Multiplier is also controlled by jumpers.
the P133 must be compatible with a 1.5 multiplier.

I can try also a reserved setting for 100mhz.

Don't know if this on this board works.

but what is better for overall performance?
60 Mhz FSB x 1.5

or 50 Mhz FSB x 2

Sammy wrote:

I can try also a reserved setting for 100mhz. […]
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I can try also a reserved setting for 100mhz.

Don't know if this on this board works.

but what is better for overall performance?
60 Mhz FSB x 1.5

or 50 Mhz FSB x 2

I guess your motherboard hides the fact that some jumpers are for FSB and others are for multipliers, either that or it's actually wired so some jumpers do both settings ?

I have not compared those settings, the numbers I have are more on the other side of the spectrum (166 to 233 MHz).
So I could only try to guess, but I don't like to do that, especially when it's a tough call like that.
you should run Phil's benchmark suite and find by yourself 😀 I don't think there'll be a clean cut, some things will be better with higher FSB frequency, other with higher core frequency, depending on how well they use cache or if they are bottlenecked by some I/O ops.

Your Pentium has an unlocked multiplier. I have a Pentium 120 that is the same. I've run it at 75, 90, 100, 120, and 133. I assume all P54Cs have unlocked multipliers? Does anyone know for sure?

Regarding the 100Mhz reserved setting, assuming it properly adjusts the multipliers (1.5x66.6Mhz), then there is no reason it would not work on your Pentium 133. You can always try. 😀

I suppose this is a "Premiere II" board?
The original Premiere was only for 60/66 MHz Pentiums (5v ones, use different socket from later 75-200 MHz models).
As it seems, the Premiere II only supports 75, 90 and 100 MHz CPUs. Which would mean that the multiplier is locked at 1.5x, and the FSB can be set to 50, 60 and 66 MHz respectively.
Since the motherboard has to provide the correct multiplier to the CPU, the 100 MHz setting is probably the best you can get (assuming it is indeed 1.5x 66 MHz).

is there a tool that shows FSB speed?
For Dos or win3.11?

I believe Speedsys does. It's part of Phil's VGA Benchmark bundle.

There's also CHKCPU which should tell you outright in much less time, this (and SpeedSys) are included in my own, more stylish, suite; http://www.mediafire.com/download/ii8qs1i7whd … es/SUIT101R.zip

You can usually work out any missing values anyway. For example, dividing the CPU Clock by the FSB will give you the multiplier, or dividing the CPU clock by the Multiplier will give you the FSB, simple mathematics.

I've switch the Jumper to the reserved Position and Bios and Setup of Screamer2 says now: Pentium 100 Mhz.

Hope i do not need a better cooler... this cooler is from a Pentium 75.
Now it have to cool an underclocked Pentium 133.
I'll have a look at that.

I changed the 516 MB and 2.1 GB fujitsu HDDs , against a IBM 10GB.

Had to install IBM DISK Manager First, or i can't get access of full disk (bios limit)

Win95 will now not start anymore, seems the xcopy /e to copy from old to new hdd is not enough. (lost long names)

Will do a fresh install of WIN 95.
Hope it will not overwrite the Disk manager.
setup /ir should work well.