the generations of the cards are to far apart and support different versions of open cl which will cause one of the cards to crash no matter how you do it
long story short no matter how you do it its not going to work
Got it to work.
1. Checked out files named amdocl64.dll, amdsc64.dll and OpenCL.dll (in C:\Windows\system32) and amdocl.dll, amdsc.dll and OpenCL.dll (in C:\Windows\SysWOW64). If they don’t have the same date, they are likely the cause of the problem: it seems that the AMD APP SDK Runtime installer/uninstaller has trouble updating/removing them, so you end up with some from a version and some from another version, which just isn’t able to work.
2. Uninstall the AMD APP SDK Runtime, for me I ran setup.exe in
C:\AMD\Support\13-1-legacy_vista_win7_win8_64_dd_ccc
3. delete any of the remaining files spotted in 1. that may be left in system32 and SysWOW64
4. reinstall the AMD APP SDK Runtime. I installed an older version.
AMD-APP-SDK-v2.5-Windows-641 (v2.8 had the same issues)
5. reboot, I didn't need to but it might help.
