Rent a GPU

Can the Apple M2 Ultra (192GB) run Qwen3 4B?

Apple M2 Ultra (192GB) × Qwen3 4B8K context
YesRuns fully on the GPU
Memory at FP169.8 GB of 144 GB
Weights 8 GBKV cache 1.2 GBRuntime 0.6 GB
QuantFP16Full quality
Memory9.8 GBof 144 GB usable
Speed~60tokens per second
  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 Apple M2 Ultra (192GB) can run Qwen3 4B fully in unified memory at FP16 (full quality), using about 9.8 GB of the 144 GB available, at roughly 60 tokens/second.

Try other context lengths

Run it with Ollama

With Ollama installed, one command downloads and starts Qwen3 4B:

ollama run qwen3:4b

Ollama's default download is Q4_K_M (about 4.2 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 Apple M2 Ultra (192GB)

Run it in the cloud

No Apple M2 Ultra (192GB)? Run Qwen3 4B in the cloud.

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

Rent a GPU on RunPodRent a GPU on Vast.ai

Memory needed by quantization

At 8,192 tokens of context. The black line marks the 144 GB the Apple M2 Ultra (192GB) can use. macOS lets the GPU use about 144 GB of the 192 GB unified memory by default.

QuantQualityMemoryFits?Speed
FP16Full quality9.8 GBFits~60 tok/s
Q8_0Near-lossless6.1 GBFits~112 tok/s
Q6_KExcellent5.1 GBFits~146 tok/s
Q5_K_MVery good4.7 GBFits~168 tok/s
Q4_K_MGood, most popular4.2 GBFits~197 tok/s
Q3_K_MNoticeably degraded3.8 GBFits~244 tok/s
Q2_KHeavily degraded3.3 GBFits~318 tok/s

Measured speed from real Apple M2 Ultra (192GB) owners

Tokens per second that people measured on their own Apple M2 Ultra (192GB), next to our estimate.

No one has measured Qwen3 4B on the Apple M2 Ultra (192GB) yet. The speeds above are estimates. Run the benchmark and yours becomes the first real number on this page.

Have an Apple M2 Ultra (192GB)? Add your real speed

One command times Qwen3 4B 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 -- qwen3:4b

Windows (PowerShell)

$env:GPUFIT_MODEL="qwen3:4b"; irm https://gpufit.dev/bench.ps1 | iex

How the benchmark works

GPUs that run Qwen3 4B comfortably

Models that run well on the Apple M2 Ultra (192GB)

Frequently asked questions

Can Apple M2 Ultra (192GB) run Qwen3 4B?

Yes. The Apple M2 Ultra (192GB) can run Qwen3 4B fully in unified memory at FP16 (full quality), using about 9.8 GB of the 144 GB available, at roughly 60 tokens/second.

How much VRAM does Qwen3 4B need?

About 4.2 GB at Q4_K_M with 8,192 tokens of context, and about 9.8 GB at full FP16 precision.

How fast is Qwen3 4B on the Apple M2 Ultra (192GB)?

Roughly 60 tokens per second at FP16, estimated from the Apple M2 Ultra (192GB)'s 800 GB/s memory bandwidth.