oclHashcat 1.31 Fan control issue

[epixoip]

I'm not too familiar with Windows, but from the symptoms you are describing, I presume that method is only setting it for the default profile and not the performance profile. When oclHashcat switches to the performance profile you lose your fan setting, then when it switches back to the default profile you get it back.

Have you tried using something like MSI Afterburner instead?