(Image credit: Corsair) Earlier this week, readers went ballistic for the Corsair Xeneon Edge LCD touchscreen discount, to the point that we actually sold out the device over at Corsair. Now, it's back in stock with a discount on all three models of 20%, saving you $50 on the list price of $199 . Check out this deal on the Corsair website. Corsair's little touchscreen can be used either as a standalone display on your desk, mounted to any metal surface with magnets, or integrated directly into the side panel of select Corsair cases as a unique PC display. The Xeneon Edge display has a 2560 x 720 resolution and a 60Hz refresh rate. At this size, that's more than enough for a diminutive display. Connectivity is provided by either HDMI or USB-C DP Alt Mode. There's also a separate mounting arm you can buy. XENEON EDGE Display - The Ultimate Touchscreen Companion - YouTube Watch On You can use the Xeneon Edge for a variety of different things.…