Bios Mods -The Best BIOS Update and Modification Source

Hi. I have an HP laptop with an nVidia GPU. The GPU is set to downclock when it reaches the temperature of 67°C. I would like to increase this temperature by accessing advanced options in my BIOS. Is it possible? Here is the link to the original BIOS:

ftp://ftp.hp.com/pub/softpaq/sp76501-77000/sp76803.html

Thank you very much!