Magistral Small 2507 needs ~20.6 GB VRAM. MacBook Pro M3 24GB has 17.3 GB. With Q4_K_M quantization, expect ~4 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
3.3 GB over capacity — needs offload or smaller quantization
Fit status
Very compromised (needs ~2.3 GB host RAM)
Decode
3.8 tok/s
TTFT
50415 ms
Safe context
4K
Memory
20.6 GB / 17.3 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 2.3 GB of extra host RAM just for the offloaded portion, before OS and other tools.
| Workload | Grade | Fit | Decode | TTFT | Context |
|---|---|---|---|---|---|
| Chat | A | Very compromised (needs ~1.6 GB host RAM) | 4.2 tok/s | 25402 ms | 4K |
| Coding | B | Very compromised (needs ~2.3 GB host RAM) | 3.8 tok/s | 50415 ms | 4K |
| Agentic Coding | F | Too heavy | 3.4 tok/s | 84051 ms | 4K |
| Reasoning | B | Very compromised (needs ~2.3 GB host RAM) | 3.8 tok/s | 59581 ms | 4K |
| RAG | F | Too heavy | 3.4 tok/s | 105063 ms | 4K |
Inference speed
Estimated decode speed (tokens/sec) for Magistral Small 2507 at Q4_K_M across popular GPUs and Apple Silicon, using the fastest local runtime per device. Fastest is RTX 5090 32GB at ~88 tok/s. Speed is memory-bandwidth bound, so cards that fit the whole model in VRAM run far faster than ones that offload to system RAM.
| GPU / Mac | Memory | Quant | Speed (tok/s) | Fits? |
|---|---|---|---|---|
 RTX 5090 32GB | 32 GB | Q4_K_M | 88.2 | Fits |
| RTX 4090 24GB | 24 GB | Q4_K_M | 56.3 | Tight |
RX 7900 XTX 24GB | 24 GB | Q4_K_M | 50.8 | Tight |
| RTX 3090 24GB | 24 GB | Q4_K_M | 48.1 | Tight |
Mac Studio M3 Ultra 256GB | 256 GB | Q4_K_M | 40.9 | Fits |
MacBook Pro M4 Max 128GB | 128 GB | Q4_K_M | 36.8 | Fits |
MacBook Pro M4 Max 64GB | 64 GB | Q4_K_M | 36.8 | Fits |
Mac Studio M2 Ultra 128GB | 128 GB | Q4_K_M | 34.1 | Fits |
Mac Studio M1 Ultra 128GB | 128 GB | Q4_K_M | 32.3 | Fits |
MacBook Pro M4 Pro 48GB | 48 GB | Q4_K_M | 23.2 | Fits |
| RTX 4080 Super 16GB | 16 GB | Q4_K_M | 21.3 | Too big |
MacBook Pro M3 Max 64GB | 64 GB | Q4_K_M | 17.6 | Fits |
MacBook Pro M1 Max 64GB | 64 GB | Q4_K_M | 16.2 | Fits |
| RTX 4070 12GB | 12 GB | Q4_K_M | 7.5 | Too big |
| RTX 3060 12GB | 12 GB | Q4_K_M | 4.7 | Too big |
| RTX 4060 8GB | 8 GB | Q4_K_M | 2.2 | Too big |
Estimates for single-stream decoding at Q4_K_M; real tokens/sec varies with prompt length, context, batch size, and runtime build. Prompt processing (prefill) is faster than the decode figures shown here.
How Magistral Small 2507 (24B params) fits at each quantization level on MacBook Pro M3 24GB (17.3 GB usable).
| Quant | Bits | VRAM | Quality | Fit |
|---|---|---|---|---|
Q2_K | 2 | 9.4 GB | Low | S92 |
Q3_K_SBest for your GPU | 3 | 11.8 GB | Low | S92 |
NVFP4 | 4 | 13.4 GB | Medium | F0 |
Q4_K_M | 4 | 14.6 GB | Medium | F0 |
Q5_K_M | 5 | 17.3 GB | High | F0 |
Q6_K | 6 | 19.7 GB | High | F0 |
Q8_0 | 8 | 25.7 GB | Very High | F0 |
F16 | 16 | 49.2 GB | Maximum | F0 |
Copy-paste commands to run Magistral Small 2507 on your machine.
Run
ollama run magistralOpções de upgrade
Removes host-memory offload, which is usually the single biggest latency and throughput win.
Raises estimated decode speed by about 150%.
~$799 MSRP
Removes host-memory offload, which is usually the single biggest latency and throughput win.
Raises estimated decode speed by about 150%.
~$1,099 MSRP
Removes host-memory offload, which is usually the single biggest latency and throughput win.
Raises estimated decode speed by about 150%.
~$1,099 MSRP
RTX 5090 32GBMaior saltoRemoves host-memory offload, which is usually the single biggest latency and throughput win.
Raises estimated decode speed by about 1755%.
~$1,999 MSRP
Yes, MacBook Pro M3 24GB can run Magistral Small 2507 with a B grade (Very compromised (needs ~2.3 GB host RAM)). Expected decode speed: 3.8 tok/s.
Magistral Small 2507 (24B parameters) requires approximately 20.6 GB of memory with Q4_K_M quantization.
The recommended quantization for Magistral Small 2507 is Q4_K_M, which balances quality and memory efficiency.
On MacBook Pro M3 24GB, Magistral Small 2507 achieves approximately 3.8 tokens per second decode speed with a time-to-first-token of 50415ms using Q4_K_M quantization.
For coding workloads, Magistral Small 2507 on MacBook Pro M3 24GB receives a B grade with 3.8 tok/s and 4K context.
On MacBook Pro M3 24GB, Magistral Small 2507 can safely use up to 4K tokens of context. The model's official context limit is 131K, but available memory constrains the safe maximum.
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. MacBook Pro M3 24GB 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/magistral-small-2507-on-m3-24gb" width="400" height="180" frameborder="0" style="border:none;border-radius:12px;overflow:hidden;" title="Will It Run AI — fit result"></iframe>
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