Re: AMD update kills Hash rate

Just ran the AMD update. Have 3 5850's running clocked at 900/300 1088volts and have been getting 325Mh consistently. Now....all 3 cards are running under 250Mh.

WTF?

No need to roll back the whole driver. Run the uninstaller for Opencl only, then extract your old driver and install just the old file.

Only downside (of it is one) is that further uninstalls and updates may fail to remove the old cl SDK unless you keep the original installation file.

Was 11.12 the introduction of 2.6? So, I would just need to extra the SDK from the 11.11 drivers?

correct, and correct. rolling back your sdk to 2.5 isn't something the catalyst install manager will do, even if you fully uninstall it (the opencl dlls remain). I kept a copy of 2.5 sdk in a .rar. just unrar it to your drive that has windows installed (if you're running windows) while nothing is accessing opencl (or else you get a permissions error or something) and it should roll back to 2.5. no need to reboot.

this rar may only work with x64 versions of windows.
http://dl.dropbox.com/u/9768004/AMD-APP-SDK-v2.5.rar