Some versions have wifi built in other need it by usb ports when the ps3 came out the 20 gb was almost bare bones compared to the 60 gb version which has more features than the current 80 and 40 gb
Can’t connect to Internet on PlayStation 3 Jan 29, 2018 How to Connect PS3 to Wifi | PC-MIND Dec 06, 2017 Does the PS4 support 802.11n/ac WiFi connectivity? : PS4
The PlayStation 3 (PS3) video game console has been produced in various models during its life cycle. At launch, the PlayStation 3 was available with either a 20, or 60 GB hard disk drive in the US and Japan, respectively— priced from US$499 to US$599; and with either a 40, 60, or 80 GB hard disk drive in Europe, priced from £299 to £425. Since then, Sony have released two further
Sony PlayStation 3 (80GB) MotorStorm Limited Edition 98004. Sony PlayStation 3 (20GB) ps398001. Sony PlayStation 3 (80GB) Metal Gear Solid 4 Bundle 98011. Sony PlayStation 3 (40GB) 98006.
Sony PlayStation 3 Specs - CNET
PlayStation Vita with WiFi Black (ReCharged Refurbished