Why so little overclocking?

Discussion in 'Mac Pro' started by Loa, Jan 22, 2010.

  1. Loa macrumors 65816

    Loa

    Joined:
    May 5, 2003
    Location:
    Québec
    #1
    Hello,

    It seems that everytime I visit a tech site like anandtech and stumble on CPU articles or discussions, they talk about overclocking. On the latest i3 CPU, the author overclocked the 2.93GHz to a stable 4GHz wihtout even needing additional cooling.

    Why is overclocking such a big deal on the PC side, but not on the Mac side even though we're using the same family of chips?

    Thanks

    Loa
     
  2. Eidorian macrumors Penryn

    Eidorian

    Joined:
    Mar 23, 2005
    Location:
    Indianapolis
    #2
    Apple's control over its EFI firmware puts a damper on having fun with BLCK speeds and memory timings.
     
  3. aliot macrumors member

    Joined:
    Jun 19, 2008
  4. Cindori macrumors 68040

    Cindori

    Joined:
    Jan 17, 2008
    Location:
    Sweden
    #4
    For what? Well of course more performance.


    but as Eidorian said, we don't have BIOS, so no easy overclocking.

    Overclocking the octo 2.26 GHz to 2.93 GHz would save you $ 2,600, and I'm pretty sure the Xeons would handle it well.
     
  5. alphaod macrumors Core

    alphaod

    Joined:
    Feb 9, 2008
    Location:
    NYC
    #5
    Stability is also more important than sheer performance; at least that's how we're suppose to see it; Macs are for serious folks. :p
     
  6. Ca$hflow macrumors 6502

    Ca$hflow

    Joined:
    Jan 7, 2010
    Location:
    London, ON
    #6
    I think they should allow macs to be over clocked. They should do it in a way that if someone does then the warrantee is null and void.
     
  7. Gomff macrumors 6502a

    Joined:
    Sep 17, 2009
    #7
    I can't ever see Apple sanctioning overclocking their machines and potentially allowing the user to damage or at least make them less stable.....They'd be too worried about the harm to their reputation.

    Overclocking is one of those things that highlights the cultural difference between PC and Mac ownership.
     
  8. 300D macrumors 65816

    300D

    Joined:
    May 2, 2009
    Location:
    Tulsa
    #9
    Spend $4,000 on a machine and then tell us about how fast you got the CPU's and how much they cost to replace with a void warranty.
     
  9. Eidorian macrumors Penryn

    Eidorian

    Joined:
    Mar 23, 2005
    Location:
    Indianapolis
    #10
    Some people do that...

    I'm more fond of $100-200 processors on air though.
     
  10. aliot macrumors member

    Joined:
    Jun 19, 2008
    #11
    Are you serious?How much you can got form 2.26 to 2.93?Don't forget you can't change a bigger fan or liquid cooling in a mac pro,at least not on a easy way.
    If you using a E5200 OC will help, because it worth a try and E5200 really just a eco choice.On a powerful dual xeon system...maybe not so much.
     
  11. dukebound85 macrumors P6

    dukebound85

    Joined:
    Jul 17, 2005
    Location:
    5045 feet above sea level
    #12
    I have oc'd a q6600 from 2.4 to 3ghz with no issues and not changing any voltages or components
     
  12. Gomff macrumors 6502a

    Joined:
    Sep 17, 2009
    #13
    Hmmm. Not sure if this is the same thing as "real" overclocking PC style, or a good idea :eek:

    Nudging the slider up just a fraction basically causes an instant Kernel Panic on my 2008, 2.8 Ghz Octo.

    Note to self: My machine is plenty fast enough, even for 3D rendering that uses all 8 cores.
     
  13. Loa thread starter macrumors 65816

    Loa

    Joined:
    May 5, 2003
    Location:
    Québec
    #14
    Hahaha,

    Thanks for the EFI-BIOS replies!

    For the rest... funny replies! Sounds like GM employees defending their company's bad decisions.

    Judging from *most* of the replies, we don't have OC on Macs because most ppl are:

    -afraid
    -prejudiced
    -using knowledge that is decades old

    Read up on what's possible on simple i3 chips today. Going from 2.93 to 4. Without using extra cooling. With stability.

    If i3 chips can do that, what can the workstation grade CPUs in our MPs do?

    I'm aghast at the tone of most replies!

    Loa
     
  14. Transporteur macrumors 68030

    Joined:
    Nov 30, 2008
    Location:
    UK
    #15
    Yes, but for how long?
    Please read up on electromigration!

    A MacPro is a workstation (or at least tries to be one :D). That requires stability in all points for a long time.
    In fact overclocking with that high rates WITHOUT proper cooling can destroy your CPU in just a couple of month.
    I once pushed it to high myself. 3.2 to 4.4GHz. Even with a decent watercooling (core temps never higher than about 50° C), the CPU died after only three month. It started with not reaching the clock speed of 4.4, and finished with not even reaching 2GHz.
    That's definitely not what you want in a 3000$ machine that, in case of the most companies, has to last at least 3 years.

    Moderate overclocking is no big deal but I don't think Apple will ever make this possible.
     
  15. Umbongo macrumors 601

    Umbongo

    Joined:
    Sep 14, 2006
    Location:
    England
    #16
    No Intel partner offers Nehalem based Intel Xeon workstations with overclocking capability. No dual socket board supports processor clock speed overclocking. It isn't Apple's decision. You can overclock Xeons and get similar gains to the Core i7s using an X58 board so we could have 4GHz Mac Pros, Intel just choose to not allow it at a commercial level.
     
  16. lemonade-maker macrumors 6502

    lemonade-maker

    Joined:
    Jun 20, 2009
    #17
    Overclocking gives marginal gains compared to potential failure. It really is not req'd on a mac. There other methods of improvement that will give real world benifits and won't compromise longevity (raid0, ssd, memory). If you make a living on the machine and it's too slow, buy a faster machine. If you bought a mac to OC, you made a mistake.
     
  17. TennisandMusic

    Joined:
    Aug 26, 2008
    #18
    Man you have no idea what you're talking about. You can EASILY overclock i7 920's with no worry about "potential failure" or "marginal gains." You can take the 2.66ghz cpu up to 4 ghz on air! Come on now, please don't make things up just to try and assuage the Apple fans. I'm not saying the Mac Pros need overclocking per se, but that is just not cool.
     
  18. Eidorian macrumors Penryn

    Eidorian

    Joined:
    Mar 23, 2005
    Location:
    Indianapolis
    #19
    3.2 GHz on stock voltages is pretty tame stuff.
     
  19. sushi Moderator emeritus

    sushi

    Joined:
    Jul 19, 2002
    Location:
    キャンプスワ&#
    #20
    One reason is that Apple wants to ensure stability of their systems.

    OC'ing doesn't always create a stable system environment.
     
  20. Transporteur macrumors 68030

    Joined:
    Nov 30, 2008
    Location:
    UK
    #21
    Seems as if we've got another candidate that hasn't done his homework...

    Again, read up on electromigration! If you haven't heard about it in the context of overclocking, well, sorry to say but 'you have no idea what you're talking about'.
    2.66 to 4 is just pathetic with air.
     
  21. hwhalers macrumors regular

    Joined:
    Nov 23, 2009
    #22
    Why would I threaten my warranty within the first three years? It's just not worth it. I need my computer to work correctly a lot more than I need it to work a little bit faster. After the AppleCare period I might consider it, if it wasn't better to sell it and buy a newer one.

    I don't care about getting 3 or 4 more FPS in whatever the newest game is on a computer that'll break or get replaced within the year, so I don't bother overclocking.

    And don't reply that I don't know anything about overclocking. I'm aware of the excess speeds that can be attained on air these days, and I'm aware that my low-binned Xeons are probably capable of faster than they're certified at. I don't actually care.
     
  22. lemonade-maker macrumors 6502

    lemonade-maker

    Joined:
    Jun 20, 2009
    #23
    You may be right but you are not. If you bought a mac to overclock it, you are the person who is missing out on knowledge. Buy pc and burn it up, have fun with that. Put mac os on it, if you are capable.
     
  23. pprior macrumors 65816

    Joined:
    Aug 1, 2007
    #24
    Part of the reason I bought a mac is to get AWAY from all the nonsense with overclocking.

    Personally I find it tiring to hear everyone droning on and on about cooling techniques and tweaks to keep their machines from crashing.

    I value stability above all. that's a big reason I switched to mac. I have 0% interest in overclocking and could care less.
     
  24. Dr.Pants macrumors 65816

    Dr.Pants

    Joined:
    Jan 8, 2009
    #25
    :D That it is. If I wasn't a student, I swear... :eek:

    Read about it on Wikipedia and have a good idea of what it does and how it works; do you have any more information specific to the matter? Something you've read, pertaining to overclocking?
     

Share This Page