[REQUEST] Acer Aspire 5740g

Hello, i have an Acer Aspire one 5740g with this version of BIOS: 1.28
Direct link:http://global-download.acer.com/GDFiles/BIOS/BIOS/BIOS_Acer_1.28_A_A.zip?acerid=634381752096040462&Step1=NOTEBOOK&Step2=ASPIRE&Step3=ASPIRE%205740G&OS=ALL&LC=it&BC=ACER&SC=EMEA_17

I need to underclock Ram, but this bios doesn't let me do that, please let me know if it's possible to have a bios that let me do this.
I searched so much on the internet but there isn't nothing that can be useful for me.
do i have to install the modded bios in this way:https://www.bios-mods.com/forum/Thread-HOW-TO-FLASH-MODIFIED-OR-ORIGINAL-BIOS
Thank you very much

                  -BlueJay