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HBM
WebGPUEnterprise

Memory verified.

Measured 27 September 2026 at 18:27 UTC on Chrome 154, macOS by OP-0E4CC4.

MEM Score70.5
Percentile
Calibrating
1 of 5 class runs needed. Top 53 % overall
Device class
Apple M1 Max
LPDDR5, 512-bit, 400 GB/s peak
Read362.0GB/s91 % of published peak
Write368.6GB/s
Copy361.6GB/s
Random access10.2 GB/s0.64 G reads/s
Latency proxy549 ns
Sustain348.0 GB/s99 % held over 18 s
AI decode ceiling

91tokens/s, 8B model at 4-bit

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

READWRITECOPYSUSTAINMEMPRINT / 547426
Memprint: drawn from this run's measurements only.
  • The tab was hidden for part of the run.
  • Form factor declared as laptop.
Timing
GPU timestamps
Working set
2 × 256 MiB
Data moved
11.9 TB
Duration
48.5 s
Stack position
Layer 001, die 62 of 64
Run
fvn6n1y7wj
Test your memoryFind it in The StackApple M1 Max