If you ever get CPU Taks on it again i'd check Tasks Manager when one is running.
On my 12 thread system, a single CPU Task used 8 threads. So on that 8 thread system, i'd expect CPU usage to be 100% just for the single Task. The fact it was lower (and very variable), and took such a long time indicates something else was there using CPU time as well.

New app was released and there are new tasks

0.03 (nvidia_alpha)

I used the <project_max_concurrent> line in the app_config.xml file to only allow the computer to run a single task at a time. And it did actually finally complete two tasks so far (running one at a time) after about 12.5 hours each. So it looks like they can actually finish successfully on CPU, it just takes a LOT longer than the 30 minute target goal in the preferences settings. And probably a huge amount longer if running multiple tasks at the same time.

Just on it's own, the TTAFold would have used 100% of your CPU, that fact that it was showing as 30-70% indicates there were other things (other BOINC projects?) trying to use the CPU at the same time, hence the extra long processing time. Otherwise your crunching time should have been around the 4 hour mark or there abouts.

I set up the app_config.xml file to only allow the computer to run a single Ralph task at a time and rebooted and all tasks reset to zero progress and it is now running the one task by itself and using around 3-4 of the 8 CPU threads. I'll watch it for a while to see if it can manage to actually complete a task with this configuration.

<core_client_version>8.0.2</core_client_version>
<![CDATA[
<message>
The access code is invalid.
 (0xc) - exit code 12 (0xc)</message>
<stderr_txt>
'C:Program' is not recognized as an internal or external command,
operable program or batch file.

</stderr_txt>
]]>

Target computation time is set at 1 hour.

The 4 running tasks are still "running" with zero estimated time left after 32 hours. I want to just kill the tasks, but also have a bit of morbid curiosity to see if they will actually finish...

i'd suggest to use a HWiNFO64 or MSI Afterburner to measure if it really is using GPU..

Btw why it runs 4 tasks ? It is only possible if your machine has 4 GPUS, otherwise it would require custom app config to make it run in parallel ...

All tasks downloaded on a laptop with an i7-8650U CPU failed due to missing/corrupt data in the downloaded ZIP file. And only one task actually ran for a few seconds. The others all failed at zero seconds of run time.

<core_client_version>7.24.1</core_client_version>
<![CDATA[
<message>
The access code is invalid.
 (0xc) - exit code 12 (0xc)</message>
<stderr_txt>
[venv_a_pred_alpha_179.zip]
  End-of-central-directory signature not found.  Either this file is not
  a zipfile, or it constitutes one disk of a multi-part archive.  In the
  latter case the central directory and zipfile comment will be found on
  the last disk(s) of this archive.
unzip:  cannot find zipfile directory in venv_a_pred_alpha_179.zip,
        and cannot find venv_a_pred_alpha_179.zip.zip, period.

</stderr_txt>
]]>

https://ralph.bakerlab.org/results.php?hostid=49652&offset=0&show_names=0&state=0&appid=14

<core_client_version>7.24.1</core_client_version>
<![CDATA[
<message>
The access code is invalid.
 (0xc) - exit code 12 (0xc)</message>
<stderr_txt>
[venv_a_pred_alpha_179.zip]
  End-of-central-directory signature not found.  Either this file is not
  a zipfile, or it constitutes one disk of a multi-part archive.  In the
  latter case the central directory and zipfile comment will be found on
  the last disk(s) of this archive.
unzip:  cannot find zipfile directory in venv_a_pred_alpha_179.zip,
        and cannot find venv_a_pred_alpha_179.zip.zip, period.

</stderr_txt>
]]>