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Cold room unhappy Mac
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Forum Regular
Join Date: Oct 2000
Location: Piacenza (italy)
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Ok... Dual rev.A G5 2GHz with 2GB BTO RAM.
Installed VPC7. When launched the system had a serious KP.
After a reboot (resetting the PRAM) again VPC7 froze the entire system. Searching internet I found that VPC7 is affected by a serious bug related to systems with more than 2GB. >!? Probably >= 2GB...
Ok, I'll wait the f*§?^|g microshit for a patch.
Rebooted again and booted from techtool pro CD to check the HD.
While inspecting Volumes the system froze again! Hey wait! I'm booting from a CD! What's going on here? The OS on the CD was stable... Mumble mumble... Idea! The system froze when the system is stressed. Can this be the culprit? Also, in some forum I read a post that says the rev.A (?) doesn't like low temp... so I went to warm up the room from 15°C to 22°C, rebooted from the CD and... all test fine. So I rebooted form the HD and relaunched VPC7... with my surprise the system is now stable again!
To conclude: where I live the temp (the system was stable, see my post: G5 and 10.3.5 a very very stable system) dropped form 20°C to 10°C - 12°C and my stressed system under some temp threshold (my room was at 15°C) froze. Raising the room temp solved the problem. Probably cold air flowing internally condenses on the sensors and the system froze... but it is only an hypothesis.
Sam
(Last edited by samslaves; Oct 15, 2004 at 04:38 AM.
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Professional Poster
Join Date: Mar 2002
Location: Boston
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Wow, I know that heat effects computers, this is the first time i've heard cold (not extreme) has done something.
Mike
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Mac Elite
Join Date: Jun 2003
Location: Alabama
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ya i was figuring u were using this in a tent in the arctics or something. that is very odd. 
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http://www.mafia-designs.com
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Forum Regular
Join Date: Oct 2000
Location: Piacenza (italy)
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The happened one is totally ripetibile. Same steps same KPs. Even varying the tested apps, using cinebench for example, to stress the system, if the temp is low (<15°C) the system froze. Raising the temp solves the problem.
Sam
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Mac Enthusiast
Join Date: Mar 2002
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What are the stated specifications for operating temperature? I can't believe that 15 deg C is too cold.
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Mac Elite
Join Date: Oct 2004
Location: Downtown Austin, TX
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That's strange.
Some PC overclocker enthusiasts run their entire PC in a small refrigerator/freezer. And some others cool their CPUs with liquid nitrogen.
I know that hard disks don't like being cold (condensation can occur internally) but other than that, systems should be able to run ~10-20 degrees C.
My guess is your HD
...or maybe the RAM?
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Admin Emeritus  Join Date: Oct 1999
Location: Zurich, Switzerland
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Generally speaking, computers like the cold -- 15C is decidedly not too cold.
Most likely, it's a connector that's not seated quite right, and thermal expansion is causing the intermittent behavior. I'd reseat all the connectors and see if that helps.
tooki
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