DeepSeek LLM 67B needs ~54.5 GB VRAM. Mac Studio M1 Ultra 64GB has 46.1 GB. With Q4_K_M quantization, expect ~9 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
8.4 GB over capacity — needs offload or smaller quantization
Fit status
Very compromised (needs ~6.3 GB host RAM)
Decode
9.1 tok/s
TTFT
21312 ms
Safe context
4K
Memory
54.5 GB / 46.1 GB
Offload
20%
It fits through host-memory offload, and offload is the main reason performance drops.
CPU or host-memory offload is active
About 20% of the working set spills out of accelerator memory, which usually hurts latency and sustained decode throughput.
Very little memory headroom
You can run the model, but there is not much room left for longer context, bigger batches, extra apps, or future model updates.
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.
Remove offload with more accelerator memory
Prioritize a GPU or unified-memory tier that fits the whole model natively. Removing offload usually helps more than small compute gains.
Buy headroom, not only minimum fit
A slightly larger memory tier gives you safer context growth and makes the recommendation more future-proof.
Increase host RAM if you keep offloading
This setup may need roughly 6.3 GB of extra host RAM just for the offloaded portion, before OS and other tools.
| Workload | Grade | Fit | Decode | TTFT | Context |
|---|---|---|---|---|---|
| Chat | C | Very compromised (needs ~4.4 GB host RAM) | 9.8 tok/s | 10826 ms | 4K |
| Coding | C | Very compromised (needs ~6.3 GB host RAM) | 9.1 tok/s | 21312 ms | 4K |
| Agentic Coding | F | Too heavy | 8.0 tok/s | 35089 ms | 4K |
| Reasoning | C | Very compromised (needs ~6.3 GB host RAM) | 9.1 tok/s | 25187 ms | 4K |
| RAG | F | Too heavy | 8.0 tok/s | 43861 ms |
How DeepSeek LLM 67B (67B params) fits at each quantization level on Mac Studio M1 Ultra 64GB (46.1 GB usable).
| Quant | Bits | VRAM | Quality | Fit |
|---|---|---|---|---|
Q2_K | 2 | 26.1 GB | Low | B58 |
Q3_K_SBest for your GPU | 3 | 32.8 GB | Low | B58 |
Copy-paste commands to run DeepSeek LLM 67B on your machine.
Run
docker run --rm -it ghcr.io/ggerganov/llama.cpp:full \
--hf-repo "deepseek-ai/deepseek-llm-67b-chat" \
--hf-file "deepseek-llm-67b-chat-Q4_K_M.gguf" \
-c 4096 -ngl 99Upgrade options
Removes host-memory offload, which is usually the single biggest latency and throughput win.
Raises estimated decode speed by about 76%.
~$2,499 MSRP
Removes host-memory offload, which is usually the single biggest latency and throughput win.
Adds memory headroom for longer context windows and future model growth.
~$2,499 MSRP
Removes host-memory offload, which is usually the single biggest latency and throughput win.
Raises estimated decode speed by about 35%.
~$3,999 MSRP
NVIDIA H100 80GBBiggest leapRemoves host-memory offload, which is usually the single biggest latency and throughput win.
Raises estimated decode speed by about 723%.
~$40,000 MSRP
Yes, Mac Studio M1 Ultra 64GB can run DeepSeek LLM 67B with a C grade (Very compromised (needs ~6.3 GB host RAM)). Expected decode speed: 9.1 tok/s.
DeepSeek LLM 67B (67B parameters) requires approximately 54.5 GB of memory with Q4_K_M quantization.
The recommended quantization for DeepSeek LLM 67B is Q4_K_M, which balances quality and memory efficiency.
On Mac Studio M1 Ultra 64GB, DeepSeek LLM 67B achieves approximately 9.1 tokens per second decode speed with a time-to-first-token of 21312ms using Q4_K_M quantization.
For coding workloads, DeepSeek LLM 67B on Mac Studio M1 Ultra 64GB receives a C grade with 9.1 tok/s and 4K context.
On Mac Studio M1 Ultra 64GB, DeepSeek LLM 67B can safely use up to 4K tokens of context. The model's official context limit is 4K, 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/deepseek-llm-67b-on-m1-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:
| 4K |
| 4 |
37.5 GB |
| Medium |
| F0 |
Q4_K_M | 4 | 40.9 GB | Medium | F0 |
Q5_K_M | 5 | 48.2 GB | High | F0 |
Q6_K | 6 | 54.9 GB | High | F0 |
Q8_0 | 8 | 71.7 GB | Very High | F0 |
F16 | 16 | 137.4 GB | Maximum | F0 |
Remove offload with more accelerator memory. Prioritize a GPU or unified-memory tier that fits the whole model natively. Removing offload usually helps more than small compute gains.
Not always. Mac Studio M1 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.