|What is it that you are asking?|
dbi gain is a value that is normal applied to a signal amplifier. That can be sound, vision, RF transmission or data transmission.
It is not something that can be applied to a computer in its entirety.
I have taken the liberty of removing you Email address, It is not a good idea to put it on an open forum as it will attract ever spammer from her to Archangel. Besides, the idea is that you ask a question and someone answers it here then everyone gets to see, including you. Personalised answers cost money.