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Passive cooling my i5

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  • H
    Harvy66
    last edited by Mar 3, 2015, 8:44 PM

    In other forums, you'll sometimes read someone asking why their computer seemingly runs fine, but once they load their video game of choice, the FPS is like 10. Then they'll mention later that the he at sink was not attached correctly and there was a gap between.

    Modern CPUs are quite good at self throttling, although high temps for long periods of time will shorten their life.

    I had a GPU that ran at 108c during the summer and a much cooler 105c during the winter. I used that GPU for 5 years before I got enough money to upgrade it and the case. That fan was LOOOUUUDDDD. I could have hooked up passive water cooling and kept it at a freezing 100c. Replacing the water would have been annoying.

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    • K
      kejianshi
      last edited by Mar 3, 2015, 8:51 PM

      I have an old amd desktop running for my personal pfsense.  It uses 45w I think and the fan is slow and the case fan is slow…

      At first this concerned me, but I have the side pulled off every 6 months or so and no dust accumulates in this thing.

      It just keeps working and the specs are crap.

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      • H
        Harvy66
        last edited by Mar 3, 2015, 9:06 PM

        In my experience, how close to the ground your device is typically dictates how much dust it will acquire. My firewall is about 2' off the floor and it only has a fine almost non-existent layer of dust, while my desktop tower is right next to it, but only 3"-4" off the ground, and it has dust bunnies that require a Holy Hand Grenade to exorcise.

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        • K
          Keljian
          last edited by Mar 3, 2015, 10:04 PM

          Ok so to the naysayers:
          1. I am quoting core temperatures
          2. We are talking a 35w processor which has a max temp of 105C before throttling.
          3. Why would I bother with prime? This chip isn't going to see load like that in its current purpose, it will spike but it won't be continuous heavy load.

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          • K
            kejianshi
            last edited by Mar 3, 2015, 11:21 PM

            Where are you getting your MAX ok operating temperature from?

            You don't have to purposely stress test the system for it to encounter a race condition all on its on.

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            • K
              Keljian
              last edited by Mar 4, 2015, 3:41 AM

              Sorry - 100C

              Coretemp - TJ Max

              Capture.PNG
              Capture.PNG_thumb

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              • K
                kejianshi
                last edited by Mar 4, 2015, 3:54 AM

                I think I trust the intel chip site more…

                40C won't break it but if you are really seeing 60C, I don't think thats great.

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                • C
                  chpalmer
                  last edited by Mar 4, 2015, 4:08 AM

                  Without pics it didn't happen!

                  ;D ;)

                  Triggering snowflakes one by one..
                  Intel(R) Core(TM) i5-4590T CPU @ 2.00GHz on an M400 WG box.

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                  • K
                    Keljian
                    last edited by Mar 4, 2015, 4:15 AM

                    @kejianshi:

                    I think I trust the intel chip site more…

                    40C won't break it but if you are really seeing 60C, I don't think thats great.

                    Urm, it is cooler than with the stock intel cooler…

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                    • K
                      kejianshi
                      last edited by Mar 4, 2015, 5:07 AM

                      Well - So long as you like it and it works.  Thats all that matters.

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                      • P
                        Pylor
                        last edited by Mar 4, 2015, 8:25 AM Mar 4, 2015, 8:21 AM

                        @Keljian:

                        Ok so to the naysayers:
                        1. I am quoting core temperatures
                        2. We are talking a 35w processor which has a max temp of 105C before throttling.
                        3. Why would I bother with prime? This chip isn't going to see load like that in its current purpose, it will spike but it won't be continuous heavy load.

                        35w TDP is low, I agree, but you're talking about 35w in dead air if you have zero fans whatsoever.  The i7 3630qm in my laptop is only a little higher at 45w, but as soon as windows update kicks the cpu usage up to 10% the fan has to kick on to keep it from going over 70C (this thing weighs 10 pounds just from the copper in the heatpipes).  I'm not trying to be a debbie downer, I just think you should be aware of what the temperatures can get up to in that configuration should something happen.  Say a bug is introduced in a package, or you decide to download a new one that looks fun without realizing how much CPU it uses.  Suddenly your CPU usage is spiking and that thing is sitting at 85C regularly and dipping higher.  I'd just tend to error on the side of caution, but I'm also the person with 2 very quiet CPU fans on my heatsink in a push/pull just incase one of them fails (which has happened, bearings don't last forever).  Passive cooling can be neat, I agree, but is there a particular reason you'd prefer no internal fan whatsoever?  Dust sucks, I agree with that, but dust filters are cheap and there are thousands of silent fans out there.

                        In the end, it's your equipment, and I'm just offering an opinion!

                        @kejianshi:

                        I think I trust the intel chip site more…

                        40C won't break it but if you are really seeing 60C, I don't think thats great.

                        Intel site list's TCASE, TCASE is from the IHS and can't be 100% accurately measured after the product leaves the factory.  Using the Tjunction and core temps is the way to go.  OP looks like he's actually running the core temp program which is my personal preference as well.  Are you running pfsense through hyper-v OP?

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                        • M
                          messerchmidt
                          last edited by Mar 5, 2015, 6:44 AM

                          add a casefan if you do not want to add a case and cpu fan. blow it out with compressed air once in awhile

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