MEM Score 46.3 on Apple M4 — HBM

MEM Score46.3

Percentile: Calibrating; 3 of 5 class runs needed. Top 74 % overall
Device class: Apple M4; LPDDR5X, 128-bit, 120 GB/s peak

Read91.0GB/s76 % of published peak

Write81.4GB/s

Copy85.6GB/s

Random access	9.80 GB/s	0.61 G reads/s
Latency proxy	285 ns
Sustain	85.6 GB/s	100 % held over 18 s

AI decode ceiling

23tokens/s, 8B model at 4-bit

2.6 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: 2.86 TB
Duration: 48.0 s
Stack position: Layer 002, die 50 of 64
Run: xx6wzhqtv3

Test your memory Find it in The Stack Apple M4