According to a few leaked photos from Twitter user shortman82, it seems the PS4 Slim will support 5 GHz wi-fi connection.
While Sony hasn’t confirmed any information that has released about the new slim model, the leaked photos strongly suggest the system will support 5 GHz. The photo of the user’s connection status screen does not display a 5 GHz connection, but one new category “Wi-Fi Frequency Band In Use” suggests there are multiple frequency bands to use. Additionally a photo of the console’s manual itself specifically discloses information about the new feature.
Hopefully, the PlayStation meeting in New York on September 7 will shed some light on this new console as well as the long rumored PS4 Neo.