Demonstration of low 2D performance on the classic theme Windows 7. Program 2DTest draws a grid of lines of black, red and blue colors (sequentially) and calculates the draws time. This problem is present on the Radeon R7 360 2G (2016 release) with driver from Catalyst v15.7.1 to Crimson v18.4.1 (any versions). ============== 2D Test Downloads (2DTest32.exe + source code) https://github.com/JMKh3r/2DTest/releases/tag/184.108.40.206 ============== Results: "Windows AERO Theme" 5..8 msec - good performance "Windows Basic Theme" or "Windows Classic Theme" 130..170 msec - bad performance. Very low performance! ============== VIDEO this bug - "bandicam 2018-05-09 13-28-33-165.avi" (48 Mb): http://my-files.ru/e6my9x or http://files.dp.ua/file?source=18050914003256042469 or https://ru.files.fm/u/q2fepmry P.S.: In addition, on the old graphic card HD4670 (2009 release) + Catalyst v13.9 there is no problem. How to fix 2D performance on the Classic theme Windows 7 ??