If you ever have problems with Fruity Loops clipping when it reaches max CPU, you should try using the Smart Disable for all Plugins macro. Generators and effects that are not being used in FL Studio may be taking up valuable CPU power.
If you are a messy FLooper and add too many effects your FL project make sure you run this macro on your project from time to time. In the past I have had tunes that max out my CPU (at 5ms buffer length using ASIO) and the last resort has either been to manually delete plugins or run the Smart Disable for All Plugins macro.
The Smart Disable for All Plugins can be found in the Tools menu under Macros.