Falcon 40B Instruct needs ~38.7 GB VRAM. Mac Studio M2 Ultra 64GB has 46.1 GB. With Q5_K_M quantization, expect ~18 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
Tight fit
Decode
17.9 tok/s
TTFT
10833 ms
Safe context
8K
Memory
38.7 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 | B | Tight fit | 17.9 tok/s | 5909 ms | 8K |
| Coding | B | Tight fit | 17.9 tok/s | 10833 ms | 8K |
| Agentic Coding | B | Tight fit | 17.9 tok/s | 15757 ms | 8K |
| Reasoning | B | Tight fit | 17.9 tok/s | 12803 ms | 8K |
| RAG | B | Tight fit | 17.9 tok/s | 19696 ms | 8K |
How Falcon 40B Instruct (40B params) fits at each quantization level on Mac Studio M2 Ultra 64GB (46.1 GB usable).
| Quant | Bits | VRAM | Quality | Fit |
|---|---|---|---|---|
Q2_K | 2 | 15.6 GB | Low | B66 |
Q3_K_S | 3 | 19.6 GB | Low | B67 |
NVFP4 | 4 | 22.4 GB | Medium | B68 |
Q4_K_M | 4 | 24.4 GB | Medium | B69 |
Q5_K_M | 5 | 28.8 GB | High | B69 |
Q6_KBest for your GPU | 6 | 32.8 GB | High | B68 |
Q8_0 | 8 | 42.8 GB | Very High | F0 |
F16 | 16 | 82.0 GB | Maximum | F0 |
Copy-paste commands to run Falcon 40B Instruct on your machine.
Run
docker run --rm -it ghcr.io/ggerganov/llama.cpp:full \
--hf-repo "tiiuae/falcon-40b-instruct" \
--hf-file "falcon-40b-instruct-Q5_K_M.gguf" \
-c 4096 -ngl 99Opções de upgrade
Raises estimated decode speed by about 29%.
Adds memory headroom for longer context windows and future model growth.
~$2,499 MSRP
Adds memory headroom for longer context windows and future model growth.
~$3,999 MSRP
Yes, Mac Studio M2 Ultra 64GB can run Falcon 40B Instruct with a B grade (Tight fit). Expected decode speed: 17.9 tok/s.
Falcon 40B Instruct (40B parameters) requires approximately 38.7 GB of memory with Q5_K_M quantization.
The recommended quantization for Falcon 40B Instruct is Q5_K_M, which balances quality and memory efficiency.
On Mac Studio M2 Ultra 64GB, Falcon 40B Instruct achieves approximately 17.9 tokens per second decode speed with a time-to-first-token of 10833ms using Q5_K_M quantization.
For coding workloads, Falcon 40B Instruct on Mac Studio M2 Ultra 64GB receives a B grade with 17.9 tok/s and 8K context.
On Mac Studio M2 Ultra 64GB, Falcon 40B Instruct can safely use up to 8K tokens of context. The model's official context limit is 8K, but available memory constrains the safe maximum.
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/falcon-40b-instruct-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: