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Can the NVIDIA RTX 5090 run Phi-4 Mini 3.8B?

RTX 5090 × Phi-4 Mini 3.8B8K context
YesRuns fully on the GPU
Memory at FP169.4 GB of 32 GB
Weights 7.7 GBKV cache 1.1 GBRuntime 0.6 GB
QuantFP16Full quality
Speed~140tokens per second
Max context128Kthe model's full window
  1. FP16
  2. Q8_0
  3. Q6_K
  4. Q5_K_M
  5. Q4_K_M
  6. Q3_K_M
  7. Q2_K

Yes. The NVIDIA RTX 5090 can run Phi-4 Mini 3.8B fully in VRAM at FP16 (full quality), using about 9.4 GB of the 32 GB available, at roughly 140 tokens/second.

Try other context lengths

Run it with Ollama

With Ollama installed, one command downloads and starts Phi-4 Mini 3.8B:

ollama run phi4-mini:3.8b

Ollama's default download is Q4_K_M (about 4 GB here). You have room for FP16, which is full quality: pick that GGUF in LM Studio or from Hugging Face.

New to this? Step-by-step setup for the RTX 5090

Run it in the cloud

No NVIDIA RTX 5090? Run Phi-4 Mini 3.8B in the cloud.

Rent a cloud GPU by the hour. No upfront cost, stop any time.

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Memory needed by quantization

At 8,192 tokens of context. The black line marks the 32 GB the NVIDIA RTX 5090 can use.

QuantQualityMemoryFits?Speed
FP16Full quality9.4 GBFits~140 tok/s
Q8_0Near-lossless5.8 GBFits~264 tok/s
Q6_KExcellent4.8 GBFits~341 tok/s
Q5_K_MVery good4.4 GBFits~394 tok/s
Q4_K_MGood, most popular4 GBFits~462 tok/s
Q3_K_MNoticeably degraded3.6 GBFits~573 tok/s
Q2_KHeavily degraded3.1 GBFits~747 tok/s

Measured speed from real RTX 5090 owners

Tokens per second that people measured on their own NVIDIA RTX 5090, next to our estimate.

No one has measured Phi-4 Mini 3.8B on the NVIDIA RTX 5090 yet. The speeds above are estimates. Run the benchmark and yours becomes the first real number on this page.

Have an RTX 5090? Add your real speed

One command times Phi-4 Mini 3.8B in your own Ollama, shows you exactly what it would send, and asks before sending anything. No sign-up, no personal data.

macOS and Linux

curl -fsSL https://gpufit.dev/bench.sh | sh -s -- phi4-mini:3.8b

Windows (PowerShell)

$env:GPUFIT_MODEL="phi4-mini:3.8b"; irm https://gpufit.dev/bench.ps1 | iex

How the benchmark works

GPUs that run Phi-4 Mini 3.8B comfortably

Models that run well on the NVIDIA RTX 5090

Frequently asked questions

Can NVIDIA RTX 5090 run Phi-4 Mini 3.8B?

Yes. The NVIDIA RTX 5090 can run Phi-4 Mini 3.8B fully in VRAM at FP16 (full quality), using about 9.4 GB of the 32 GB available, at roughly 140 tokens/second.

How much VRAM does Phi-4 Mini 3.8B need?

About 4 GB at Q4_K_M with 8,192 tokens of context, and about 9.4 GB at full FP16 precision.

How fast is Phi-4 Mini 3.8B on the NVIDIA RTX 5090?

Roughly 140 tokens per second at FP16, estimated from the NVIDIA RTX 5090's 1792 GB/s memory bandwidth.