Just upgraded catalyst 15.7 on my radeon 7870. After the upgrade the screen is nearly un-viewable. Appears to have something to do with the pixels just a mess of colors. Went back to catalyst 14.4 and it works fine.
It has done this under both Windows 7 and 10, so I don't believe it is the operating system but something to do with video card and the driver. I have a Intel Core i5-3570K Quad-Core Processor 3.4 GHz 4 Core LGA 1155 - BX80637I53570K and a AS Rock LGA1155 Intel Z77 Quad CrossFireX SATA3 USB3.0 A GbE MATX Motherboard ,The card is a Gigabyte AMD Radeon HD 7870 2 GB GDDR5 DVI-I/HDMI/2x Mini-Displayport PCI-Express 3.0 Graphic Card GV-R787OC-2GD. I've spent 3 days fighting with this and don't have a clue.