Diagrams detailing Apple’s new liquid cooling system posted online

“Last week Apple Computer, Inc. introduced its most powerful Power Mac model to date, which sports two 2.5GHz G5 processors and a nifty liquid cooling system (LCS). Curiosity surrounding the new LCS is running high as Apple officials have recently reiterated warnings that other G5 products from the company remain a long-shot due to G5 heat issues,” Katie Marsal reports for AppleInsider.

“Aiding some of the curiosity, sources have recently provided AppleInsider with side and rear-view diagrams of the new Apple LCS, which detail some of its many components,” Marsal reports.

Full article with diagrams here.


  1. Hey artist, didn’t you realize you were first…..oh, nevermind. Wish I could afford a new G5, but the old GigE with a 800 upgrade will have to suffice for now.

  2. Cool. I am surprised that the liquid cooling thing has not had more press…..CNET made no mention of it when they announced the new G5s….I know CNET sucks crap…but still…I thought this was a pretty significant move in consumer tech.

  3. Someone last week was complaining that the heated liquid from the first G5 processor was being pumped to cool the second G5, and therefore heated water was being sent across the processor. I don’t see that as happening on this diagram.

    freebee, the mainstream press doesn’t get it. They never do.

  4. Has anybody heard anything recently about Apple working with Cooligy? I thought they were doing something for laptops together……

    (panting, drooling, and hopping from one foot to the other waiting for a G5 laptop)

  5. Jimbo von W.:

    Yes, the processors cooling system is in series. This is very evident from the rear view diagram.

    Re: Rear View – From the exit of the radiator (arrow 3), it goes to the pump, then to the processor on the right, directly to the processor on the left, and then to the entrance of the radiator (arrow 6).

    While at first glance this may seem like a poor idea, judging the size and surface area of the radiator, it seems like it could easily support 4 processors in this series fashion. Although the last CPU in line may be getting drenched in warm coolant, it is very likely that it is still much cooler than the CPU itself. As such, placing them in series greatly reduces the amount of tubing and makes redesigning it for 3 and 4 CPU systems much easier and less complex.

    This is NOT nuclear reactor levels of heat and steam. The fluid is being pushed at a rate well before the fluid reaches anything close to the CPU temps. So, it may be true that the last CPU in line receives warmer fluid than the others, it still greatly cools the CPU, and the cost savings of the series design outweighs trying to get insignificantly cooler fluid to all CPUs.

  6. Another over-rated system from apple…
    Hello people!!! this is a 2.0 overclocked to 2.5….Duh…
    As if Apple invented the 1st liquid cooled system ever?
    They are becoming more and more like MS….
    The performance gain just isnt worth it…

    Apple, it seems, has given up on selling people on switching. With systems starting at $2000 AND a need to buy a new monitor there’ll be precious few people “taking the plunge.” The benefit to doing so, of course, is that Apple can earn higher margins and possibly offer even higher performance by configuring for workstation-class hardware. The disadvantage is that it turns the Apple desktop market into a closed system, with a very high financial barrier to entry. The mobile market’s a different story, which perhaps implies that Apple sees a new and different future there, completely separate from the desktop.

    Its not the new G5 workstation that kills Apple as a personal desktop computer company – its their failure to offer anything else save an aging and under-performing G4 that grows less compelling each and every day. Does this mean that Apple is finished? Absolutely not. But it does concern me, given that every computer manufacturer that formerly specialized in large, expensive PC’s has been looking for ways to cut costs and offer cheaper systems, not the other way around.

  7. NoMacForYou!-

    I’ll be making the “plunge”, and here’s why:

    I want a machine I KNOW I can count on, with an operating system that works and is actually fun to use instead of one that’s about as much fun to use as a cheese grater on my testicles. I’ll pay a little extra for ease of use, elegant design that doesn’t sacrifice functionality, and an overall package that stomps WinTel garbage. Plus, I don’t want to wait for M$ to:

    1. Roll out schlonghorn
    2. Actually start caring about security
    3. Generally produce an OS that doesn’t SUCK

    Just wait for the WWDC announcements

  8. re: NoMacForYou

    why are you wasting time on an Apple site?

    Also, MS doesn’t make hardware, so, no – Apple is not becoming more like MS. Think before you speak…

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