In a message dated 07/10/2000 4:35:20 PM Eastern Daylight Time,
[log in to unmask] writes:

<< What would be the best frequency option for a PIII FC-PGA 533 running on a
 66/100 FSB motherboard?
 Any experience in running fc-pga 533 as a 550(5.5 x 100)
 My mobo doesnt have, (expressed) a 133 mhz fsb
 TIA
 Roberto Safora
  >>
Hi,
  All Intel CPU's since the PII have been multiplier locked. That means they
are set at the factory to run at a certain multiplier, and can't be changed.
The PIII/533 is designed to run at a front side bus (FSB) frequency of 133Mhz
with a multipler of 4.0. Since the multiplier of 4.0 can't be changed, the
fastest you will be able to run it on a 100Mhz motherboard is 400Mhz (100Mhz
x 4.0).
 Also be aware that the FC-PGA has a *slightly* different pinout than a
standard socket 370 does. If the motherboard only supports 100Mhz FSB, then I
would have serious doubts as to whether you can run a FC-PGA chip on it
(unless it is a Slot-1 board and you are using an FC-PGA compatible slocket
adapter).

HTH,
Peter Hogan
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