[KLUG Members] Re: Hearty Thanks ++ -- IBM/Cyrix 6x86/M1 v. Pentium MMX 233MHz

[Bryan J. Smith]

[ PS, we should really be using HARDWARE for this. ]

On Wed, 2002-05-08 at 15:17, Sirch Namdig wrote:
> So, your claim is that if I set the board to 1.5x the post will
> report 233MHz?

No.  If you set 1.5x it will probably run at a 3.5x multiplier and
233MHz, but the POST _still_ might say 100MHz.  They only way to find
out what speed it is running at is to do some benchmarks v. 100MHz and
200MHz, or possibly some diag tools.

Another issue:

   Pentium non-MMX (P54x) uses 3.3V, a few older use 3.52V Vcc/Vio
   Pentium MMX (P55C) uses split 2.8V Vcc / 3.3V Vio
   IBM/Cyrix 6x86 uses either 3.3 or 3.52V Vcc/Vio
   IBM/Cyrix 6x86L/M2 uses split 2.8V or 2.9V Vcc / 3.3V Vio

Watch that voltage!  Can overheat your CPU or seriously reduce the life
of it.  _Especially_ if you are running an MMX at 3.3V or, gasp, 3.52V
Vcc!  It wants 2.8V Vcc.  If your mainboard documentation has jumper
settings for MMX, it most likely has independent Vcc/Vio settings too.

In case you haven't figured out, Socket-7 does NOT have the
auto-voltaging that Socket-370 and Socket-A (462) do.

-- Bryan

-- 
The US government could be 100x more effective, and 1/100th the
Constitutional worry, if it dictated its policy to Microsoft as
THE MAJOR CUSTOMER it is, and not THE REGULATOR it fails to be.
---------------------------------------------------------------
Bryan J. Smith, SmithConcepts, Inc.   mailto:b.j.smith@ieee.org
Engineers and IT Professionals     http://www.SmithConcepts.com