Only 12h? This is kind of a joke...

Robert-this is finishing the remainder of a promise we made awhile back. 12 hours is the remainder of what we owe the users.

...... 12.1 Drivers, what are release day RC drivers ??? 

Thats your problem. 12.1 does not support 7970s. You need the AMD drivers release for 7.XXX. The problem is its now the brave world of OpenCL, and to get the 7970 running OpenCL apps, you need the drivers they released when 7970s were released. Those drivers do not support CAL, as CAL is officially dead. So the new drivers are native OpenCL written for the new GCN architecture of 7970s. Without them, and running 12.1, the card just sits and cycles doing nothing because its looking for OpenCL support and can only see CAL which it doesnt understand - or doesnt seem to. DNETC have a CAL app nearly running on a 7970, but I'm not convinced they will finally do it ... see what happens ..

Guru3D are carrying them, these are the next version after the release day set - its an RC - Release Candidate - set, but they work fine

http://downloads.guru3d.com/download.php?det=2844

Load those up, and you should be fine. I copied my app_info below just in case:

<app_info>
<app>
<name>milkyway</name>
</app>
<file_info>
<name>milkyway_separation_0.82_windows_x86_64__cuda_opencl.exe</name>
<executable />
</file_info>
<app_version>
<app_name>milkyway</app_name>
<version_num>82</version_num>
<flops>1.0e11</flops>
<avg_ncpus>0.05</avg_ncpus>
<max_ncpus>0.5</max_ncpus>
<plan_class>ati14ati</plan_class>
<coproc>
<type>ATI</type>
<count>0.5</count>
</coproc>
<cmdline>--gpu-disable-checkpointing</cmdline>
<file_ref>
<file_name>milkyway_separation_0.82_windows_x86_64__cuda_opencl.exe</file_name>
<main_program/>
</file_ref>
</app_version>
</app_info>

Regards
Zy

You can find the applications right here on Arkayn´s page: http://www.arkayn.us/forum/index.php?action=downloads;cat=11

thanks it works:)
dowload NVidia and edit app_info to

<app_info>
  <app>
  <name>milkyway</name>
  </app>
  <file_info>
    <name>milkyway_separation_0.82_windows_x86_64__cuda_opencl.exe</name>
    <executable />
  </file_info>
  <app_version>
    <app_name>milkyway</app_name>
    <version_num>82</version_num>
    <flops>1.0e11</flops>
    <avg_ncpus>0.05</avg_ncpus>
    <max_ncpus>1</max_ncpus>
    <plan_class>ati14ati</plan_class>
    <coproc>
      <type>ATI</type>
      <count>1</count>
    </coproc>
	<cmdline></cmdline>
    <file_ref>   <file_name>milkyway_separation_0.82_windows_x86_64__cuda_opencl.exe</file_name>
      <main_program/>
    </file_ref>
</app_version>
</app_info>

If I were you I'd bite the bullet now, and plan out a migration route, before reality forces it on you in a hurry.

Regards
Zy

XP support was dropped from the latest SDK release

Can an HD580, as the prime GPU, be crossfired with an HD4850?