MEM Score 43.7 on Apple M4 — HBM

MEM Score43.7

Percentile: Calibrating; 1 of 5 class runs needed. Top 74 % overall
Device class: Apple M4; LPDDR5X, 128-bit, 120 GB/s peak

Read60.3GB/s50 % of published peak

Write78.9GB/s

Copy83.7GB/s

Random access	9.88 GB/s	0.62 G reads/s
Latency proxy	285 ns
Sustain	83.4 GB/s	100 % held over 18 s

AI decode ceiling

15tokens/s, 8B model at 4-bit

1.7 tokens/s at 70B, if it fits. Upper bound

Memprint: drawn from this run's measurements only.

Form factor declared as laptop.

Timing: GPU timestamps
Working set: 2 × 256 MiB
Data moved: 2.72 TB
Duration: 48.1 s
Stack position: Layer 000, die 22 of 64
Run: z1e6jfvrgx

Test your memory Find it in The Stack Apple M4