DeepSeek R1 0528 Qwen3 8B needs ~13.6 GB VRAM. Mac Studio M2 Ultra 64GB has 46.1 GB. With Q4_K_M quantization, expect ~95 tok/s.
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
Fit status
Runs well
Decode
95.1 tok/s
TTFT
2036 ms
Safe context
570K
Memory
13.6 GB / 46.1 GB
This setup is broadly balanced for this model.
Shared-memory contention still exists
The OS, browser, and inference runtime all compete for the same physical memory pool, so real-world headroom is less forgiving than raw capacity suggests.
| Workload | Grade | Fit | Decode | TTFT | Context |
|---|---|---|---|---|---|
| Chat | C | Runs well | 95.1 tok/s | 1111 ms | 570K |
| Coding | C | Runs well | 95.1 tok/s | 2036 ms | 570K |
| Agentic Coding | C | Runs well | 95.1 tok/s | 2962 ms | 570K |
| Reasoning | C | Runs well | 95.1 tok/s | 2406 ms | 570K |
| RAG | C | Runs well | 95.1 tok/s | 3702 ms | 570K |
How DeepSeek R1 0528 Qwen3 8B (8B params) fits at each quantization level on Mac Studio M2 Ultra 64GB (46.1 GB usable).
| Quant | Bits | VRAM | Quality | Fit |
|---|---|---|---|---|
Q2_K | 2 | 3.1 GB | Low | C42 |
Q3_K_S | 3 | 3.9 GB | Low | C42 |
NVFP4 | 4 |
Copy-paste commands to run DeepSeek R1 0528 Qwen3 8B on your machine.
Run
lms load hf-unsloth--deepseek-r1-0528-qwen3-8b-gguf && lms server startYes, Mac Studio M2 Ultra 64GB can run DeepSeek R1 0528 Qwen3 8B with a C grade (Runs well). Expected decode speed: 95.1 tok/s.
DeepSeek R1 0528 Qwen3 8B (8B parameters) requires approximately 13.6 GB of memory with Q4_K_M quantization.
The recommended quantization for DeepSeek R1 0528 Qwen3 8B is Q4_K_M, which balances quality and memory efficiency.
On Mac Studio M2 Ultra 64GB, DeepSeek R1 0528 Qwen3 8B achieves approximately 95.1 tokens per second decode speed with a time-to-first-token of 2036ms using Q4_K_M quantization.
For coding workloads, DeepSeek R1 0528 Qwen3 8B on Mac Studio M2 Ultra 64GB receives a C grade with 95.1 tok/s and 570K context.
On Mac Studio M2 Ultra 64GB, DeepSeek R1 0528 Qwen3 8B can safely use up to 570K tokens of context. The model's official context limit is —, but available memory constrains the safe maximum.
Paste this snippet into any page to show a live fit card.
<iframe src="https://willitrunai.com/embed/hf-unsloth--deepseek-r1-0528-qwen3-8b-gguf-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:
4.5 GB |
| Medium |
| C42 |
Q4_K_M | 4 | 4.9 GB | Medium | C42 |
Q5_K_M | 5 | 5.8 GB | High | C42 |
Q6_K | 6 | 6.6 GB | High | C42 |
Q8_0 | 8 | 8.6 GB | Very High | C43 |
F16Best for your GPU | 16 | 16.4 GB | Maximum | C45 |
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.