Xeons with an open multiplier

Discussion in 'Processors and Motherboards' started by BlackArchon, Aug 5, 2017.

  1. bsmith

    bsmith New Member

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    I have unintentionally got myself into a state where CPU-Z misreported during BCLK overclocking. Of course I did not submit the results... This seemed to me to be a bug in the application, but I no longer trust it completely.
     
    #101
    Last edited: Nov 21, 2018
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  2. wellen1981

    wellen1981 New Member

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    Hi all, just wanted to post with some thoughts, findings, and the odd question...

    My thoughts
    I think a lot of the confusion comes from the fact that even if users grab a Xeon with an unlocked multi, it can sometimes be simply their method of testing that leads them to an incorrect conclusion - an example of this is Intel XTU software - certain versions of XTU do not allow certain unlocked Xeons to show as overclockable.
    Regarding people finding screenshots eg CPU-Z of certain Xeons with what appears to be higher than stock multis, I would say to avoid this thread ending up with lots of incorrect assumptions it would be best if users who have personal experience with each Xeon multi overclocked are used for adding Xeons to this threads first post.
    Eg if someone owns the Xeon and has actually overclocked it past turbo using the multi increase - then it is safe for the chip to be in this threads list.

    My findings
    I have experience with LGA1366 Xeon W3680 and HP Z400 Workstation (Version 2). I can use Intel XTU to increase the multi but there are a few versions of XTU that dont work and give the impression that the CPU is locked - therefore people need to be cautious when testing and make sure they try various different versions of Intel XTU to be sure of their own findings.

    My questions
    I am under the impression that LGA1366 Intel Xeon X5680 and X5690 are locked multiplier but does anyone here have evidence that proves otherwise? Eg has anyone managed to use Intel XTU to increase the multiplier past turbo?

    Thanks all for reading and I was posting about Z400 and W3680 on overclockers in case you wondered.

    Cheers
     
    #102
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  3. Retrorockit

    Retrorockit New Member

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    We've been using Throttlestop to overclock these, so the XTU issue isn't the problem, and all the 2 QPI 5500, and 5600 Xeons are coming up locked. W or X or even ES series.
    In LGA 1366 all the ones coming up unlocked have an unlocked equvalent like the i7-875X, i7-980X,i7-990X etc.
    The only dual CPU LGA1366 overclocks I've seen are on the unlocked EVGA Classified SR2 motherboard.
    The other thing we're finding is that the dual CPU motherboards don't support the unlocked ( or any) single CPU chips even in single CPU configuration. They're 5500/5600 series Xeons only.
     
    #103
  4. Milli

    Milli New Member

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    So if I understand correctly, the W3670 isn't unlocked even though it's the same core?
     
    #104
  5. foureight84

    foureight84 Member

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    Apparently there's OEM haswell 1681 V3, 1686 v3, and 1691 V3. I'm interested to find out if these are unlocked but can't find them anywhere.
     
    #105
  6. BlackArchon

    BlackArchon Member

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    I assume there are quite a few people who want to get one of these CPUs, however I haven't seen them in the real world. I'm not sure if they really exist.
     
    #106
  7. _haru

    _haru Member

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    They do exist, but they are not unlocked.
     
    #107
  8. foureight84

    foureight84 Member

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    Well that ends my quest.
     
    #108
  9. BlackArchon

    BlackArchon Member

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    What's the source of your information?
     
    #109
  10. derviking

    derviking New Member

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    #110
  11. derviking

    derviking New Member

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    the w3565 is locked I know as I have it and have found it locked using evga board also wxeons no ecc memory
     
    #111
  12. BlackArchon

    BlackArchon Member

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    Thank you, I updated the list. :)
     
    #112
  13. RolloZ170

    RolloZ170 Active Member

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    here is the reason why people think the xeon e5-1620v2 is unlocked
    Zwischenablage01.jpg
     
    #113
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  14. Retrorockit

    Retrorockit New Member

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    I have a user at the Throttlestop overclocking thread who wants to overclock his E5-1660V2 Xeon.
    The CPUZ 1660v2 chart seems to have unlocked E5=1620v2 results in it for some reason.
    We're finding lots of Dell T3610 workstation E5-1650v2 overclocks at userbenchmark,com but the 1660 remains a mystery.
    So is the E5-1660v2 confirmed multiplier unlocked.
    and, is there any evidence that Intel is using the Spectre/Meltdown microcode patch to lock these xeons back up?
    The ones at CPUZ are flagged as needing this.
     
    #114
  15. BlackArchon

    BlackArchon Member

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    I don't think so, at least I haven't found anyone mentioning that their overclockable Xeons suddenly stopped being overclockable after installing the latest Windows patches or modding their BIOSes to integrate the new microcodes.
     
    #115
  16. Biomecanoid

    Biomecanoid New Member

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    So i just bought the x5690 for my HP Z400 and according to this thread its not overclockable because it has a locked multiplier right ?
    I guess i made a mistake and should have gotten the w5690 ? :/
     
    #116
  17. BlackArchon

    BlackArchon Member

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    The Xeon X5690 doesn't seem to have an unlocked multiplier, but you can overclock locked Nehalem-based CPUs by changing their reference base clock.
     
    #117
  18. Biomecanoid

    Biomecanoid New Member

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    How can i do that on a HP z400 with windows10 the bios does not provide any settings regarding overclock. Can i do this via software on windows ? XTU and ThrottleStop dont work i tried them
     
    #118
  19. BlackArchon

    BlackArchon Member

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    I don't know which software tools are to be used, since I've never used a Nehalem CPU. However, I think you should better ask in a true overclocking forum. ;)
     
    #119
  20. Biomecanoid

    Biomecanoid New Member

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    OK thank you ;)
     
    #120
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