Here's a short tutorial how to boost your CPU performance without overclocking.
Note:
1. I've used synthetic benchmarks so real-world situations may not have the same scaling.
2. My CPU is an Intel CPU with hyperthreading(HT), this may not work for AMD CPU and/or Intel CPU's without HT
3. I noticed a jump in idling and load temperatures so have adequate cooling in place as doing this may cause your CPU to thermal throttle resulting in a decrease in performance.
4. For my CPU, whilst the single core performance didn't see a a significant improvement, multi-core performance did.
5. Follow the steps and you shouldn't have any issue, deviate and you might end up with a non-working OS.

Results from my Asus Laptop , i3 2365M, 1.4Ghz. 2C/4T
Geekbench
Before: Single core 1007, Multi core 1849.
After Single core 1076, Multi core 2283 [6.8% and 112% up]
UserBenchMark
Before: Single-25.9pts; Quad-65.2pts;Multi-77.9pts
After: Single-33.3pts, Quad-92.9pts; Multi- 92.9pts [29%, 42%, 19% up]
3dMark(cloud-gate)
Before: Overall 1150 (GPU 1151, CPU 1148)
After: overall 1162 (GPU - 1164, CPU 1158) [Overall 10%; GPU-11%, CPU-0.8%]

Tutorial notes - https://drive.google.com/open?id=0B5gP1lXvmMe5SkdRT0o0SzNlV1U
Screen Shots - https://drive.google.com/open?id=0B5gP1lXvmMe5UWRzYmhEaGoxNzA

Video tutorial is being uploaded, 'twill take a while to update...I'll post when that's available.

Sorry for the poor quality video

https://drive.google.com/open?id=0B5gP1lXvmMe5XzJQa0ZHUTBYZUk

This must be done very carefully and to the letter. Boards & CPUs are likely to fry & get burnt up if not well managed.

chachanga:
This must be done very carefully and to the letter. Boards & CPUs are likely to fry & get burnt up if not well managed.

Na to buy fire extinguisher just in case lol.
Anyway, motherboard and CPUs usually have an operating limit so knowing what the maximum operating temperature allowed for the CPU will be a bonus. Intel info can be found at http://ark.intel.com/m/ Search for your processor to show limit.