Re: Mersenne: Interesting/Annoying Mersenne Side-Effect

2000-01-13 Thread Pierre Abbat

On Thu, 13 Jan 2000, gregory czajkowski wrote:
>Hello All,
>
>I've been involved in GIMPS for about 2.5 years now, several machines,
>OSes. Recently I installed prime95 on a IBM Intellistation Dual uproc. 
>It seems my combination of  soundcard+headphones is VERY sensitive
>since when I'm running 1/2 prime95s I can "hear" them chugging along on
>the headphones. There is a low volume high pitch periodic (2/s) noise
>emanating from the speakers. As soon as I turn prime95 off, it ceases.
>The volume setting has no effect on it. 
>
>Has anyone else had this problem? I'm pretty sure its a faulty sound-card,
>just wondering if anyone had an idea on how to fix it.

I run prime95 on a machine at the office and mprime here. I can hear it running
on the machine at the office. The sound card on the box running mprime doesn't
work in Linux, and it's a 486 anyway so it's doing factoring. The box at the
office is a Pentium.

phma
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Re: Mersenne: Interesting/Annoying Mersenne Side-Effect

2000-01-13 Thread Bryan Fullerton

On Thu, Jan 13, 2000 at 06:23:07PM -0600, gregory czajkowski 
<[EMAIL PROTECTED]> wrote:
> 
> I've been involved in GIMPS for about 2.5 years now, several machines,
> OSes. Recently I installed prime95 on a IBM Intellistation Dual uproc. 
> It seems my combination of  soundcard+headphones is VERY sensitive
> since when I'm running 1/2 prime95s I can "hear" them chugging along on
> the headphones. There is a low volume high pitch periodic (2/s) noise
> emanating from the speakers. As soon as I turn prime95 off, it ceases.
> The volume setting has no effect on it. 
> 
> Has anyone else had this problem?

Yep, I've experienced this as well, on a Seanix (clone) Celeron 333 at work.
Haven't bothered to fix it, don't use the sound that much.  Doesn't seem to
happen on my P3/450 at home, where I do use the sound a lot.

Bryan

-- 
Bryan Fullertonhttp://www.samurai.com/
Core Competency
Samurai Consulting
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Mersenne: Interesting/Annoying Mersenne Side-Effect

2000-01-13 Thread gregory czajkowski

Hello All,

I've been involved in GIMPS for about 2.5 years now, several machines,
OSes. Recently I installed prime95 on a IBM Intellistation Dual uproc. 
It seems my combination of  soundcard+headphones is VERY sensitive
since when I'm running 1/2 prime95s I can "hear" them chugging along on
the headphones. There is a low volume high pitch periodic (2/s) noise
emanating from the speakers. As soon as I turn prime95 off, it ceases.
The volume setting has no effect on it. 

Has anyone else had this problem? I'm pretty sure its a faulty sound-card,
just wondering if anyone had an idea on how to fix it.

Thanks in advance.

Greg Czajkowski
College of Engineering
Computer Engineering BS 1999
University of Illinois at Champaign/Urbana




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