 — ≈207.8 tok/s Q4 est.
• H100 80GB SXM5 — ≈145.0 tok/s Q4 est.
• Gaudi 3 128GB — ≈141.8 tok/s Q4 est.
• A100 80GB SXM4 — ≈88.3 tok/s Q4 est.
• RTX 5090 32GB — ≈77.6 tok/s Q4 est.
• RTX 4090 24GB — ≈43.6 tok/s Q4 est.

All GPUs for Phi-4-reasoning →

Other models for the RTX 3090 24GB

• Qwen3-0.6B — ≈744.5 tok/s Q4 est.
• gemma-3-1b-it — ≈595.6 tok/s Q4 est.
• Llama-3.2-1B-Instruct — ≈496.4 tok/s Q4 est.
• Qwen3-1.7B — ≈297.8 tok/s Q4 est.
• Qwen3-30B-A3B — ≈198.5 tok/s Q4 est.
• Qwen3-Coder-30B-A3B-Instruct — ≈198.5 tok/s Q4 est.
• GLM-4.7-Flash — ≈198.5 tok/s Q4 est.
• Qwen3-30B-A3B-Instruct-2507 — ≈198.5 tok/s Q4 est.

All models on the RTX 3090 24GB →