Well, I wish it was as simple as power management, but turning that off in
the bios and windows is the very first thing I did after installing the CPU.
As for the CPU overheating, I really doubt it, but it is worth looking into.
I have what appears to be a good fan attached to the CPU, one designed to be
used the way I am using, with the heat transfer goop on it as well, and I
have an additional case fan that brings in cool air from the room. All
appear to be working. As for the suggestion that the CPU speed is
incorrectly set, it is not. I have checked that setting and played with it
enough to be sure that it is correct. It is also worth noting that the
number of cycles each iteration takes matches extremely well with the time
reading if and only if my CPU is set to 750 in the preferences. At this
point I think it might be something with my memory, because that could
explain the CPU running at full speed but not mprime or prime95. Does this
seem like a reasonable explanation (I have 128M of PC100 sdram in one dimm)?
The Athlon 550 I mentioned only had PC133 (or was it 166), but I can't
imagine that making a 550 outperform a 750 by nearly 10 times. Anyway,
thank you again for your help.
-Conor
----- Original Message -----
From: "Brian J. Beesley" <[EMAIL PROTECTED]>
To: "Conor McCutcheon" <[EMAIL PROTECTED]>
Sent: Tuesday, February 08, 2000 11:18 AM
Subject: Re: Mersenne: AMD Athlon problems
> On 7 Feb 00, at 23:25, Conor McCutcheon wrote:
>
> > I have a new athlon 750 running either prime95 or mprime 24 hours a day,
> > but I am getting a ridiculously slow per iteration time for a 9.5
million
> > range exponent (1.192 sec avg).
>
> Try turning off the power management, it's possible that the system
> is running in "slow" mode due to apparent non-activity of keyboard
> etc.
>
> The M/B should have temp sensors for the CPU. If you can't read these
> whilst Prime95/mprime is running (usually the M/B supplier does
> include a disk with a Windoze monitor program) you should be able to
> read the CPU temp from the BIOS. If the CPU gets too warm then it
> will probably drop its speed.
>
> I believe Athlons do require a special cooling fan & PSU, if the
> system was supplied with substandard components then it could quite
> easily be overheating.
>
>
> Regards
> Brian Beesley
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