The Apple M5 (16GB) uses a unified memory architecture. For reliable local LLM inference without OS memory pressure, this benchmark models a 75% usable allocation (12 GB) with 153 GB/s unified memory bandwidth.
Memory
16 GB
Usable Memory Ceiling
12 GB (75% usable budget)
Bandwidth
153 GB/s
Max Inference Class
14B Models (Q4)
TDP
50W
Estimated memory requirements as context length increases. Curves crossing above the reference line indicate Out of Memory (OOM).
Precision:
Inference throughput, memory compatibility, and generation speeds for open-weights LLMs on Apple M5 (16GB).
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Context:
KV Cache:
Maximum model parameter class runnable by weight precision.
Context:
4-bit
14B Models
8-bit
8B Models
16-bit
3B Models
Hardware capacity for local training and adapter fine-tuning.
Context Length:
QLoRA
14B Models
LoRA
8B Models
Full Parameter Training
1B Models
Guidance for optimal precision and operational ceilings on Apple M5 (16GB).
Inference Sweet Spot
Optimal for 8B models across extended context (32k+). 14B models fit comfortably at Q4 precision with standard context.
Bandwidth & Speed Profile
With 153 GB/s aggregate bandwidth, batch size 1 inference operates in a memory-bandwidth bound regime. Generates approximately 34 tok/s on an 8B Q4 model and 4 tok/s on a 70B Q4 model.
Unified Memory Budget
Modeled with a 75% usable allocation budget to preserve system RAM for macOS and display compositor processes.
Assistant
Online