[Problem] I can't find the spi Bios chip on my poweredge r720xd

I’ve been trying really hard to look around, but I think Dell really wanted to hide it and I want to extract the rom so that I can modify it and give it resizable bar and increase performance for my computer. All I’m seeing is posts about r710 bios and the idrac of the r720xd ,but I don’t know where the heck it is because I’ve searched around and its really freaking hard to find.