Biostar TB250-BTC DRAM Voltage

Hello,
My only options to set the DRAM voltage in BIOS are 1.20V, 1.35V and Auto, Is it possible to unlock manual voltage by BIOS modding?
Thanks

@KristjanValm - What BIOS are you using? I checked 413 and I see only these options
One Of Option: Auto, Value (8 bit): 0x0 (default) {09 07 23 18 30 00 00}
One Of Option: 1.35V, Value (8 bit): 0x1 {09 07 24 18 00 00 01}
One Of Option: 1.42V, Value (8 bit): 0x2 {09 07 25 18 00 00 02}

I may be able to adjust those, but I’m not 100% Sure. What is your ideal voltage?

my ideal voltage usually is something around 1.32v or at least a little reduction, im using B25DF222 bios (2018-02-22), it would be useful I there was a manual override option but I can only set 1.2 and 1.35

I need to test my RAM stability with lower voltages then I know but right now im running 1.35v