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System Temp

Started by Smugs, February 24, 2007, 18:42:45 PM

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Smugs

Quote from: SeriousSmugs, I hope you enjoyed the blonde moment with the fan direction :)

Not following you?,sorry its been one of those day lol.
TekForums member since 14th August 2002

Mongoose

Quote from: SeriousSmugs, I hope you enjoyed the blonde moment with the fan direction :)

Quote from: Mongoose
Quote from: Serious
Quote from: Mongooseoverall system air temp cant be higher than CPU temp (Thermodynamics, heat doesnt flow from cold to hot) so either the system temp sensor is in a hotspot or something somewhere isnt working right.

A liquid nitrogen cooled CPU certainly can be colder than the system temp sensor, although thats being a little bit OTT for normal usage.

A heat pump moves heat from cold to hot otherwise freezers and refrigerators wouldnt work. OK, I might be being a little picky on that one.

OK I should have said heat doesnt transfer on its own from cold to hot. Hes using standard air cooling, so I didnt feel it was necessary.

As I said, I was being picky ;)

I know, I would expect nothing less from you mate ;) tbh as I typed it a little voice in the back of my mind was listing the ways in which what I was saying was strictly speaking wrong and going "noooo Serious will pick us up on it!!". One day Ill learn to listen to that little voice.

Mongoose

smugs have you got say a medical thermometer, or a fish tank one or something that you could sit inside your case for a while and get a second opinion on the air temp in there?

Alternatively try having the side off and blowing room temp air in with a fan, the system temp should then drop to room temperature.

It really does sound as if its reading backwards, 26 system 34 CPU would be a much more normal fairly good aircooled reading.

Serious

Quote from: Smugs
Quote from: SeriousSmugs, I hope you enjoyed the blonde moment with the fan direction :)

Not following you?,sorry its been one of those day lol.

It sounded like you were saying the way the PSU was installed (fan up or down) affected whether it blew air into the system or sucked it out. Obviously, unless they put the fan in the wrong way around, its going to suck air out no matter which way up the PSU is in the case.

Smugs

Quote from: Serious
Quote from: Smugs
Quote from: SeriousSmugs, I hope you enjoyed the blonde moment with the fan direction :)

Not following you?,sorry its been one of those day lol.

It sounded like you were saying the way the PSU was installed (fan up or down) affected whether it blew air into the system or sucked it out. Obviously, unless they put the fan in the wrong way around, its going to suck air out no matter which way up the PSU is in the case.

lol damn see told you it was one of those days.
TekForums member since 14th August 2002

Smugs

I found my self a fridge thermometer (not ideal but the best I could find) and sat it on top of the floppy drive just above half way up in my system and out of the way of direct airflows so to get the most accurate reading.

I left it for about 15 minutes and it recorded a temperature of about 21c

But you can tell even with the out the thermometer that it doesnââ,¬â,,¢t feel like 35c in side the case.
TekForums member since 14th August 2002

Mongoose

if the air temp in there is 21 then its possible that the CPU really is 26, though that would be one hell of a HSF.

But I still think the most likely possibility is that the readouts are the wrong way round.

How about loading up the CPU and seeing which number moves first (should be CPU)?

Smugs

Its not a very good thermometer and is designed to read fridge temperatures so id imagine the temp to be a few degrees higher but not in the 35c range Iââ,¬â,,¢m being told by the BIOS or Speedfan.

Using Stress Prime 2004 the first temp to move up is the CPU read out on speed fan, another thing ill add is that using a separate little programme called Core Temp its reads the core as 23-25c.

HSF is a Freezer64 Pro huge thing with a 90mm fan.


 :?

Few things of note my room isnt very warm the system is pretty tidy with lots of room around things like the HSF, RAM and GFX card.

Still that may explain the low CPU temp but not the high system temp?
TekForums member since 14th August 2002

Smugs

A friend of mine thinks it could be reading from the Northbridge and not the Ambient air temperature as thought?

[EDIT] Scratch that some people on the MSI forums dont think it is.
TekForums member since 14th August 2002

Mongoose

sounds like your CPU really is at ~26 then which is a call for celebration by any standards, my chips dont often run that cool and Im watercooled.

My guess is that wherever the system temp sensor is must be a hot spot, perhaps it is close to the NB or GFX card, or maybe hiden in between some expansion cards where the airflow is a bit pants.

I wouldnt worry too much about it, its not like either is anything close to a danger area for any component in your PC.

Smugs

True its never gone over 38c (system) and thatââ,¬â,,¢s after 3 hours of BF2 and from the tests Iââ,¬â,,¢ve done its not the real ambient temp of the case so I should think its in a hot spot like you said.
TekForums member since 14th August 2002

Serious

bit late asking now but which cpu have you got?

If its a dual core 6300 with a really big heatsink on then it just might be telling the truth :/ System temp might be getting affected by a heatpipe cooled Northbridge chip. (Please note Im probably out of it and grasping for straws here ;) )

Smugs

CPU is a single core Athlon 64 3800+

The Northbridge does have a heat pipe on with a small fan on the NB heatsink.

TekForums member since 14th August 2002