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Temp readings - what's safe?

Post Date: 2008-04-03

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Mifunego View Drop Down
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  Quote Mifunego Quote  Post ReplyReply bullet Topic: Temp readings - what's safe?
    Posted: 03 Apr 2008 at 2:07pm

Hey all,

My recent acquisition and use of "PC Wizard 2008" (thanks to someone here) has got me wondering: with all those temps that it can measure, (cores, mainboard, "ACPI thermal zone", etc.) what should I be looking for?  I did some research but was unable to find any kind of temperature range for safe/efficient operation.  Does anyone know of some reference/guide to measure safety or relative performance based on temps?  If nothing else, I can at least satisfy my curiosity.
 
I was never really concerned all that much with temp, until I started reading here that there are some concerns with the 750si case.  Now I'm irrevocably obsessed. 
 
In a related story, UPS says my rig will arrive tomorrow. Clap
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EdH63 View Drop Down
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  Quote EdH63 Quote  Post ReplyReply bullet Posted: 03 Apr 2008 at 3:44pm
Not knowing what you're specific build is makes it a bit hard to give you specific answers, but I can show you what my temps are and that they are within the threshold parameters for what I have.


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  Quote EdH63 Quote  Post ReplyReply bullet Posted: 03 Apr 2008 at 3:44pm

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  Quote Mifunego Quote  Post ReplyReply bullet Posted: 03 Apr 2008 at 6:17pm
Originally posted by EdH63

Not knowing what you're specific build is makes it a bit hard to give you specific answers, but I can show you what my temps are and that they are within the threshold parameters for what I have.


 
 
Thanks.  I guess I should put it another way: where can I find the threshold parameters for what I have, regardless of what I have?  I.e., how do I determine the threshold parameters for a x-core at x-Mhz on a x-motherboard, with a x GPU and x-amount of RAM operating at X-MHz, etc.?  You know the threshold parameters based on what you have.  How did you calculate or determine that?  I guess I'm looking for some tables or formulas that I can apply various components to.  Or will a E8400 CPU (for example) always have the same threshold parameters?
 
Does that make any more sense?
 
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skyR View Drop Down
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  Quote skyR Quote  Post ReplyReply bullet Posted: 03 Apr 2008 at 6:37pm
All Intel's CPUs threshold is 100C.

And it's impossible to come up with a table of the perfect temps because there are a billion possible setups, vcores, speeds, ambient temps, airflow, etc.


Edited by skyR - 03 Apr 2008 at 6:41pm
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Tyler Lowe View Drop Down
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  Quote Tyler Lowe Quote  Post ReplyReply bullet Posted: 04 Apr 2008 at 12:47am
Mifunego, I am pretty intimately acquainted with the 750i and it's strengths and short comings. After you receive your system, if you have questions about your operating temperatures, feel free to post them along with your system specifications and I will be happy to look them over and answer any questions you have, if I am able.
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  Quote Mifunego Quote  Post ReplyReply bullet Posted: 04 Apr 2008 at 1:10am
Originally posted by skyR

All Intel's CPUs threshold is 100C.

And it's impossible to come up with a table of the perfect temps because there are a billion possible setups, vcores, speeds, ambient temps, airflow, etc.
 
So then you're saying there's a formula.  Or formulae, whatever.  I guess I'm not being too clear, but I'll try again:  How does one determine optimum temp ranges for any one setup?  
 
See, if I outline a particular set up, and someone somewhere (as Ed did above) determines this optimum range, then they did some calculations, right?  Clearly.  Ok, then, considering the "billions" of possible set ups, how can anyone ever determine any of these "perfect temps?"  I can see how figuring it might be complicated, but the concept itself really isn't.
 
Then, knowing how to calculate these ranges, or knowing what some unsafe temps are, any interested user can monitor the temps on various components in his/her computer and understand when performance or safety is being compromised due to excessive temperature.  At that point, said user can then make the appropriate adjustments or mods to reduce or eliminate the heat, and therefore, the compromises!  Dig? 
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  Quote EdH63 Quote  Post ReplyReply bullet Posted: 04 Apr 2008 at 2:06am
Originally posted by Mifunego

Originally posted by skyR

All Intel's CPUs threshold is 100C.

And it's impossible to come up with a table of the perfect temps because there are a billion possible setups, vcores, speeds, ambient temps, airflow, etc.
 
So then you're saying there's a formula.  Or formulae, whatever.  I guess I'm not being too clear, but I'll try again:  How does one determine optimum temp ranges for any one setup?  
 
See, if I outline a particular set up, and someone somewhere (as Ed did above) determines this optimum range, then they did some calculations, right?  Clearly.  Ok, then, considering the "billions" of possible set ups, how can anyone ever determine any of these "perfect temps?"  I can see how figuring it might be complicated, but the concept itself really isn't.
 
Then, knowing how to calculate these ranges, or knowing what some unsafe temps are, any interested user can monitor the temps on various components in his/her computer and understand when performance or safety is being compromised due to excessive temperature.  At that point, said user can then make the appropriate adjustments or mods to reduce or eliminate the heat, and therefore, the compromises!  Dig? 


I let DS figure out the best OC and tweaks for my system and I've learned through the boards here what my limits are on the set-up that I have.  Now, with that in mind, the rest of the equation of how much cooler can I get my rig to operate at is in my lap.

When I first got this rig core temps were idling around 45C to 47C and my GPU temp was idle at around 70C.  All of this because I have my rig set precariously under my built-in wall desk in my office where airflow is at a minimal.  I've played with my rig by takig it out from its location and putting it in the middle of the room and letting it run there just to see where the temps would fall, and they came down by a couple of degrees of course.

I opened the french doors to the courtyard off my office and let the cold winter air  fill the room and the temps plummeted to the ground nicely.  After all the moving around and opening doors to see how much flux in temps I'd get, I naturally had to put it back where I was going to be using it everyday and out of the way, back under the desk.  Here's what I've done...

I bought a small floor fan that tucks under my desk comfortably too circulate and push the air from underneath, and I removed the plastic window off my side panel to get more heat out quicker.  By doing this, I've stabilized my core temps around 38C to 43C, and I've dropped the GPU temp down around 63C to 65C.  Some considerable reductions that will no doubt help the longevity of the hardware to some degrees. 

Whatever the achieved marks are that will generate heat from the OCs and tweaks, you can still drive those temps down just by improving airflow around and within that box.  It's amazing how responsive the cores and GPU are to just a little improved airflow.

Anyway, this may not have helped bring anymore light to your situation and could have very well proven to be one noobs ramblings.
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  Quote Mifunego Quote  Post ReplyReply bullet Posted: 04 Apr 2008 at 7:53am
Good info Ed.  Thanks.  I've heard (anecdotally) that Wolfdale series generally runs a lot cooler, and can be OC'd pretty high with stability (I've seen 4.05 GHz) on air cooling.  That's encouraging, considering that's what is in my incoming DSO product.  I'll still keep looking for optimum temp ranges for my particular setups.  I expect to see the new rig when I get home about 7pm tonight.  In-depth review to follow. Geek

Edited by Mifunego - 04 Apr 2008 at 7:55am
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