Option A
ASUS Zenbook S 14 (UX5406, Lunar Lake)
Best AI-class business ultraportable
$1,499
Check price →ASUS Zenbook S 14 vs Dynabook Portégé Z40L
Two enterprise-grade Lunar Lake ultraportables. Zenbook ultraportable polish vs Dynabook's sub-1kg featherweight crown.
Spec-by-spec
| Spec | ASUS Zenbook S 14 | Dynabook Portégé Z40L |
|---|---|---|
| Price | $1,499 | $1,829 |
| Chip | Intel Core Ultra 7 258V (Lunar Lake) | Intel Core Ultra 7 (Lunar Lake) |
| NPU TOPS | 47 TOPS | 47 TOPS |
| RAM | 32 GB | 16 GB |
| LLM tokens/sec (13B Q4) | 28 tok/s | 26 tok/s |
| Sustained thermal score | 72/100 | 68/100 |
| Battery life | 18 h | 19 h |
| Weight | 1.2 kg | 0.99 kg |
| AIPC workload-fit | 9.3 | 8.9 |
Best for
Coding + LinuxASUS
Memory-heavy workloadsASUS
Weight + portabilityDynabook
Field durabilityDynabook
Battery lifeTie
AIPC verdict