AOA Forums AOA Forums AOA Forums Folding For Team 45 AOA Files Home Front Page Become an AOA Subscriber! UserCP Calendar Memberlist FAQ Search Forum Home


Go Back   AOA Forums > Hardware > Cooling & Temperature Monitoring


Reply
 
LinkBack Thread Tools Rate Thread
  #1 (permalink)  
Old 30th August, 2003, 02:38 AM
Staz's Avatar
Member/Contributer
 
Join Date: June 2002
Location: Lafayette LA
Posts: 3,241
Send a message via Yahoo to Staz

Who to trust?

I just put together a system for my grandson. An old KT133A chipset based Iwill KK266 (one of the all time great overclocking boards) paired with an AXIA 1GHz TBird (one of the al time great overclocking cpu's) cooled by an SK6 with a whineing delta fan.

With this system I got a cheap thermometer that has 2 probes and fits in a 3 1/2" drive bay. It only reads in F. I trimmed the probe and placed it so that it touches the edge of the cpu core. I also put a smal dab of artic aluminum for better contact. On the MoBo I bent the thermosister up and put a dab of artic aliminum on it also so it contacts the underside of the cpu.

The thermometer reads 124 under full load and he MoBo reports 109 at full load.

Is there really a 15 degree diference between the chip surface and the underside? Is one of them reading wrong? As long as it's stable I really don't care. I was just bored and wanted to hear others opinions as to weather or not we are really 15 degrees closer to the manufactures max temps than we think we are.

Once again this was a very very cheap thermometer that was bought more for astetic vaue than temp monitoring.
__________________
How come whenever I have a 50/50 chance I'm wrong 80% of the time?

What goes in a computer? Click me to find out.
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
  #2 (permalink)  
Old 30th August, 2003, 08:30 AM
Chief Systems Administrator
 
Join Date: September 2001
Location: Europe
Posts: 13,075

Both probes are probably wrong.

The cheapo one won't have a great accuracy (probably around the 4F or worse mark). The motherboard sensor won't be much better either.

I've found that cheapo thermometers are also affected by things like mains hum and other RF around them. (eg, touching the ground side of the thermometer might make it suddenly read 6-8F lower too)

Net result, who knows which one's accurate. On the other hand, unless you intend to take the CPU up to it's maximum temperature, it's not really a problem!
__________________
Any views, thoughts and opinions are entirely my own. They don't necessarily represent those of my employer (BlackBerry).
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
  #3 (permalink)  
Old 1st September, 2003, 08:23 AM
Kaitain's Avatar
Member
Mars Rover Champion, Joust Champion
 
Join Date: September 2001
Location: MK10, UK.
Posts: 4,372
Send a message via MSN to Kaitain Send a message via Skype™ to Kaitain

Quote:
Originally Posted by Staz
Is there really a 15 degree diference between the chip surface and the underside
Yes. In fact there's probably a little bit more of a temperature difference. The ceramic base on T'Birds wasn't that great a conductor. Better than the modern organic substrate, but still not that great, so you will see quite a sharp temperature drop across it. 15ºC is the normal estimate, so if you're seeing 15ºF then you're doing well...
__________________
It is by coffee alone I set my mind in motion...
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Who can you trust? Daniel ~ Random Nonsense! 1 14th July, 2007 06:05 PM
To trust or not to trust? Staz Betty's Rants and Rages 15 24th January, 2006 02:26 AM
Who can you trust? Áedán Random Nonsense! 15 3rd August, 2002 12:21 AM
Whom Do You Trust? Uncle Bob Mookydooky's Just for laughs! 2 24th July, 2002 05:18 AM
Which one should I trust AmbientFiction Cooling & Temperature Monitoring 12 24th October, 2001 02:23 AM


All times are GMT +1. The time now is 08:22 PM.


Copyright ©2001 - 2010, AOA Forums
Don't Click Here Don't Click Here Either

Search Engine Friendly URLs by vBSEO 3.3.0