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Installing Win95 OSR2 on P-75?

Posted on 1998-01-22
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Last Modified: 2013-12-16
I heard that Win95 OSR2 was designed to run on a P-133 or better.  Will it run ok on a (Cyrix) P-75?
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Question by:iwona
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nebworth earned 200 total points
ID: 1753569
  Well, yes, if anything will run on the Cyrix...

      P-75 or P-75+???
    Well, actually, Windows95 will run on anything down to a 386...  of course, who would want to?  Even OSR2.  Basically, the operating system requires such overhead that it was determined that the P-133 had sufficient performance specs to allow the system to operate without significant delay...  It will run on the P-75.  In fact, it will even recognize the processor correctly, but it will be slightly sluggish.
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by:iwona
ID: 1753570
It is quite possibly a P-75+.  I plan to upgrade to a Cyrix 6x86 P-133+ in the near future but in the meantime I want to install Win95 OSR2 on a new hard drive and run it for a week or so.
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by:nebworth
ID: 1753571
  6x86 is P-75+.  The P rating on the 5x86 is P-75.  The 5x86 is  kind of a souped up 486, the 6x86 tries to be a Pentium.  If your budget is tight, then the 6x86 is a fine chip (provided it works), but for performance, I would recomment Pentium, Pentium MMX, or K6...  Remember that the cpu speed setting for the P-133 + is not 133, but I believe 110, which is 55x2, so if your board does not have a 55Mhz bus speed setting, you will not be able to run at P-133+, but you will be able to underclock it at the P-120+ speed (100:50x2).  Use a good fan, and set your voltages properly.
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by:nebworth
ID: 1753572
  Actually, only the 5x86 133Mhz has a P-75 rating.  Incidentally, if you do have a 5x86 you will have to upgrade with both a board and chip, and you have to make sure you have enough memory to fill a bank. (Generally, pentium class boards require two matched SIMMS per bank).  If you have the 6x86, you only need the chip.
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