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Can the AMD Radeon RX 7900 XT run Phi-4 14B?

Radeon RX 7900 XT × Phi-4 14B8K context
YesRuns fully on the GPU
Memory at Q8_017.9 GB of 20 GB
Weights 15.6 GBKV cache 1.7 GBRuntime 0.6 GB
QuantQ8_0Near-lossless
Speed~31tokens per second
Max context16Kthe 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 AMD Radeon RX 7900 XT can run Phi-4 14B fully in VRAM at Q8_0 (near-lossless), using about 17.9 GB of the 20 GB available, at roughly 31 tokens/second.

Try other context lengths

Run it with Ollama

With Ollama installed, one command downloads and starts Phi-4 14B:

ollama run phi4:14b

Ollama's default download is Q4_K_M (about 11.2 GB here). You have room for Q8_0, which is near-lossless: pick that GGUF in LM Studio or from Hugging Face.

New to this? Step-by-step setup for the Radeon RX 7900 XT

Run it in the cloud

No AMD Radeon RX 7900 XT? Run Phi-4 14B 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 20 GB the AMD Radeon RX 7900 XT can use.

QuantQualityMemoryFits?Speed
FP16Full quality31.7 GBToo big—
Q8_0Near-lossless17.9 GBFits~31 tok/s
Q6_KExcellent14.3 GBFits~40 tok/s
Q5_K_MVery good12.7 GBFits~46 tok/s
Q4_K_MGood, most popular11.2 GBFits~54 tok/s
Q3_K_MNoticeably degraded9.5 GBFits~67 tok/s
Q2_KHeavily degraded7.8 GBFits~87 tok/s

Measured speed from real Radeon RX 7900 XT owners

Tokens per second that people measured on their own AMD Radeon RX 7900 XT, next to our estimate.

No one has measured Phi-4 14B on the AMD Radeon RX 7900 XT yet. The speeds above are estimates. Run the benchmark and yours becomes the first real number on this page.

Have a Radeon RX 7900 XT? Add your real speed

One command times Phi-4 14B 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 -- phi4:14b

Windows (PowerShell)

$env:GPUFIT_MODEL="phi4:14b"; irm https://gpufit.dev/bench.ps1 | iex

How the benchmark works

GPUs that run Phi-4 14B comfortably

Models that run well on the AMD Radeon RX 7900 XT

Frequently asked questions

Can AMD Radeon RX 7900 XT run Phi-4 14B?

Yes. The AMD Radeon RX 7900 XT can run Phi-4 14B fully in VRAM at Q8_0 (near-lossless), using about 17.9 GB of the 20 GB available, at roughly 31 tokens/second.

How much VRAM does Phi-4 14B need?

About 11.2 GB at Q4_K_M with 8,192 tokens of context, and about 31.7 GB at full FP16 precision.

How fast is Phi-4 14B on the AMD Radeon RX 7900 XT?

Roughly 31 tokens per second at Q8_0, estimated from the AMD Radeon RX 7900 XT's 800 GB/s memory bandwidth.