Motherboard manual has pins to connect the switch but it's labeled as "function reserved". Followed by this:
Unusual that it says not to use it when power is on, as the benchmarking w/o cache thread mentions doing this during realtime benchmarks. Certainly not going to try it until I can get more info from you guys.
The manual for my GA-586HX says the same thing. If I remember it right, it doesn't threaten with anything worse than lockups etc. Managed to switch it accidentally a few times when the computer has been powered on though, and it seems to work just fine at the new clock afterwards.
That being said, I won't guarantee it's a good idea to do it, just that I've personally never experienced any problems when doing it.
Hmm.. 60MHz method ? The Pentium uses a 60-66MHz Front-Side-Bus (FSB) I think.
Maybe the tubo switch is slowing down the whole mainboard to an XT compatible speed.
If you do this when PC is running, it could become unstable or crash. Perhaps that's because the manual warns about it.
It is just an idea, though. Better wait what other users have to say. I'm not that of a Pentium person so I may be wrong.. 😅
"Time, it seems, doesn't flow. For some it's fast, for some it's slow.
In what to one race is no time at all, another race can rise and fall..." - The Minstrel
//My video channel//
I never heard that at least one P1-mobo can do turbo switch. Were they so? (I think no.)
Turbo switch button is present just because it was present on all AT cases at that times. Pentium was a first platform with eliminated turbo function.
It might lead to data corruption or something if you switch it on while doing something due to how significant the speed difference is between what Turbo aims for and the P1 166, or could turn caches off leading to that data being tossed out too.
My pentium pro board had one of these options in bios. Took me hours to figure out it was slowing my machine down to 8088 levels.
It is a mistake to think you can solve any major problems just with potatoes.
wrote:I never heard that at least one P1-mobo can do turbo switch. Were they so? (I think no.)
Turbo switch button is present just because it was present on all AT cases at that times. Pentium was a first platform with eliminated turbo function.
The first older pentium 1 motherboard still had this turbo function on the board.. Later pentium 1 boards this option was removed.. Sometimes you only could connect the turbo LED to the motherboard, but there was no turbo switch header on the board. That turbo led function on the later pentium 1 was only a cosmetic thing.
~ At least it can do black and white~
Yes, I vaguely remember that I have seen such 586s, too..
I think 286/386/486 PCs often used either wait states for throtthling or halved the frequency (f. chipset/processor).
More recent 486/586 machines disabled their caches instead (perhaps because of VLB/PCI).
But as I said, I'm not that of a Pentium person.. Maybe my memory is playing tricks on me, dunno.
"Time, it seems, doesn't flow. For some it's fast, for some it's slow.
In what to one race is no time at all, another race can rise and fall..." - The Minstrel
//My video channel//
My first Motherboard with Pentium 75 can be slowed down by Hotkey (ctrl) + (alt) + (-) to 8 MHz or normal speed by (ctrl) + (alt) + (+).
The board has a connector for the Turbo LED.
wrote:Motherboard manual has pins to connect the switch but it's labeled as "function reserved". Followed by this: […]
Motherboard manual has pins to connect the switch but it's labeled as "function reserved". Followed by this:
Unusual that it says not to use it when power is on, as the benchmarking w/o cache thread mentions doing this during realtime benchmarks. Certainly not going to try it until I can get more info from you guys.
So it's basically just an external jumper switch 😜
Someone mentioned the possibility of disk corruption, which does sound plausible.
