You can reduce the GPU load by using the app_info.xml file and utilising the wait factor as per below:

Wait factor: w (default 1.0)
The app tries to release the CPU during the the GPU computations. It does so by predicting the runtime for the GPU calls and send the CPU thread to sleep for that time. One can manually correct the prediction of the application with this factor. When raising it, the CPU thread sleeps longer, decreasing the value will lead to some faster polling. Setting this value to 0.0 turns off the release of the CPU. Default is of course a value of 1.0.

If you see a low GPU load, you can try to decrease it (if you have a load of 80%, set it to 0.8). If you see a high CPU load, a slight increase of this value may help. Increase it too much and it will affect the crunching speed. You could use this for throttling of the GPU in case the high GPU load leads to a very sluggish behaviour of the user interface or even VPU recover events.
Setting w1.1 could improve the situation (see also the n and f options).

Example:
<cmdline>w1.3</cmdline>

This would increase the sleep time by 30% in relation to the prediction.

More relevant information can be found here. Downlaod the relevant optimised application and read through the readme.txt.

Is the temp high? Maybe you could turn the fan speed down ?

Edit:
Also worth checking the dust bunnies on the case, cpu, psu and card fans. If they are clogged up, the heat inside the case will build up. Cleaning them out should bring it down a few degrees, and you may be able to then reduce the card fan speed.