I have a couple of machines w/ turbo buttons in my basement. I recycled the steel of like 5 of them a couple of days ago. I still have a couple.
ll it does is overclock a bit. Like I have a pentium 200 that will oc to 233.
The ironic thing is that I see see computers come in for repair that have turbo buttons on them. The customers always ask me what they can do to upgrade it. I say "Bury it, and buy another computer."