The Lenovo G50-45 has a better Wi-Fi standard than most portable PCs of a similar age and spec to it. This Lenovo laptop has an 802.11n WiFi standard, whereas most laptops that have been around for a comparable time to it have an 802.11b WiFi standard. This laptop also has an 802.11g WiFi standard.
An 802.11n WiFi standard is actually the best Wi-Fi standard across all similar spec laptops that are a comparable age to the G50-45.
An 802.11a WiFi standard is the worst Wi-Fi standard across comparable types of laptop.