From: "Stephan Grupp" <[EMAIL PROTECTED]>
Reply-To: The Great Internet Mersenne Prime Search list <[email protected]>
To: [email protected]
Subject: Re: [Prime] hot CPU!
Date: Thu, 17 Feb 2005 11:38:17 -0500
That's interesting about the Dells. What I have noted (especially in the smaller case Optiplex systems), is that the fan noise is intolerably loud when P95 is running. Crack the clamshell case a bit, and the fan speed and noise drops considerably. I'm not sure that makes things WORSE, as the air path is still through the duct and over the heatsink, whether the case is closed or cracked open.
These high end P4 systems generate a LOT of heat. I wouldnt be surprised if the CPU's go down a little sooner running P95 than they would just grinding idle.
>>> [EMAIL PROTECTED] 02/17/05 1:27 AM >>> Jeff Woods wrote: > At 2/16/2005 11:56 PM, Jud McCranie wrote: > >> Is a 3GHz P4 supposed to be this hot? Is it bad for the machine? > > > Yes, and yes. I have found that without additional CPU case fans, a
> fully-laden CPU (as with Prime95) gets too hot for JUST the power supply > fan to circulate enough air. You need additional case fans... or you > need to run with the case OPEN (side panel off) to allow the hot air
> that the CPU fan is pulling away to dissipate.
Dell P4 systems don't HAVE a internal CPU heatsink fan. they have a large muffin fan on the back panel with a plastic air duct over the LARGE CPU heat sink. On the newer faster P4 systems, the heatsink is often fine vaned copper.
opening the cover would make things WORSE as it would not force the air to flow as engineered. The cases on our Dell desktop "Optiplex" systems at work hinge open and can't be "left off".
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