tag:blogger.com,1999:blog-4202507793705383029.post2167050956438318900..comments2023-10-26T01:41:49.462-07:00Comments on The home of a Very Grumpy Bunny: ATi OpenGL 3.x / 4.x performance: something's not right hereAnonymoushttp://www.blogger.com/profile/08951185953504736035noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-4202507793705383029.post-83021924976085117272012-12-06T08:42:32.698-08:002012-12-06T08:42:32.698-08:00I have the same issue with my Alienware M17x R1 la...I have the same issue with my Alienware M17x R1 laptop running 2 ATI 5870m which are desktop 5770 cards with slower clocks.<br />I get horrible, stuttering mess with Crossfire on, in OpenGL only!<br />In DirectX games that us the Unreal Tournament 3 engine, run phenomenally well in DirectX.<br /><br />All drivers from 2010-2012 have varying degrees of slow speeds with crossfire.<br /><br />Even in single card configuration mode, a 5870m is SLOWER in OpenGL then a GTX 260m, which is based on the G92b part (Desktop 8800gts).<br /><br />ATI does NOT care about OpenGL performance at all with these cards, they've given up working on them.Anonymoushttps://www.blogger.com/profile/05568999455374323662noreply@blogger.com