Hello,well Catalyst 10.5 is good for directx 10 and 10.1 but still really slow in unigine heaven benchmark useing derectx11 and I have issues with micro twiching and flashing and horizontal lines in unigine heaven and tropics benchmarks as well as the last remnant benchmark in november when I ran last remnant benchmark and there was no problem with it and I was useing Catalyst 9.10 and was getting 120fps and with every driver since then it crashes and if I can get it to run now with Catalyst 10.5 I only get 21fps and when I got it to run on Catalyst 10.4 I was only getting 27fps that is if it does not crash I want to know why directx9 games have a lot of troubles running on 2 sapphire HD5870 in crossfire mode and in single mode as well I also have friends that have other HD5**** series cards and the perfomance of directx9 games are so bad and why does it seem to be really slow on directx11 as well. oh well atleast this Catalyst 10.5 has decent derectx10-10.1 but the problem with display drivers stoped responding and grey screen of death and black screen of death which people call GSOD or BSOD which locks up and freezes the computer to the point of useing your power button to restart the computer was not fix and it seems to do with directx9 games the most please fix this its been a problem for 6 months now and I am tired of watching my computer crash more than I am playing games.