I used to swear by MBM.. but after installing it a few months ago for the first time since 2001 it doenst appear to be supported anymore.
I would suggest Nvidia Ntune if you are using an Nforce board. I'm using it right now.. you can change bios options with it, its easy to understand, you can change fan speeds on the mobo/GPU/whatever.. setup warnings for temps ect
Otherwise, I'd look next to brand specific utilities like Asus Probe ect. depending on the brand.
Ntune is excellent and theres no setup at all since its clearly for NV hardware.
Check out the board manufacturers site or your boards software cds.