BIOS change settings / GPU's underclock feasible !?

[Johnny_P]

Good afternoon,

Because I am new in this forum and also in this topic, I have some doubt regarding to some changes/modifications on system performance:

- considering that I want to use MULTIMINER it is feasible to made changes in BIOS of system ? (I will use Ubuntu on 64 bit);
- it is feasible to underclock GPU's (I will have in my mining system 2 types of GPU's: NVidia 6Gb and AMD 8Gb) considering that I want to mine more currency ? what currency I should use as reference in my optimization of energy consume/performance ?

I waiting with higher interest your feedback with suggestions and remarks.
hanks in advance to all members of community for support.

Keep in touch.
Kind regards.