Don't worry about frying your CPU. The turbo boost only goes that high if it has the thermals to do it. A cooling pad is usually unnecessary. The Helios 300 has a reasonable cooling system. As long as you aren't trying to run it while it is sitting on a bed or something else that blocks cooling vents you'll be fine. Just keep it on a hard flat surface and you won't have to worry about it overheating.
You can trust that assessment too as I have a Helios 300. As long as you keep it on a hard flat surface and aren't pushing it to its absolute limits with benchmarks or stress testing, you won't be thermal throttling.