Is paging activated? Is virtual memory activated set to work off your RAM size (automatic allocating)? Now if that's true, is your HDDs set to sleep or power saving? I'm not positive but TG may respect windows governing, and thus not have access to write to and from memory (virtual memory is a stepping stone for RAM when activated) and just hang on to what it has retrying. HID interaction will reset power saving rules.
Because this is solved by a HID issue, this is a result of something governing system performance somewhere, such as HDD hibernation, PC power settings, etc, etc. I believe some antivirus programs also can control these features. I believe I remember this from using Eset Node32.
If you fear a heat issue it's best to use a custom fan arc and try to target a low number to go 100% to try and manage the CPU at a lower overall temp range. Contrary to popular belief this won't "wear" your fans more than any other use, as lifetime warranties and specifications are based on full RPM.