Going to buy first iMac

Discussion in 'iMac' started by ri0ku, Dec 4, 2011.

  1. ri0ku macrumors 6502a

    Mar 11, 2009
    Hey guys, just wanted a little help with something. I am selling my PC off so that I can purchase the baseline iMac 21.5"

    My current PC specs are :

    Intel Core i7 950 3.06Ghz
    Asus P6X58D-E Intel x58 Socket 1366
    6GB Corsair XMS3 3 X 2GB DDR3 1600MHZ
    Sapphire HD 6870 1GB GDDR5
    Crucial RealSSD C300 64GB
    1TB Samsung HD103SJ SpinPoint F3 SATA-II 3.5" Hard Drive (7200RPM)
    Corsair TX Series 650W PSU

    Could anyone tell me how much of a downgrade I will be doing here? I know the sandybridge processors are fast but is the i5 inside the iMac any better than my current i7?

    I also know I will be seriously taking a hit with the GPU compared to my PC right?
  2. derbothaus macrumors 601


    Jul 17, 2010
    You'll be missing 500MHz on each core and 4 Threads. So roughly twice as slow. The iMac i5 is 4x2.5GHz, you have 8x3.06GHz. So quite the downgrade. The 6870 you have wipes the floor with even the 6970m in the top end 27" iMac. Your Samsung F3 is a bit faster than whatever stock HDD they plop in as well. At least you know it will be a downgrade. On the plus side you are upgrading your OS and apps and if you were not using the full HW potential of your PC you may not miss it.
  3. ri0ku, Dec 4, 2011
    Last edited: Dec 4, 2011

    ri0ku thread starter macrumors 6502a

    Mar 11, 2009
    Thanks for the reply, I didnt think the CPU would be much slower? the mhz/ghz dont really matter to much on todays cpu's by much.
    The GPU is the only thing that concerns me... I like games and I do 3D modelling. I know the downgrade would be pretty bad I guess, but I want a clean work space, free up some space on my desk etc.
  4. jvpython macrumors 6502

    Aug 25, 2011
    New Zealand
    Don't worry about the processor difference. I've seen many i5 vs i7 comparison and the difference isn't huge. It would only matter if you had huge rendering tasks to do as usually the i7 would save you 30 seconds of exporting time on something that normally takes 5 minutes to export. So this wouldn't be the biggest downgrade. For the graphics card, although it would be quite a downgrade the one in the base model iMac is still decent. I say this from fact as my dad has the 2011 base model iMac and it plays cod4, battlefield 2 and assassin creed brotherhood very smoothly and they are all ported version too. Obviously it might not be good enough though if you want to play some of the top latest games through bootcamp but it's still good enough for most game and 3D modeling (I have used Maya 2010 on it). Hope that helps
  5. macmastersam macrumors 6502a

    Sep 14, 2011
    Essex, england
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    I would have said get the 27" iMac with the 3.4ghz quad-core i7 and the 2GB 6970. And as for the RAM swap the one from your old pc onto the iMac and put the iMac RAM inside your old pc (if you plan to sell it) then you won't have so much of a downgrade.
  6. Tombs macrumors regular


    Feb 28, 2010
    Sutton, Surrey England
    If you use the PC for games stay put with what you have otherwise you will be disappointed.
  7. derbothaus macrumors 601


    Jul 17, 2010
    Some numbers. And as mentioned by other poster. NOT twice as slow. I was incorrect. Expect this on Geekbench.
    i5 @2.5GHz: 7185
    i7-940 @2.93GHz: 9268

    Your i7-950 would do slightly higher (100-200 or so). Real world may not even notice as it depends on your tasks.
  8. ri0ku thread starter macrumors 6502a

    Mar 11, 2009
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    Thanks man, doesn't the i5 in the iMac support turbo boost too? Up to 3.1ghz?
  9. Laststop macrumors newbie

    Aug 7, 2011
    If gaming is the number 1 thing you use your computer for then really the only apple product capable to run the latest games at max detail settings and resolution settings is the monster mac pro tower.

    And the core i5 sandy bridge cpu's are equal or better than the core i7 9xx x58 chip set cpu's in almost all computing tasks. The only situation where core i5 SNB loses is vs a 6 core gulftown with HT in a heavily multi-threaded workload and that's only cause its 4x threads being processed vs 12x threads being processed at once. SNB is faster at the same clock speed and also has superior single threaded performance. So basically each thread on sandy bridge can process more work then each thread in gulftown. And clock for clock SNB processes more work than x58. It's just a better architecture. Does more per clock and more work per thread vs previous gen
  10. derbothaus macrumors 601


    Jul 17, 2010
    Not true. Max resolution of 2560x1440 yes. Nothing Apple sells does that even though it is their favorite res.

    Wrong. So wrong. i5? Dude, the i7-980x will trample most of the i5's in single threads as they throttle to 3.6GHz. On multi it is no contest and i7-2600K can't beat i7-980x. SB architecture is more efficient but most of the gains are purely because of the turbo headroom being raised 1x higher.
  11. srcstc macrumors member

    Oct 22, 2010

    They're not the same so you can't.

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