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difference in temps on each core

Discussion in 'Overclocking & Cooling' started by mcgriffo, 16 Apr 2008.

  1. mcgriffo


    Joined: 5 Dec 2006

    Posts: 374

    out of interest - is it normal, and why does it show it like this, to have a 5 degree difference in temps between core 0 and core 1 (on a dual core)?

    eg core 0 = 19c
    core 1 = 24c

  2. shadowake


    Joined: 8 Aug 2007

    Posts: 823

    Location: North West

    Not sure on a dual but on my quad the cores vary by up to 5deg. If your really bothered you could do some laping.
  3. Junk


    Joined: 13 Feb 2006

    Posts: 424

    Location: UK

    Its the concave IHS that intel insist on using, Lapping the CPU fixes it - but may damage resale value.
  4. IAmATeaf


    Joined: 3 Apr 2007

    Posts: 7,158

    Location: South of the Watford Gap!

    The cores on my quad vary by around 3 C but which core(s) are cooler/hotter seems to vary everytime I check. I have lapped both the CPU and HSF though.
  5. slowrunner


    Joined: 4 Dec 2007

    Posts: 708

    Location: hull, East Yorkshire

    Mine are normally within 1deg of each other, but I have noticed that 1 of the cores shows more load than the other quite often.
  6. gjc10212

    Wise Guy

    Joined: 20 Oct 2005

    Posts: 1,226

    Location: London

    3c difference between my cores. Generall 0 & 1 are hotter than 2 & 3.

    Lapping my CPU reduce the diff by a couple of C. Lapped my old Ultima 90i and that was 4c ish out. The new Noctua (not lapped) is better for contact...
  7. Cob


    Joined: 30 Jul 2006

    Posts: 18,191

    Location: Antrim town

    5c is nothing tbh.
  8. psycodelicmonti


    Joined: 7 Feb 2008

    Posts: 25

    I have a 5c difference in my cores, pretty much whether the cpu is under load or not.

    Current idle temps are 32c 31c 27c 30c

    Apparently this is normal!
  9. manic111


    Joined: 1 Jul 2007

    Posts: 16,749

    Location: Various

    Mine are 3-4 degrees apart. Idling at 33, 36/7
  10. thegoonden

    Wise Guy

    Joined: 21 May 2007

    Posts: 1,464

    Remember that only measures taken when all cores are in use are valid, if running a single process thread, one core's always gonna warm up a bit more.