I have a 2010 Macbook Pro with Intel Core 2 Duo and I usually use it for gaming. I wanted to Turbo Boost it but how do I do that?
It's activated dynamically based on the workload. There's nothing you can enable that turns on Turbo Boost.
From Intel's Website for the i7-640M Processor found in the 17" Mid 2010 MacBook Pro:
Intel® Turbo Boost Technology dynamically increases the processor's frequency as needed by taking advantage of thermal and power headroom to give you a burst of speed when you need it, and increased energy efficiency when you don’t.
This applies to all computers with Intel processors with the Turbo Boost technology, not just MacBooks.
Intel® Turbo Boost Technology 2.0 allows the processor to operate at a power level that is higher than its TDP configuration and data sheet specified power for short durations to maximize performance.