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  1. #1
    Joined
    Jun 2001
    Posts
    18

    Question Weird goings on with CPU fans....any ideas?

    OK here's the deal......brand new AXIA "Y" 1gig Athlon currently running at 1.365gig (KT7 mobo...soon getting IWILL so hopefully crank it up to 1.5).....using the heatsink from a Globalwin FOP38 and a bog standard "noname" fan at 5300 rpms I get idle temp of 32 degs C and peak (using Folding@Home) of 49 degs C. Today I had the cover off my pc and decided to try the FOP38 fan and check my idle/peak temps with that.....to which I get 27 degs C idle and 39 degs C peak "WOW 10 degs drop" thinks I and leaves the FOP38 fan on and puts the case cover back on. Ok so I boot into windows and decide to start up MBM5 which shows an idle temp of 36 degs C "HUH?" thinks I.....starts up folding @home and my peak temp shoots up to 52 degs C.
    Now, I understand that the temps are gonna be higher with the case on than off, but why would they be higher with the FOP38 fan (and heatsink) than just using a shitty 5300rpm fan with the FOP38 Heatsink?
    Anyone have any ideas as to why I'm getting this weirdness?

    Sorry for the long post btw but it's vexed me.

    Oh yeah almost forgot to mention, when changing the fans I didn't remove the heatsink from the CPU.

  2. #2
    Joined
    Apr 2001
    Location
    Down South
    Posts
    1,187
    Just a hunch.....
    But your last remark

    Oh yeah almost forgot to mention, when changing the fans I didn't remove the heatsink from the CPU.
    You may have disturbed the Heatsink/CPU contact area when changing fans. If so then the HSF is not making the same kind of contact it was before, therefore worse thermal transfer.
    This will especially be the case if you used Thermal Interface Material. That stuff is a one shot deal.
    I recommend you remove the HSF, clean the CPU and HSF and reinstall using Arctic Silver or similar.
    Be careful, those Globalwin clips can be a pain.

    Hope this helps.
    Explosive
    ECS KN1, A64 x2 3800 @ 10 x 250
    1Gig Corsair, 7900GT, 80G WD HDD,
    Lite On CDRW, DVD

  3. #3
    Joined
    May 2001
    Location
    Essex (UK)
    Posts
    130

    Hmm

    Sounds a good point to me,

    I used to do that a lot (Im a lazy bugger ) But after a couple of heat increasing instances, Im back to removing the HS as well as the fan. Bear in mind, that fans only move air, not cool it, so if case cooling is inadequate, then warm air will be used to cool the heatsink and thats not good!!!

    Thief
    Mobo: Abit NF7 Rev 2.0 Bios D24
    CPU: Barton 2500+ @ 10 x 222 (2.2 Ghz)
    HSF: SLK800 w 80mm YS-Tech 8125
    RAM: 2 x 512MB Kingmax PC3500 Super Red (single channel ) 11,3,3,2.5
    GFX: Geforce 6800NU @ 16,6 & 345/831
    PSU: Sparkle 400w PSU
    Case: Lian Li PC60 with YS-Tech 8125's

    3dMark05: 4085 so far

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