Llama 4 Maverick 17B 128E needs ~254.7 GB but Mac Studio M2 Ultra 64GB only has 46.1 GB. Try a smaller quantization or lighter model.
Operating mode
Interactive favors responsiveness, while light API and scale-out lean harder on serving readiness. The fit stays the same, but the recommendation lens changes.
Current mode
Balanced
Balanced for general local use. Keeps the ranking neutral across personal and serving workflows.
Select quantization to explore
208.6 GB over capacity — needs offload or smaller quantization
Fit status
Too heavy
Decode
4.3 tok/s
TTFT
45139 ms
Safe context
4K
Memory
254.7 GB / 46.1 GB
Offload
80%
Usable shared or unified memory is the main blocker for this model.
Not enough usable memory
The model needs 254.7 GB, but this setup only exposes 46.1 GB of usable shared or unified memory.
Move to a larger memory pool
A larger unified-memory SKU or a discrete high-bandwidth GPU is the cleanest way to make this model practical.
| Workload | Grade | Fit | Decode | TTFT | Context |
|---|---|---|---|---|---|
| Chat | F | Too heavy | 4.3 tok/s | 24621 ms | 4K |
| Coding | F | Too heavy | 4.3 tok/s | 45139 ms | 4K |
| Agentic Coding | F | Too heavy | 4.3 tok/s | 65657 ms | 4K |
| Reasoning | F | Too heavy | 4.3 tok/s | 53347 ms | 4K |
| RAG | F | Too heavy | 4.3 tok/s | 82072 ms | 4K |
How Llama 4 Maverick 17B 128E (400B params) fits at each quantization level on Mac Studio M2 Ultra 64GB (46.1 GB usable).
| Quant | Bits | VRAM | Quality | Fit |
|---|---|---|---|---|
Q2_K | 2 | 156.0 GB | Low | F0 |
Q3_K_S | 3 | 196.0 GB | Low | F0 |
NVFP4 | 4 | 224.0 GB | Medium | F0 |
Q4_K_M | 4 | 244.0 GB | Medium | F0 |
Q5_K_M | 5 | 288.0 GB | High | F0 |
Q6_K | 6 | 328.0 GB | High | F0 |
Q8_0 | 8 | 428.0 GB | Very High | F0 |
F16 | 16 | 820.0 GB | Maximum | F0 |
Upgrade options
Makes the model fit on the accelerator instead of staying completely out of reach.
Removes host-memory offload, which is usually the single biggest latency and throughput win.
~$8,000 MSRP
Makes the model fit on the accelerator instead of staying completely out of reach.
Raises estimated decode speed by about 781%.
~$20,000 MSRP
No, Llama 4 Maverick 17B 128E requires more memory than Mac Studio M2 Ultra 64GB provides.
Llama 4 Maverick 17B 128E (400B parameters) requires approximately 254.7 GB of memory with Q4_K_M quantization.
The recommended quantization for Llama 4 Maverick 17B 128E is Q4_K_M, which balances quality and memory efficiency.
On Mac Studio M2 Ultra 64GB, Llama 4 Maverick 17B 128E achieves approximately 4.3 tokens per second decode speed with a time-to-first-token of 45139ms using Q4_K_M quantization.
For coding workloads, Llama 4 Maverick 17B 128E on Mac Studio M2 Ultra 64GB receives a F grade with 4.3 tok/s and 4K context.
On Mac Studio M2 Ultra 64GB, Llama 4 Maverick 17B 128E can safely use up to 4K tokens of context. The model's official context limit is 1.0M, but available memory constrains the safe maximum.
Move to a larger memory pool. A larger unified-memory SKU or a discrete high-bandwidth GPU is the cleanest way to make this model practical.
Not always. Mac Studio M2 Ultra 64GB can often fit larger models thanks to unified memory, but a discrete GPU with dedicated high-bandwidth VRAM may still decode faster once the model fits. For this combination, the important distinction is capacity versus sustained throughput.
Paste this snippet into any page to show a live fit card.
<iframe src="https://willitrunai.com/embed/llama-4-maverick-17b-128e-on-m2-ultra-64gb" width="400" height="180" frameborder="0" style="border:none;border-radius:12px;overflow:hidden;" title="Will It Run AI — fit result"></iframe>
Preview:
