The frameless display of the IdeaCentre B520 is 23 inches of 16:9 HD. This multitouch display is equipped with Surface Acoustic Wave (SAW) technology, which helps to detect your touchscreen input more accurately. This PC runs on an up to 2nd generation Intel Core i7 processor with Intel Turbo Boost Technology 2.0. The IdeaCentre B520 is equipped with Lenovo's Enhanced Experience 2.0 for Windows 7, a technology that includes the RapidBoot function. RapidBoot allows you to start your PC an average of 20 seconds faster than a typical Windows 7 computer. This model differs from the identically priced IdeaCentre B320 model in that it has integrated Dolby Surround Sound 5.0 speakers (as opposed to the B320's two integrated two watt stereo speakers), up to NVIDIA GT 555M 2GB graphics (as opposed to the B320's Intel HD graphics), up to 16GB of memory (as opposed to 8GB), comes with the Surface Acoustic Wave technology included (whereas the B320 has it as an optional add-on), a 23 inch display (as opposed to 21.5 inches), a 2nd generation Intel Core i7 processor (as opposed to a 2nd generation Intel Core i5), a Blu-Ray drive and optional 3-in-1 mouse (which has motion-drive gaming and air-mouse functionality). However, the IdeaCentre B520 model lacks the IdeaCentre B320's HWTV capability (which allows you to switch back and forth between TV and computer modes), its picture-in-picture function (which allows you to use the TV and computer functions at once), its high-sense webcam, and its larger HDD capacity (4TB as opposed to the B520's 2TB limit). The Lenovo IdeaCentre B520 all-in-one PC has integrated 802.11b/g/n WiFi.