1) Check if your RAM module is not listed in RAM_blacklist.txt . If it is, you're unlucky for now. You have to replace it with another one. See RAM_whitelist.txt for recommendations. 
2) Select BIOS build to flash. Better start with ..._156.ROM file for the first time. See filename_format.txt for guidlines.
3) Set SHE (Super Hybrid Engine) to HPM (High Performance Mode) before flashing.
4) Flash selected build. EZ Flash (aka Alt+F2) method is recommended.
5) After succsessfull flashing and power cycle, disable Boot Booster in BIOS Setup (on Boot screen).
If you don't see Boot Booster item you have probably repartitioned your SSD, and Boot Booster is disabled by default in you case.
6) Boot Windows and set SHE to SPM (Super Performance Mode).
7) Run CPU-Z (Everest, CoreTemp etc.) to check CPU frequency. FSB to core ratio (aka multiplier) may change from 6 to 10, based on your powersave settings and CPU load, but FSB frequency must be correct (about 156 MHz for ...156.ROM build).
8) Run stability test (Everest, S&M, OCCT etc.) for not less than 30 minutes and see if everything works fine.
9) Enjoy!
10) Try to repeat steps 2...8 with another BIOS file, with higher frequency setting. Find the build with maximum CPU frequency that works stable on your hardware.