Date: Sun, 8 Sep 2002 14:23:21 +0100
From: "Alex Slater" <[EMAIL PROTECTED]>
Subject: Successful 70CT overclock


Thanks for all the good advice here (currently and in the archive), I
Successfully overclocked my 70CT to 150Mhz.

I was going to go for 166Mhz but after looking at the pins on the chip,
looking at my soldering iron, and then weighing up my soldering skills Vs
16Mhz more (though the faster bus speed would've been nice) I decided
against it. 150Mhz will do just fine :-)

One thing I noticed, I was testing my machine after doing the overclock and
I hadn't put the RAM expansion back in, and I was amazed at how much slower
Win95 was on 16Mb. I actually thought I'd managed to underclock the CPU !

Running at 150Mhz gives around 22% better integer performance, and 25%
better floating point performance.

Here's some before and after benchmarks (from Wintune 97).

Standard 70CT @ 120Mhz (60 x 2) :
  [CPU]
  CPU type=Intel Pentium P55C with MMX
  Clock rate=120 MHz
  CPU load=0%
  Dhrystone=216 MIPS
  Whetstone=68 MFLOPS
  CPU class=586im
  CPUID1=0x0543 0x8001BF
  WTA version=1.5.12

  [MEMORY]
  Installed RAM=32 MB
  Windows RAM=31.6 MB
  Free RAM=0.102 MB
  Memory used=88 %
  RAM Read avg=249 MB/s
  RAM Write avg=37 MB/s
  RAM Copy avg=29 MB/s

Overclocked 70CT @ 150Mhz (60 x 2.5) :
  [CPU]
  CPU type=Intel Pentium P55C with MMX
  Clock rate=150 MHz
  CPU load=0%
  Dhrystone=264 MIPS
  Whetstone=85 MFLOPS
  CPU class=586im
  CPUID1=0x0543 0x8001BF
  WTA version=1.5.12

  [MEMORY]
  Installed RAM=32 MB
  Windows RAM=31.6 MB
  Free RAM=0.109 MB
  Memory used=82 %
  RAM Read avg=291 MB/s
  RAM Write avg=37 MB/s
  RAM Copy avg=29 MB/s

Thanks again for all the help.

Regards,
 Alex.




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