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Will Liquid Cooling be Coming to the iMac?

The first time that we learned of Apple seriously working on a liquid cooling system for an iMac was in a January 2008 Apple patent. The patent told us that Apple had been working on a liquid cooling system for a future iMac since 2006. To be fair, the system Apple first described, was in context with is an iMac-like docking station. Yet the fact remains that if an iMac-like docking station was on the drawing board for a liquid cooling system in 2008, then the likelihood of that extending to the iMac is nothing short of being a no-brainer. Why would Apple want to add liquid cooling to the iMac? Because with Apple now adopting true Intel desktop chipsets for the iMac, we keep hearing about heat issues – and it's only going to be getting worst as time goes on.

Screaming Hot Sandybridge

As we go forward, Intel's upcoming Sandybridge desktop architecture will only complicate things for the iMac. Future Sandybridge based iMac's are likely to offer us 8 core configurations - and if Apple follows current PC trends, then we're likely to see an iMac graphic card option pushing the 1.5GB mark or beyond by 2010 or 2011. Heat issues are only going to be compounded if a cooling system doesn't surface for future iMacs.


Further support for the concept of a liquid cooling system for the iMac surfaced again in a secondary Apple patent in November 2008 under 20080291629. Although labeled as a liquid cooling system for a portable, the patent itself included desktops, as follows: "Embodiments of a cooling mechanism, a computer system (such as a desktop computer and/or a laptop or portable computer) that includes the cooling mechanism and a method for cooling a computer system are described."


The liquid cooling system described in the patent noted above, pertained specifically to a design for a compact computer space - proving that the design had nothing to do with a more complicated liquid cooling system for such systems as Apple's Mac Pro type of desktop. Below is Apple's patent FIG. 1 of the latter patent noted above.


2 - Apple Liquid Cooling System for Desktop & Notebook Computers

iMac at a Crossroads

Apple's iMac may soon be coming to a crossroads. Could Apple be contemplating a shift to an all-new iMac design so as to mask the fact that they need to abandon their ongoing craze of all things thin? Or – will we see Apple split their iMac line-up into two distinct camps?

Apple could continue to offer iMac's with a notebook chipset for lower-end units so as to keep the trend of going ever thinner on track towards an iMac Air style of unit while keeping the screamer desktop chipsets for a new line of iMac's simply branded the iMac Pro.

Theoretically, such a line would be in keeping with their notebook branding and would allow Apple to introduce a new line of iMac's that could offer us more robust specifications and/or options such as: a liquid cooling system; larger hard drives; a Blu-ray optical drive; superior sound system options; solid state drives; a TV tuner and so on and so forth. Of course such a move would justify adding a little extra depth – but still – it being better than having to leap to the Mac Pro's stiffer pricing.


On the other hand, Apple could simply surprise us with a new mini-tower Mac Pro with pricing closer to the iMac. Only time will tell which way Apple goes.

The Bottom line

The bottom line is that as Apple prepares for a Sandybridge based 8 core based iMac with 8-12 GB of RAM and a screaming video card – there's a great chance that Apple's patent pertaining to a liquid-cooling system will leap off the drawing board pages into a real-world product. The consequences of such a move may also usher in a new direction for the iMac and this report presented you with a few ideas.

The questions for you, of course, are simple: Do you think that Apple will add a compact liquid cooling system to a future iMac and do you think that the iMac is at a design-crossroads?

Notice: Patently Apple presents only a brief summary of patents with associated graphic(s) for journalistic news purposes as each such patent application and/or grant is revealed by the U.S. Patent & Trade Office. Readers are cautioned that the full text of any patent application and/or grant should be read in its entirety for further details. For additional information on any patent reviewed here today, simply feed the individual patent number noted above (20080002350, 20080291629) into this search engine.


More info on Asetek Cooling see this new webpage.


Update, July 2010: Asetek Liquid Cooling All-in-One PC Video


Electricity and water do not play nice.

That's a 24" with a notebook chip. That's not going to be a problem and nor is it the issue at hand. The i7 and Sandybridge are where there could be a problem. I don't know where Apple will go because they can't keep getting thinner and offer higher end chips and graphics cards without consequence. I've been hoping for a mini tower that's about the price of a high end iMac for years. That's what I want and hope happens.

My 24" 3.06 iMac runs very cool. I keep Temperature Monitor running all the time to see if there are any overheating problems and I have found none. In my normal work mode the processor temperatures run at around 100 degrees F. The 1TB drive usually stays about 110 degrees F. I use iMac Fan Control to adjust the fan speeds depending on the temperature and I rarely ever hear the fans even if I'm encoding a DVD or converting video files. I think these larger screen iMacs have much larger heat sinks spread out over a larger area to hold heat problems to a minimum.

The G5? This has nothing to do with an ancient G5 tower and Apple's redesign, well after the G5, is for a compact design. Maybe Apple has learned something here.

The point on a redesign instead of cooling system is definitely a possibility as well. Tough choice

I think Apple has put the Mac's on the back burner for some time. The new iMacs are great, however there was little to no advertising for them. Now that the iPad is out I hope the Mac will start getting some attention.

Although heat will always be an issue with compact designs and Apple appears permanently wedded to the idea that thinner is better, I'm scared of any liquid cooling system. A lot of liquid cooled G5 towers leaked. Although the system described above is different, the potential for damage inside a compact iMac case is far greater than in a big tower.

If Apple intends to keep up with the industry and use desktop parts they need to have true desktop cooling. However, I wouldn't put it past Steve Jobs to decide that nobody except pros needs a desktop anymore and discontinue the iMac completely.

My i5 iMac gets really hot. I can't imagine it getting any hotter before Apple is forced to do something.

I would dearly love to see such an iMac and the sooner, the better!

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