Is unified memory on Mac Studio M1 Ultra 64GB as fast as VRAM for Baichuan M2 32B Q4 K M?

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.

Can Baichuan M2 32B Q4 K M run on Mac Studio M1 Ultra 64GB?

YES — Runs Great

C51Usable

Estimated from fit model

Baichuan M2 32B Q4 K M needs ~31.1 GB VRAM. Mac Studio M1 Ultra 64GB has 46.1 GB. With Q4_K_M quantization, expect ~23 tok/s.

Runtime: llama.cppCapacity: RoomyBandwidth: HighStack: StandardBottleneck: Balanced

Operating mode

Choose the run profile you care about

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.

Capabilities:

Select quantization to explore

Q4_K_M (Medium quality) — 31.1 GB, 22.5 tok/s, Runs well

31.1 GB required46.1 GB available

67% VRAM used

Fit status

Runs well

Decode

22.5 tok/s

TTFT

8589 ms

Safe context

80K

Memory

31.1 GB / 46.1 GB

Memory breakdown

Weights19.5 GB

KV Cache3.8 GB

Runtime0.9 GB

Headroom6.9 GB

See how fast it feels

See how fast it feelsBaichuan M2 32B Q4 K M on Mac Studio M1 Ultra 64GB
1st promptCold start — includes initialization
>What is local AI inference?
Local AI inference means running an AI language model directly on your own hardware — your laptop, desktop, or server — instead of sending requests to a remote cloud API.

When you run inference locally the model weights are loaded into your GPU or unified memory. Each token you generate requires reading those weights from memory, so memory bandwidth is the main bottleneck for decode speed.

Key benefits of running locally:
  - Full privacy: your prompts never leave your machine
  - No per-token cost or rate limits
  - Works offline once the model is downloaded
  - Latency depends only on your hardware
2nd promptWarm — model ready, no init overhead
>How much VRAM do I need?
It depends on the model size and quantization level. A rough rule of thumb:

  Model size     Q4 (4-bit)    Q8 (8-bit)    FP16
  7B params      ~4.3 GB       ~7.5 GB       ~14 GB
  13B params     ~7.9 GB       ~13.9 GB      ~26 GB
  70B params     ~42.7 GB      ~74.9 GB      ~140 GB

Most people use 4-bit quantization (Q4_K_M) which gives 90-95% of full quality at a fraction of the memory. A 24 GB GPU can comfortably run most 7B-13B models.
Estimated: 22.5 tok/s decode · 8.6s TTFT (warm) · 56 tok/s prefill

What limits this setup

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.

Best improvement path

Performance by workload

Workload	Grade	Fit	Decode	TTFT	Context
Chat	C	Runs well	22.5 tok/s	4685 ms	80K
Coding	C	Runs well	22.5 tok/s	8589 ms	80K
Agentic Coding	C	Runs well	22.5 tok/s	12493 ms	80K
Reasoning	C	Runs well	22.5 tok/s	10150 ms	80K
RAG	C	Runs well	22.5 tok/s	15616 ms	80K

Quantization options

How Baichuan M2 32B Q4 K M (32B params) fits at each quantization level on Mac Studio M1 Ultra 64GB (46.1 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	12.5 GB	Low	C44
Q3_K_S	3	15.7 GB	Low	C45
NVFP4	4

Get started

Copy-paste commands to run Baichuan M2 32B Q4 K M on your machine.

Run

lms load hf-baichuan-inc--baichuan-m2-32b-q4-k-m-gguf && lms server start

Upgrade options

Hardware that runs Baichuan M2 32B Q4 K M well

RTX PRO 5000 Blackwell 48GBBudget pick

1344 GB/s (+544)

Raises estimated decode speed by about 157%.57.8 tok/s decode

Raises estimated decode speed by about 157%.

~$4,999 MSRP

RTX 6000 Ada 48GBBest value

960 GB/s (+160)

Raises estimated decode speed by about 79%.40.3 tok/s decode

Raises estimated decode speed by about 79%.

~$6,800 MSRP

Frequently asked questions

Can Mac Studio M1 Ultra 64GB run Baichuan M2 32B Q4 K M?

Yes, Mac Studio M1 Ultra 64GB can run Baichuan M2 32B Q4 K M with a C grade (Runs well). Expected decode speed: 22.5 tok/s.

How much VRAM does Baichuan M2 32B Q4 K M need?

Baichuan M2 32B Q4 K M (32B parameters) requires approximately 31.1 GB of memory with Q4_K_M quantization.

What is the best quantization for Baichuan M2 32B Q4 K M?

The recommended quantization for Baichuan M2 32B Q4 K M is Q4_K_M, which balances quality and memory efficiency.

What speed will Baichuan M2 32B Q4 K M run at on Mac Studio M1 Ultra 64GB?

On Mac Studio M1 Ultra 64GB, Baichuan M2 32B Q4 K M achieves approximately 22.5 tokens per second decode speed with a time-to-first-token of 8589ms using Q4_K_M quantization.

Can Mac Studio M1 Ultra 64GB run Baichuan M2 32B Q4 K M for coding?

For coding workloads, Baichuan M2 32B Q4 K M on Mac Studio M1 Ultra 64GB receives a C grade with 22.5 tok/s and 80K context.

What context window can Baichuan M2 32B Q4 K M use on Mac Studio M1 Ultra 64GB?

On Mac Studio M1 Ultra 64GB, Baichuan M2 32B Q4 K M can safely use up to 80K tokens of context. The model's official context limit is —, but available memory constrains the safe maximum.

See all results for Mac Studio M1 Ultra 64GB See all hardware for Baichuan M2 32B Q4 K M

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