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estimate

Can I run Phi-4 14B on an RTX 4090?

Yes, fully in VRAM (estimate)

Can I run Phi-4 14B on an RTX 4090? Yes, fully in VRAM (estimate). About 11.3 GB at Q4_K_M (estimate).

Updated . The later of the hardware price date and the formula date.

Phi-4 14B on RTX 4090, formula estimate
QuantContextWeightsKVOverheadTotalUsableFitEst. tok/s
Q4 Q4_K_M8,192 tokens8.8 GB estimate1.7 GB estimate0.8 GB estimate11.3 GB estimate23.4 GB estimatefull74 tok/s estimate
Q5 Q5 (~0.71 bytes/param)8,192 tokens10.4 GB estimate1.7 GB estimate0.8 GB estimate12.9 GB estimate23.4 GB estimatefull64 tok/s estimate
Q8 Q88,192 tokens15.7 GB estimate1.7 GB estimate0.8 GB estimate18.2 GB estimate23.4 GB estimatefull45 tok/s estimate
FP16 FP168,192 tokens29.4 GB estimate1.7 GB estimate0.8 GB estimate31.9 GB estimate23.4 GB estimateno—
Q4, longer context16,384 tokens8.8 GB estimate3.4 GB estimate0.8 GB estimate13.0 GB estimate23.4 GB estimatefull64 tok/s estimate

Formula estimate, not a benchmark. Method →

Cheapest catalog option that fits at Q4

GeForce RTX 3060 12GB, used (median of sold listings), €257, dated 2026-10-16. No buy link.

This hardware

$2,446€2,185

used (median of sold listings)

price as of 16 Oct 2026

new (lowest in-stock EU): $4,243€3,790. GPU PRIX. Current low €3,790, MSI Gaming X Slim, Belgium. Page last updated 15 Oct 2026, checked 16 Oct 2026. In-stock boards in that table start at €3,990.

pcprice.watch

Used median €2,185, typical €2,074–€2,290, 111 sales, updated 16 Oct 2026. Not an EU retail listing.

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Phi-4 14B on RTX 4090

[![Phi-4 14B Q4 on RTX 4090: fits ✓ · est. 74 tok/s (estimate)](https://localllmrig.com/badge/phi-4/rtx-4090.svg)](https://localllmrig.com/can-i-run/phi-4/rtx-4090?utm_source=badge)

Questions

Can I run Phi-4 14B on an RTX 4090?
Yes, fully in VRAM (estimate).
How much memory does Phi-4 14B need at Q4?
About 11.3 GB at 8,192 tokens (estimate): 8.8 GB weights, 1.7 GB KV cache, 0.8 GB overhead.
How fast is Phi-4 14B on RTX 4090 (estimate)?
About 74 tok/s at Q4 (estimate, not a benchmark).
Can I run Phi-4 14B on an RTX 4090? VRAM & speed (estimate) · localLLMrig