27'' iMac ATI HD 4850 Mobility?

Discussion in 'iMac' started by soomld, Nov 1, 2009.

  1. soomld macrumors newbie

    Joined:
    Nov 1, 2009
    #1
    Hey, just a quick question

    I just ordered a i7 iMac (my first mac :D) yesterday and I'm excited for it. But I been hearing rumors that the ATI hd 4850 is the mobility version? It wasn't stated in website, I will be terribly disappointed if it is.

    Can anyone confirm this?
     
  2. Hellhammer Moderator

    Hellhammer

    Staff Member

    Joined:
    Dec 10, 2008
    Location:
    Finland
  3. Relis macrumors newbie

    Joined:
    Apr 2, 2008
    #3
    The machines with the 4850's havent even shipped yet how would you know
     
  4. Hellhammer Moderator

    Hellhammer

    Staff Member

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #4
    From iFixit's teardown. There is simply no space for desktop GPU
     
  5. zedsdead macrumors 68040

    Joined:
    Jun 20, 2007
    #5
    I agree. It's amazing they were able to fit a desktop quad in there.
     
  6. Hellhammer Moderator

    Hellhammer

    Staff Member

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #6
    Yup, especially one with TDP of 95W. Desktop ATI 4850 has even bigger TDP so no way that would be possible with making iMac thicker and developing the cooling system
     
  7. Relis macrumors newbie

    Joined:
    Apr 2, 2008
    #7
    Shame tbh, wouldve been awesome

    Anybody know how much it matters roughly? (performance desktop vs laptop gpu of the same card)
     
  8. nicroma macrumors 6502a

    nicroma

    Joined:
    Jun 20, 2009
    Location:
    Midwest, USA
    #8
    With an i7 fitting OK and the fact no one has seen the new 4850 I think we'll just have to wait and see.
     
  9. filmgirl macrumors regular

    filmgirl

    Joined:
    May 16, 2007
    Location:
    Seattle, WA
    #9
  10. flopticalcube macrumors G4

    flopticalcube

    Joined:
    Sep 7, 2006
    Location:
    In the velcro closure of America's Hat
    #10
  11. Hellhammer Moderator

    Hellhammer

    Staff Member

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #11
    It's equal for desktop 4830 which ain't a bad card
     
  12. sfroom macrumors regular

    Joined:
    Apr 30, 2008
    #12
    The original 24" iMac had an option to upgrade to a 7600 GT, which, while it used an MXM mobile chip socket, was actually the desktop chip, if I recall correctly.

    The 4850 in the iMac most likely uses a custom daughtercard, but I wouldn't rule out that it could be the desktop chip quite yet. Was the 4850 in the previous generation a mobile variant? I believe they may be changing the graphics configuration, because as far as I can tell, it's the 4850 which is delaying shipping on the high end systems, not Core i5/i7.
     
  13. sfroom macrumors regular

    Joined:
    Apr 30, 2008
  14. Badger^2 macrumors 68000

    Badger^2

    Joined:
    Oct 29, 2009
    Location:
    Sacramento
    #14
    why would you be terribly disappointed?

    What are you planning on doing with your new iMac that will exceed the capabilities of the 4850?

    Gaming?

    Here is a review of the previous iMac with a 4850 and a Core 2 Duo:

    >> FINALLY A SERIOUS GPU FOR iMACs
    Remember when the iMac was laughable as a game platform? Nobody is laughing now. The 'early 2009' iMac 3.06 with the optional Radeon HD 4850 is impressive as a gaming platform. The only Mac that runs games faster is a Mac Pro with the Radeon HD 4870.

    http://www.barefeats.com/imac09.html

    I can hardly wait until they run this series of tests with a new i5 or i7 w/4850.

    http://www.barefeats.com/imac09b.html
     
  15. Hellhammer Moderator

    Hellhammer

    Staff Member

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #15
    Mobile 4850 is just underclocked desktop 4850 and 4850 used in iMac can be a new variant, something between mobile and desktop.

    ATI 4850 used in early '09 iMacs is mobile, so I will be surprised if it's desktop version in late '09 models.
     
  16. sgnhh macrumors newbie

    Joined:
    Nov 2, 2009
    #16
    I've been reading these forums for about a month and a half without feeling the need to create an account and post, but I think this post broke me. Those gaming benchmarks are terrible. I realize that they are only benchmarking games that were released on OSX, but you have to consider the age of those games. They're benchmarking current hardware on nearly generation-old games.

    I think what we really need to see are some Bootcamp benchmarks of recent games, like Left 4 Dead/2, STALKER Clear Sky, Far Cry 2... geeze, maybe even Crysis or Crysis Warhead, although the results may be comical at native res (Crysis should at least run stable on Medium settings). In any case, games that they currently benchmark PC systems on.

    If you're unhappy with the graphics card, I'd suggest just building yourself a small gaming PC. For between $500 and $600 you can get a triple- or quad-core processor, a new DX11 graphics card, RAM and a HDD. Once they get the mini-DP in figured out on the new iMac, I'm probably going to put an HD 5850 card in my old system and use that to run games to the iMac. Just a thought.
     
  17. Badger^2 macrumors 68000

    Badger^2

    Joined:
    Oct 29, 2009
    Location:
    Sacramento
    #17
    well, you probably should have not bothered with a post?

    Heres the problem with building a small gaming PC: it runs Windblows

    Secondly, this post had nothing to do with gaming.

    If you want to spout off about how you can build a great gaming PC, I would suggest something like the pcnoobgamersgalore.com forum...
     
  18. sgnhh macrumors newbie

    Joined:
    Nov 2, 2009
    #18
    I wasn't responding to the OP, I was responding directly to your post in which you mention gaming. Hence the quote.

    Get your Windows hatred under control.
     
  19. peakchua macrumors regular

    Joined:
    Apr 12, 2010
    #19
    5750 Mobility?

    Referring to THEO VALICHs article on the 5750, would the 5750 if apple included mobility, be faster than the 4850 mobility?
     
  20. Rodus macrumors 6502a

    Rodus

    Joined:
    Oct 25, 2008
    Location:
    Midlands, UK
    #20
    A little bit, the speed difference is hardly earth shattering though.
     
  21. peakchua macrumors regular

    Joined:
    Apr 12, 2010
    #21
    really?

    the mobility 5750 is slower than the 4850, only the 5870 mobility can beat the 4850......... this is sad. Im still wondering about more gpu options in the next imac........ 330m in entry level or 320m, then maybe a mobilitty 4000 series and then for quad core model........ a 5870m?:confused:
     
  22. Hellhammer Moderator

    Hellhammer

    Staff Member

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #22
    Yeah, only 4870 or 5870 would be faster than current 4850 is. http://forums.macrumors.com/showthread.php?t=875286

    I'm guessing ATI 54xx in low-end 21.5" as it's dedicated and integrated can't be used with iX CPUs. Then ATI 56xx in high-end 21.5" and low-end 27" and finally ATI 58xx in high-end 27"
     
  23. TMRaven macrumors 68020

    TMRaven

    Joined:
    Nov 5, 2009
    #23
    That old article hinted at the desktop variant of the 5750 in the iMacs, and not the mobile variant, due to their mentioning of the amount of shading processors. The desktop 5750 would indeed outperform mobile 4850-- it has around 15 gbps more memory bandwidth, larger memory buffer and overall more processing power-- at the expense for 15 more tdp. I'm not sure how it relates to the mobility 4850 on size though.
     
  24. Hellhammer Moderator

    Hellhammer

    Staff Member

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #24
    Desktop 5750 is 20-40W hotter and iMac is already having heat issues... Really doubt it's going to be used due heat.
     
  25. TMRaven macrumors 68020

    TMRaven

    Joined:
    Nov 5, 2009
    #25
    Nah the 27" iMac is one of the cooler computer's I've ever used.

    First, I'm a firm believe in engineering from apple, so there's no doubt they found a way to further the 27" iMac's cooling.

    Also, like I said the cooling of the 27" is very good. The hdd almost never goes above 50c, the cpu only gets over 50c if you're doing lots of video playback and video encoding, if the cpu gets to 70c, fans will kick in, and even the smallest increase in fan speed brings cpu back down to around 50-60c.

    The gpu gets up to 85c while gaming, but never above that. What's even better is the fact that apple doesn't even put a fan on the gpu heatsink itself, and even if the user increases the optical drive fan by the slightest amount, the gpu never goes above 60c. So I'm a firm believe the iMac would feature a 15-20 tdp hotter gpu.
     

Share This Page