I don't use TRiXX, it is not recommended for my card. Here is the app_info file I use for the current MW GPU app:

<app_info>
<app>
<name>milkyway</name>
</app>
<file_info>
<name>milkyway_separation_1.02_windows_x86_64__opencl_amd_ati.exe</name>
<executable/>
</file_info>
<app_version>
<app_name>milkyway</app_name>
<version_num>102</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>0.5</count>
</coproc>
<cmdline>--gpu-target-frequency 10 --gpu-disable-checkpointing</cmdline>
<file_ref>
<file_name>milkyway_separation_1.02_windows_x86_64__opencl_amd_ati.exe</file_name>
<main_program/>
</file_ref>
</app_version>
</app_info>

Screen lag is acceptably low (for me). If you do not want to run 2 WUs at a time, change the <count>0.5<</count> value to a 1.0

I underclock the memory in CCC. If you want to know how I will post it.

Thanks swiftmallard for the info.

Here is the app_info file I use.
<app_info>
<app>
<name>milkyway</name>
</app>
<file_info>
<name>milkyway_separation_1.02_windows_intelx86__ati14.exe</name>
<executable/>
</file_info>
<app_version>
<app_name>milkyway</app_name>
<version_num>102</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>--gpu-target-frequency 80 --gpu-polling-mode 16 --process-priority 1</cmdline>
<file_ref>
<file_name>milkyway_separation_1.02_windows_intelx86__ati14.exe</file_name>
<main_program/>
</file_ref>
</app_version>
</app_info>

You can play with gpu-target-frquency to get different amounts of GPU usage. It works backwards from what you think. Raising the number will give you less gpu usage, lowering it will give you more.
If you plan to try it you must complete all the work in your cache first. If you use it before you do that any tasks in cache will be reported as errors. Once you have that file in place you can stop BOINC and make changes to it without that problem. Just make sure you don't move the file.
The file must be placed into the milkeyway project folder, not the BOINC folder. I haven't tried running 2 tasks at a time with this file. You can try it if you'd like by changing the <count>1</count> to <count>.50</count>
Have fun.

I think they are still having some problems. The nightly update was somehow not correct. Maybe it will be fixed tomorrow.

Cheers

Stats wrong Joe? I know I'm crunching with 21 threads but the updates show around 18 days crunched most of the time. PV jail stays around 9 pages. Been like this for over a week.