As more devices come with multiple CPU cores, multi core-friendly CPU tweaking applications and modifications have shown up extensively in recent months. Now, there is an application to control the GPU and both CPU cores on the GSM HTC EVO 3D, as well as modify many other settings.
The application already has a number of features, but it is still under construction. Features that are currently working include:
Full CPU controll(single and dual-core devices)
GPU Overclocking*
Changing buttons backlight
Fastcharge*
Enable/Disable VSYNC
Quickly force both cores online
Completly disabling second core
XDA Senior Member pedja1, who created the app, plans to add the following features in future releases.
IO Scheduler
SD cache
Settings for ONDEMAND governor
thermald control*
mpdecision control*
Undervolting*
Full quad core support
Apply settings on boot
While some important functionality is missing at this time, users can expect this to be added in future updates. For now, it is still a potentially useful application to tweak various CPU, GPU, and system settings.
For additional info, check out the original thread.