The Lenovo W540 has a better Wi-Fi standard than most portable PCs that have been around for more than two years. This notebook PC has an 802.11n wi-Fi standards, whereas most notebook PCs of a similar spec and age to it have an 802.11b wi-Fi standards. This portable PC also have 802.11a and 802.11ac and 802.11g wi-Fi standardss.
This laptop's Wi-Fi standard (802.11n) is in fact the best Wi-Fi standard amongst all portable PCs of this type and age.
The worst Wi-Fi standard across similar types of laptop is 802.11a.