2011 iMac Graphics Card Upgrade

Discussion in 'iMac' started by MichaelDT, Jun 14, 2013.

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  1. zerozoneice macrumors regular

    Jun 26, 2013
    @isayusay so the only chance is to get a cpu upgrade as well :) there must be a site somewhere far east selling those....
  2. gotofbi macrumors newbie

    Nov 28, 2011
    Great work!!

    Are you sure that you used UEFI supported firmware of GTX 680MX?

    I am surprised that you actually lost initial boot screen.

    Would you mind if you post your 680MX Bios here so I can do some research?

    I am aiming same upgrade but just with 660M.

    I already have 660M bios with UEFI but throughout my research, you should have initial boot screen if you have UEFI BIOS.

  3. rtabor44 macrumors newbie

    Sep 9, 2013
    Any update on this i am very curious. Any one know of any other capable imac models doing this?
  4. qklovehs macrumors newbie

    Sep 13, 2013
    hello, thank you for your posting and I just curious about the graphics card replacement, I want it so bad,
    so here are some questions
    if you replace the gtx680m will the power supply enough for it?
    and again after the replacement, what should we do to lead the imac into MAC os X? (should we flash, how to deal with the uefi thing, and have fixed the 2nd display problem? does it use exactly like the native mac?)
    thank you and really hope your response!!
  5. TofuTodd macrumors newbie

    Oct 3, 2013
    I have ordered an Apple 6770M to upgrade my 6750M. It will be here Monday! The 6770M is just a 20% bump, but I didn't want to drop $500 on a Dell 680M or $300 on a Dell 675M if it may not work! A Dell 670M can be had for under $200 and performs similar to the 6790M. But Apple only shipped 675MX models in iMacs so I fear it could be unsupported, either driver wise or EFI wise. 6970Ms go for around $300. But, I'm game to test it, anyone want to split the risk with me? I'll try it, and if it works mail it on to you for the other half. If it doesn't, we both lose, or flip it on eBay. I'll have my 6750M for sale shortly, as well as the socket 1155 Core i5 2400S 2.5ghz/3.3ghz CPU as I am upgrading that to an ivy bridge i7 :) but the 2010 imacs are socket 1156 anyway...

    I'll post my results nexy week.
  6. TofuTodd macrumors newbie

    Oct 3, 2013
    DIY Fusion Drive: Working
    6770M upgrade: Working
    Core i7 3770S: Flop - won't post.

    ATTN you 2010 iMac owners, I now have a Apple OEM 6750M MXM with for sale :D
  7. jezzy macrumors member

    Jan 12, 2012
    Montreal, Quebec
  8. omvs macrumors 6502

    May 15, 2011
    I bought a 680m (N13E-GTX-A2) off ebay, but my iMac won't boot with it installed - and the diagnostic LED's point to the GPU being the issue. I'm guessing it didn't have the UEFI bios installed, so I think I'm stuck, since my iMac is the only machine with an MXM slot.

    Anyone know of a place that would reflash it for a fee? Buying a MXM laptop to reflash is slightly out of my budget... :)
  9. yjchua95 macrumors 604

    Apr 23, 2011
    GVA, KUL, MEL (current), ZQN
  10. PaulKemp macrumors 6502

    Jun 2, 2009
    Thanks for the guide and information! I wasn't even aware this was possible!! Great work! :)
  11. TofuTodd, Oct 31, 2013
    Last edited: Oct 31, 2013

    TofuTodd macrumors newbie

    Oct 3, 2013
    $100 seem fair? Do you have a 2010 iMac?

    Also, the 3770S is for sale too, since i can't boot it. I paid $215 for it. Would ask $200 with the above card.

    I will also be selling my 2011 mac Mini. 2.5ghz Core i5, 8gb DDR3, AMD Radeon 6630M, and 620gb Fusion Drive (500gb stock drive plus 120gb SanDisk Extreme SSD). This is a true fusion drive as enabled by 10.9 and not simply a core storage volume.
  12. yop39 macrumors newbie

    Jun 27, 2009
    cpu upgrade is possible, i upgraded my imac mid-2011 i5 to I7 3.4
  13. nateo200 macrumors 68030


    Feb 4, 2009
    Northern District NY
    I've seen eGPU's function very well and I believe a guy got one to work in OS X with DaVinci Resolve to use dual 680's or something like that. Let me check my bookmarks and history. I've been keeping close tabs on this as I'd love to grab a 580 or maybe even just a 660 to speed up my rMBP's render times....although FCP X unfortunetly does not support dual graphics cards in the manner that would make it worthwhile yet.
  14. yjchua95 macrumors 604

    Apr 23, 2011
    GVA, KUL, MEL (current), ZQN
    Ahh, thank you :) I'm also trying to do this to my retina MBP (1GB of GT 650M just isn't enough sometimes, and I'm considering buying a 2GB GTX680 and concoct up an eGPU).
  15. ajaysthinkin macrumors newbie

    Nov 5, 2013
    Michael plz help with choosing cards

    Hi Michael plz can you provide some more details as to which all cards have uefi support ? thanks a lot for the thread. it gave me a reason to keep my 2011 imac which i love. please do reply


    any success with the 660m ?
  16. penname, Nov 6, 2013
    Last edited: Nov 6, 2013

    penname macrumors newbie

    Nov 6, 2013
    hey guys.
    I'm thinking about upgrading my 27 imac mid 2011 with gtx 770m, 16gb RAM, ssd drive and a new i7 processor.
    I know it would be easier to buy a new one, but... i wanna some engineering.

    I know, that the only problem concerns GPU upgrade. I read this faq http://forums.macrumors.com/showthread.php?t=1440150.

    How do u think is it similar to iMac?
    Can i buy any new mobile video card (something like this http://www.ebay.com/itm/Nvidia-GeFo...123?pt=PCC_Video_TV_Cards&hash=item1e7f13fc73) and just... launch it "out of the box"?
  17. ajaysthinkin macrumors newbie

    Nov 5, 2013
    Michael plz lend some help

    Michael plz lend some help here
  18. penname macrumors newbie

    Nov 6, 2013
    Yes, it would be great if you assist me.
    I understand that upgrading my imac - here, in Russia - would cost me around 1,1k$. Of course it is easier (and cheaper as well) to sell my imac and buy another one. But... i wanna upgrades.)))
  19. Shakior macrumors newbie

    Jul 18, 2013
    Is there any way to fix this "lost boot screen problem"?
  20. penname macrumors newbie

    Nov 6, 2013
    flash your pc-card to mac...
    how - i don't know)
  21. rippiedoos macrumors member

    Nov 9, 2013
    Does anybody know what the GPU max power consumption is the 21" iMac can handle? Because the 6770M is one of the most powerful MXM 3 Type-A cards and almost every other card is is MXM 3 Type-B. The difference is size (Type-B is bigger as shown in the pictures posted earlier in this post) and max power consumption a MXM 3 Type-A can draw. As stated here, Type-A can only draw 55w of power and Type-B can draw up to 100w. Aren't you guys worried that your power supply or the MXM slot or that some other component gets fried with the 75w or 100w of power usage? According to this review, the GTX 660m draws 75w and the 675m and 680m both draw 100w max.

    I'm looking for a better MXM 3 Type-A card in the market for my 21" iMac 2011 and the FirePro M4000 looks like the next best thing to me or something like a GT 650m. The problem however is still that MXM 3 Type-A cards are really rare... So if anybody has any pointers about MXM 3 Type-A cards, I'm really interested because i'm not taking the risk of frying my PSU, motherboard or any other component in my iMac.
  22. ajaysthinkin macrumors newbie

    Nov 5, 2013
    Pls michael need your inputs
  23. goodcore macrumors newbie


    Jun 24, 2013
    Hi! i'm Russian too :) maybe we can cooperate to solve that question about upgrade?
  24. MacVidCards Suspended

    Nov 17, 2008
    Hollywood, CA
    Hey guys, this is a topic that has remained on my mind but I have never done anything with it.

    I have fixed and resold iMacs before but one day I realized that I had taken over my apartment with partially disassembled iMacs. I got rid of them but haven't forgotten.

    UEFI isn't same EFI that Apple has been using. So a PC UEFI card is likely to not give boot screens.

    If there is someone in LA area with an iMac that has replaceable MXM card I would be willing to work on a card.

    More than likely new EEPROM will need to be placed on card.

    NVIDIA EFI can typically be modded to init any other cards in same family.
  25. goodcore macrumors newbie


    Jun 24, 2013
    That be very good if you do this for us!
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