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Problem Overclocking 3800+ x2 Toledo 939

Discussion in 'Hardware' started by Konranjyoutai, 23 Jun 2007.

  1. Konranjyoutai

    Konranjyoutai What's a Dremel?

    27 May 2004
    Likes Received:
    I have been trying to get the most out of this chip for a while now and its getting aggravating.
    Its a 3800 x2 toledo, 2x 1gb corsair pc3200, MSI K8N Neo4 Platinum, eVGA 7800GT OC.

    Running at 2.5GHz ram at 208.33 HT Link at 1000MHz at 3-3-3-6-1T with vcore of 1.45 i can pass any stress test 24hrs without breaking 41oC max temps (i have a zalman9700NT cooler)


    highest overclock, unstable in prime95 - locks up about 15mins after use (vcore at 1.55)


    highest CPU overclock, memory slower for more cpu juice, but still hit barrier. Not stable in prime95 even trying a vcore of 1.6 - locks up after about 10 mins (temps never breaking 52oC)

    Do you think i have hit the limit in the chip?? its stable at 2.7GHz with moderately low temps at max load (48oC) But it seems like the chip can give more with the right settings, but it might just be at its limit?

    I can get the ram a very stable overclock at 1:1 with the CPU FSB to 233, with the ram having an extra .2 volts. at 2.85 and 3-3-3-7-1T

    Using the divider i slow the ram to 166 and up the cpu fsb to even 265 i need to push vcore to 1.58 giving me 2.65ghz at 1.58-1.62V vcore, very stable all day in windows, fails prime 95 test in less than 4 mins (but will pass pcmark05) ???? ram running at a lower 220.08MHz with same 3-3-3-7-1T timings at 2.85V

    to get past 2.75 i need to up the vcore higher to 1.65

    i use various programs to check for temps (to make sure one is not off any)
    bios, everest home edition, msi core center, motherboard monitor

    at the 2.65GHz cpu and 220Mghz ram stable in windows, but not in prime95 my temps run at 32oC idle and 46oC at 100% load for 30 mins.

    System is cool and wont crash, but wont pass prime either... its very monotonous


    same results on prime 95 if HT link is at 1060 or 750
    ram tests fine at these speeds

    any help would be GREATLY appreciated.
  2. Krikkit

    Krikkit All glory to the hypnotoad! Super Moderator

    21 Jan 2003
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    Sounds like it might've reached its limit. Is it a new chip? If it's not had time to burn in yet, try running stress-tests for several days at the stable OC, then try again. :)

    Even if it has reached the max, that's a nice chip, 2.8GHz isn't bad at all. :)

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