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Well, it’s happened again – Apple’s online store went down briefly this morning, meaning that the secretive company was stocking its virtual shelves with new product. As expected, when the curtain was pulled back, we all had new iMacs staring us right in the face, and they brought with them the customary slew of incremental upgrades over last year’s models. If you were paying attention when Apple refreshed the MacBook Pro earlier this year, a lot of this is going to be familiar to you.

There were two major improvements in the MacBook Pros that made most of the headlines: an upgrade to Intel’s new Sandy Bridge processors, and the introduction of the new Thunderbolt port in place of the former Mini DisplayPort. Formerly code-named Light Peak, this Intel-developed port enables two-way 10Gbps transfer speeds between a variety of devices while also maintaining compatibility with existing Mini DisplayPort dongles and cables.

To see more about the particulars of Thunderbolt, you’ll definitely want to read the extensive write-up we did about the technology when it launched in the 2011 MacBook Pros – everything written there is true of the port in the new iMacs. You’ll definitely see Thunderbolt crop up in other Macs as the year goes on, and you may start to see it pop up in PCs as well depending on how quickly people jump on the bandwagon. Until then, use of the port in peripherals is and will probably continue to be rare, so the more immediate concern for us is the hardware upgrades in the new Macs.

2011 iMac Lineup
  21.5-inch (low-end) 21.5-inch (high-end) 27-inch (low-end) 27-inch (high-end)
Dimensions (inches) 17.75 H x 20.8 W x 7.42 D 17.75 H x 20.8 W x 7.42 D 20.4 H x 25.6 W x 8.15 D 20.4 H x 25.6 W x 8.15 D
Weight 20.5 lbs (9.3 kg) 20.5 lbs (9.3 kg) 30.5 lbs (13.8 kg) 30.5 lbs (13.8 kg)
CPU 2.5 GHz quad-core Core i5 2.7 GHz quad-core Core i5 2.7 GHz quad-core Core i5 3.1 GHz quad-core Core i5
GPU AMD Radeon HD 6750M (512MB) AMD Radeon HD 6770M (512MB) AMD Radeon HD 6770M (512MB) AMD Radeon HD 6970M (1GB)
RAM 4GB 1333MHz DDR3 (16GB max) 4GB 1333MHz DDR3 (16GB max) 4GB 1333MHz DDR3 (16GB max) 4GB 1333MHz DDR3 (16GB max)
HDD 500GB 7200 RPM 1TB 7200 RPM 1TB 7200 RPM 1TB 7200 RPM
Display Resolution 1920x1080 1920x1080 2560x1440 2560x1440
Ports Gigabit LAN, Firewire 800, Thunderbolt, 4x USB 2.0, SDHC slot, separate audio in/out jacks Gigabit LAN, Firewire 800, Thunderbolt, 4x USB 2.0, SDHC slot, separate audio in/out jacks Gigabit LAN, Firewire 800, 2x Thunderbolt, 4x USB 2.0, SDHC slot, separate audio in/out jacks Gigabit LAN, Firewire 800, 2x Thunderbolt, 4x USB 2.0, SDHC slot, separate audio in/out jacks
Price $1,199 $1,499 $1,699 $1,999

All iMacs now come packing quad-core Sandy Bridge processors, dedicated graphics with 512MB or 1GB of memory (the high-end 27” model can also be configured with a 2GB 6970M), Thunderbolt (one port in the 21.5” model, two in the 27” model), and an HD Facetime camera (which supplants the previous generation’s iSight camera, making the white MacBook Apple’s last product to carry the iSight branding). Update: Reader emails have alerted me to an iFixit teardown of the new iMac, which reveals that they're shipping with the new Intel Z68 chipset. We wrote a little about Z68 earlier this year - no word on whether OS X supports or plans to support any of its unique features at this point.

It's too bad to see that all iMac models across the board still come with 4GB RAM installed by default, and Apple's upgrade prices for memory remain ridiculous (bumping it up to 8GB across two 4GB DIMMS costs $200; market value for 8GB DDR3 kits is about $80). At least these iMacs continue to offer four RAM slots, versus the two slots on older iMacs - if 4GB is not a suitable amount for you, adding another 4-8 GB is easy and relatively inexpensive if you don't pay Apple's prices.

All of these internals are packed into a case that’s virtually identical to the aluminum unibody iMac design introduced in 2009, which itself was a gentle retooling of the aluminum iMac introduced in August of 2007. The point being, this refresh is all about the hardware inside: you’re not getting anything drastically thinner or lighter, and if you’ve seen an iMac in the last three or four years, you should have a pretty good idea of what you’re buying.

CPUs: The iMac Gets Sandy Bridged

Prior to the MacBook Pro refresh (and excluding the Mac Pro), the iMac was Apple’s only product line to transition completely away from Core 2 Duo processors to newer Nehalem-based Core i3, i5, and i7 processors – the white MacBook, the Mac Mini, and the MacBook Air lines continue to use the Core 2 Duo along with nVidia chipsets to save space and energy, and to get around using Intel’s previous-generation integrated graphics processor.

So the iMac wasn’t as far behind in CPU architecture as some of Apple’s other products, but the switch to quad-core processors across all models and price levels should give new customers a healthy speed bump over the previous generation. As we saw in our review of the Sandy Bridge MacBook Pros, Apple makes use of Intel’s Turbo Boost feature to make up for the quad core parts’ lower clock speeds relative to dual core parts in single-threaded applications.

The Sandy Bridge and Thunderbolt upgrades are more or less known quantities at this point – what impressed me most about the new iMacs was the GPU upgrade, especially in the entry-level iMac and the high-end iMac.

GPUs and Preparing for Lion
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  • Targon - Wednesday, May 04, 2011 - link

    There is a valid point about the false sense of security that Mac owners have. In the same way that people in rural areas do not feel a need to lock their doors, too many Mac people feel they don't need anti-virus software. Due to how many pieces of malware have been written for Windows machines, it has forced Microsoft to improve its products to lock it down and make it more difficult to infect.

    With that said, no system is completely immune, but MacOS really IS easier to infect than Windows 7 64 bit, and it is only because Apple marketshare outside of the USA is very very low, to the point where most malware authors don't pay attention to it.
    Reply
  • nitro912gr - Wednesday, May 04, 2011 - link

    I don't disagree that no system is really safe, but as far as I use both platforms I have noticed that in windows it is more easy for something to sneak in and mess up.

    MacOS is a more closed environment with it's +/- it have. One of the + is that is not that easy for random virus to sneak in.
    However after windows vista I have noticed that windows too are more difficult to let something to sneak in.
    Still however I believe macOS is safer, for the very reason that is less popular and have less virus.

    So far I don't felt the need to get an antivirus for my macbook. Things happens, times changes however. Sooner or later it will be necessary.

    Here I want to notice that many people use pirated software and windows, and this give a thousand more ways for virus and maleware to sneak in, but they don't realize it and blame windows. This is wrong, windows have come a long way and are a mature system today, it is up to your needs or likes to which platform you will prefer in the end.
    Reply
  • edsib1 - Wednesday, May 04, 2011 - link

    Your quoting from that article about the pwn2own hacking convention where OSX was the easiest OS to hack, and Safari the easiest browser arent u?

    I recognise that bit about rural people not locking their doors.
    Reply
  • psychobriggsy - Wednesday, May 04, 2011 - link

    Are you barking mad? Reply
  • edsib1 - Wednesday, May 04, 2011 - link

    A high-end price for performance that can at best be described as 'mid-range'.

    Having Thunderbolt (very useful atm) - but only USB 3.0 - bizarre!

    For $2000 - wheres my blu-ray recorder?

    Good improvement from last years range - but I just dont see why you buy an Apple.
    Reply
  • edsib1 - Wednesday, May 04, 2011 - link

    yes I meant only USB 2.0 - bizarre! - but theres no edit button. Reply
  • royalcrown - Wednesday, May 04, 2011 - link

    Actually the ( DUAL ) thunderbolt ports will have adapters to support USB 3.0 or firewire 800 and hDMI as well as DVI according to CNET. The 27 inch imacs also suppory HDMI input via an adaptor ( granted at native, 720, and 480p ), so at least it is and option. External BLU RAY players are $99 dollars if I want one. Reply
  • edsib1 - Wednesday, May 04, 2011 - link

    please explain how u play a blu-ray on a mac... Reply
  • royalcrown - Wednesday, May 04, 2011 - link

    Like this:

    <a href="http://s1191.photobucket.com/albums/z469/drinkoldc... target="_blank"><img src="http://i1191.photobucket.com/albums/z469/drinkoldc... border="0" alt="Photobucket"></a>

    And you run it in windows of course...
    Reply
  • royalcrown - Wednesday, May 04, 2011 - link

    or this since IE9 is sucking today:

    http://i1191.photobucket.com/albums/z469/drinkoldc...
    Reply

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