GPUs / Apple

Apple M5

Memory
LPDDR5X
Bus
128-bit
Published peak
153 GB/s
Capacity
16 GB

Measured

Read
112.7GB/s
Write
117.7GB/s
Copy
110.3GB/s
Random
11.6GB/s
Latency
262ns
Sustain
115.0GB/s

Medians of 3 verified runs from 2 operators. Read reaches 74 % of the published peak.

50.73 verified runs, median 51.652.5

Local AI speed

ModelParameters4-bit, tokens/s8-bit, tokens/s
Llama 3.1 8B8.03B≤ 28≤ 14
Qwen 2.5 14B14.7B≤ 15≤ 7.7
gpt-oss-20b21B, 3.6B active≤ 63Does not fit
Mistral Small 24B24B≤ 9.4Does not fit
Qwen 2.5 32B32.5BDoes not fitDoes not fit
Llama 3.3 70B70.6BDoes not fitDoes not fit
gpt-oss-120b117B, 5.1B activeDoes not fitDoes not fit
Upper bounds: median read ÷ bytes read per token. Mixture-of-experts models read only their active experts. Fit checks weights against the 16 GB configuration; the KV cache needs room on top.

Top operators

#OperatorScoreReadDate
1OP-3E70AF52.5112.7 GB/s2026-09-27
2OP-8806FF50.7110.5 GB/s2026-09-27

Full Apple M5 leaderboard