OT: BIOS editting?

[AgentZero]

Once again, I would like to prevail upon the vast depository of knowledge that is this forum, and ask if anyone can tell me how to edit BIOS settings. I've been having a few problems with the ol' machine speedwise, and I know there's a few BIOS settings I can tinker with to get a speed boost. Problem is, I can't actually figure out how to do it on my current machine. On the old one it was a simple matter of hitting F12 while the PC was booting, but this doesn't seem to work on the new machine. Neither do any of the other 'F' keys. Before you ask, I do have a pretty solid grasp of things like BIOS editting, it's just been a while since I've done it and manufacturers seem to have changed the way one actually accesses the BIOS editor.