i5 or i7

So, I’m getting a desperately needed new iMac.

I’d been planning to get the i5, but after seeing this report I think I’ll plump for the i7. It’s on sale today for AUD$2,758.01 (don’t forget the 1c).

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13 Responses to “i5 or i7”

  1. Wincent Colaiuta Says:

    Ah interesting, 91€ off across the entire line. If I had the cash in the bank would indeed “plump” as you say.

    I wasn’t even thinking about an i7 though. I was thinking of going for the low-end 27″ model (with the Core Duo processor) which is 1358€ over here (1449€ tomorrow). My only misgiving with that model is the wimpy graphics card driving such a large display, thus pushing me towards the i5 model (1658€ here today, 1749€ tomorrow).

    But as I don’t have the liquidity right now for any such thing, it’s all moot for me.

    As for you, well, don’t know. Don’t think you’d really need the extra performance of the i7 for your workloads (the Rails dev I mean); the slowest part of it is running the test suite, and that’s probably mostly disk-limited anyway. (Although knowing you, I’ll bet the test suite is small enough that even running slowly it doesn’t take long…)

  2. Sho Says:

    Well, what I really need is more memory. This MBP is limited to 3GB and currently has 2GB – it’s dismally inadequate. The first thing I’m going to do when I get a new machine, whatever it turns out to be, is put 8GB into it – I can’t wait to be finally free of the memory starvation that dogs my every workday on this thing.

    I’d thought about the i5 and was intending to get it – but the i7 is only a little more and according to that report it appears its performance is drastically improved in some areas. The hyperthreading seems to make a big difference when running virtual machines – a big use case for me. Since it’s only $250 or so more, there really seems little reason not to get it. It’s certainly a hell of a lot less than a Mac Pro or something, which start to look like pretty poor value compared to the new iMacs.

    I didn’t actually buy one yesterday, as I realised that I’d only be saving $11 over the education discount I can usually get – not enough of a saving to force my hand. I’m still thinking about it and will probably act next week.

  3. Wincent Colaiuta Says:

    For me too memory is the real performance limiter for some larger applications that I run. My machine only has 2GB. Raising that even to 4GB would make a huge impact.

  4. Sho Says:

    Yup, RAM’s what it’s all about. Surprising that your iMac has such a low memory limit!

    If I was using the unit solely for Rails I reckon the i5 with 8GB of RAM would be a close to perfect development machine.

  5. Wincent Colaiuta Says:

    Don’t know why you need so much memory for Rails development. I reckon it could be done fairly comfortably even on a 1 GB machine (or a 2 GB machine allowing for various open windows in bloated browsers for things like consulting documentation and testing).

  6. Sho Says:

    My experience could not be more different. I am constantly butting my head against the 2GB limit on this machine.

    It’s probably related to my working style – I have a lot of things open and constantly switch between them. Once you’ve got Mail, iTunes, a couple of web browsers with a few tabs each, some Rails instances and a text editor – I’m way over 1G by that point and usually over 2, pushing things into swap and making my reflex command-tab take several excruciating seconds rather than the instant response I would strongly prefer.

    I’m running basically what I describe above right now and have about 50M free. The system is responsive enough right now but that’s not a lot of headroom. All it takes is for one rails instance to grow a bit, or I need to load PhotoShop or some other memory intensive program, and the working experience turns quickly to frustrating delays and inefficient coping mechanisms such as only keeping one “big” program open at a time. Pretty far from the way I want to work.

    And as for why I’d need 8GB – well, why not. Memory is cheap and I just want to forget about any kind of memory worries for a long, long time. 2GB of memory for that model imac is $72 at my local shop – a no-brainer. With 8GB, firing up a VM to check something on Gaydows is a whim and a click of the mouse – currently it’s basically impossible, and even with 4GB I’d at least have to think about it. I look forward to just not having to even consider the idea that there might be a limit on available RAM for a couple of years.

    top -o rsize
     
    Processes: 114 total, 6 running, 1 stuck, 107 sleeping, 541 threads    14:51:17
    Load Avg: 0.36, 0.64, 0.64  CPU usage: 37.40% user, 15.26% sys, 47.32% idle
    SharedLibs: 5336K resident, 2488K data, 0B linkedit.
    MemRegions: 18819 total, 813M resident, 21M private, 327M shared.
    PhysMem: 198M wired, 1227M active, 577M inactive, 2002M used, 46M free.
    VM: 260G vsize, 1035M framework vsize, 2900221(0) pageins, 871037(0) pageouts.
    Networks: packets: 60415061/38G in, 54901544/22G out.
    Disks: 14615814/186G read, 5516032/114G written.
     
    PID    COMMAND      %CPU      TIME     #TH  #WQ  #POR #MREG RPRVT  RSHRD  RSIZE
    25765  Mail         8.2       30:43.24 14   8    296- 534-  78M-   38M    187M-
    25802- firefox-bin  4.6       17:50.78 15   1    222  1348  76M    25M    158M 
    26872  ruby         0.0       00:14.40 1    0    21   219   130M   796K   132M 
    59     WindowServer 7.3       05:03:40 5    1    513  1804+ 16M+   108M-  124M+
    0-     kernel_task  7.2       06:33:12 64/3 0    2    760   6984K  0B     111M 
    345    Terminal     47.3      68:32.50 5/1  1    253+ 442   60M    40M    110M  
    48402  Finder       0.0       38:36.47 10   3    372  907   40M    46M    84M 
    19951  Preview      0.0       01:25.60 3    2    116  370   22M    29M    84M 
    94252- TextMate     0.0       23:37.13 75   1    314  556   48M    49M    67M 
    55186  QuickTime Pl 0.0       54:38.12 29   1    341  844   30M    37M    57M 
    26877  ruby         0.2       00:12.11 2    0    19   149   48M    692K   50M 
    26     mds          0.0       35:50.28 5    4    121  400   31M    14M    50M 
    19885  ruby1.9      0.2       08:29.05 2/1  0    38   217   40M    2608K  43M
    26842  Transmission 4.8       02:39.43 4    1    113  215   22M    17M    35M 
    24479  mdworker     0.0       01:37.55 3    1    76   196   10M    9048K  32M 
    1064-  iTunes       0.1       02:09:04 15   2    297+ 523+  8500K+ 27M    32M+
    285    Activity Mon 0.8       05:35:44 2    1    124  358   9472K+ 36M    21M 
    93790- iTunes       0.4       34:18.07 18   1    319  482   11M    17M    21M 
    247    Dock         0.4       02:45:32 3    1    153  519   6744K  26M-   18M 
    45623- CSSEdit      0.0       06:23.06 5    2    183  385   8596K  22M    17M 
    231    loginwindow  0.0       17:31.89 2    1    252  348   6076K  14M    14M 
    248    SystemUIServ 0.0       74:52.62 3    1    274  303   6012K  15M    14M 
    186    SystemUIServ 1.3       02:28:52 3    1    266  266   5852K  8968K  13M 
    187    Finder       0.0       06:53.21 5    1    181  247   4700K  15M    11M 
    46     coreservices 0.0       04:23.41 4    1    452  358   3464K  12M    10M   
    26927  Software Upd 2.8       00:00.75 7/1  2    114  103   3732K+ 11M    9700K+
    185    Dock         0.0       00:17.61 3    1    107  211   1320K  14M    8992K 
    362    AppleSpell   0.0       01:54.68 2    1    40   70    1932K  6012K  8784K 
    26859  quicklookd   0.0       00:03.22 6    2    86   87    9348K  5444K  8692K 
    211-   WeatherDock  0.1       24:17.12 5    2    103  131   5096K  6140K  7080K 
    28     loginwindow  0.0       01:05.98 2    1    229  175   2788K  11M    6812K 
    26920  mdworker     0.0       00:00.40 3    1    48   67    2068K  6084K  6392K 
    26500  ruby1.9      0.2       37:10.70 2    0    36   56    5580K  308K   6356K 
    15     DirectorySer 0.0       08:01.85 5    3    77   290   2880K  244K   6232K 
    397    beam.smp     0.3       59:58.94 36   0    134  127   4504K  328K   5664K 
    30790  Kotoeri      0.0       01:37.30 2    1    88   253   1844K  8748K  5084K 
    26929  suhelperd    0.0       00:00.05 2    1    35   43    1892K  1884K  4796K 
    23     securityd    0.0       01:54.58 2    0    151  68    3168K  1920K  4712K
  7. Sho Says:

    Unfortunately, it seems I should have acted sooner – the machines are now out of stock!

    I am not particularly happy about ordering from the Apple Store – I like to carry the box home right there and then – but seems I might have no choice, unless I want to start making calling the local Apple Stores for availability updates a daily routine.

  8. Wincent Colaiuta Says:

    My last 2 or 3 machines have all come from the Apple Store. I actually quite like having it delivered right to my door, and they’re pretty quick.

  9. Sho Says:

    I like buying big things in person. Perhaps if I did it more often, the store would look more appealing.

    Especially if there’s a problem – a cracked screen, or a dead pixel – being able to go back to the physical store that very day, receipt and offending item in hand, and demand satisfaction is convenient to me.

    Higher on my list of concerns in this instance, though, is the nature of stock priority. Once I place an order on the web site, they have my money, or the guarantee of it anyway. I am a low priority, despite my order being unfilled. In the stores, however, if they don’t have stock customers will walk away. The stores will thus receive stock first. I don’t want to wait weeks.

    Ah well, busy for the next few days anyway – will step up the campaign later this week.

  10. Wincent Colaiuta Says:

    Did you end up getting one of these things?

  11. Sho Says:

    Yeah. I got a i5 in mid Dec. But then I went straight on holiday, so I haven’t been able to use it until I got back yesterday.

    I have nothing but praise for it – it’s the best machine I have ever owned by a long, long way.

  12. Wincent Colaiuta Says:

    Awesome! Glad to hear it.

    I am hoping to get a new machine pretty soon too, but will have to see if some payments that are owed to me come in or not. Right now am leaning towards the i7 due to the superior graphics card (doesn’t make much sense to have an enormous display if you don’t have a gutsy card to properly exploit it) and the fact that quad cores would be well suitable to my workload (parallel compilation).

  13. Sho Says:

    I thoroughly recommend you, and everyone else, buy this machine immediately. It’s the best mac ever made, full stop, and you will find its performance and screen quality an utter joy.

    The i7 shares the same graphics card. The only difference is a slight upclocking and the enabling of HyperThreading, which I always thought was a load of crap. I didn’t judge the 10% price premium (it ended up more than 20% actually – I was able to get a very good price) worth the 5% increase in performance, and I didn’t want to wait two weeks for delivery, so I went with the i5.

    Absolutely get the quad cores, they’re a new generation and the leap from the Core 2 series is very noticeable. I can’t recommend this machine enough. Remember when macs were expensive? A price premium? I paid AUD$2339 for this thing and I feel like I got the deal of the fucking century!

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