Hello and welcome to TT forums.
As for your cpu / memory / bios question, it is recommended that you flash to the latest version for your board. The latest version is going to contain the fixes/patched from the previous versions.
Also any cpu AMD or Intel will always overclock (cpu or memory) better with only 2 sticks of ram vs. 4 sticks. Anything over 1066 or 1333 is technically overclocking so some tweaking is going to be needed. Another thing not all cpu's or memory are the same so what you may see what someones cpu can do does not necessarily mean your will do it also.