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Looks like a water cooled heat pipe? Has to be a heat pipe on the two CPU's as there is only one pipe coming off it. From there it looks as if it goes into an exchanger and then attached to another water cooled exchanger. Or maybe not?

Well maybe not. It looks like the CPU's are water cooled and the heat pipes are for something else?

Maybe it's a crazy idea, but isn't the plate where the boards sits just a giant heatsink?

Quote:

Originally Posted by Jag

Maybe it's a crazy idea, but isn't the plate where the boards sits just a giant heatsink?

Looks like a big water block to me. The hoses are connected to it?

It seems to, don't know for sure.

Yeah, the big plate the CPU modules are bolted to is the water block.

The heatpipes look to be for cooling the voltage regulators.

Quote:

Originally Posted by Groth

Yeah, the big plate the CPU modules are bolted to is the water block.

The heatpipes look to be for cooling the voltage regulators.

Yep that's a lot like the original G5 CPU, it had 4 heat pipes on the CPU
and 2 on the Power Supply. The Vcore supply is on the CPU board.
Which makes sense since that supply has to deliver upwards of 20Amps.
It's a 4 Phase switching supply using integrated FET modules for each phase.
TONS of ceramic decoupling/supply filter caps.

Here's a link to an engineering drawing of the watercooling module
http://www.hardmac.com/news/photonew...terblockg5.jpg

And a Photo of one in assembly.
http://www.hardmac.com/news/photonews18/sideview.jpg
http://www.ocforums.com/showthread.p...1&page=2&pp=30

More pics at Techseekers. I guess apple doesn't fear aluminum and water.

Quote:

Originally Posted by pHaestus

Apple is INSANE if they are selling extremely expensive workstation class computers with POS pumps. In fact, I bet apple engineers know the MTBF far better than some bozo on the internet; care to wager?

Adequate (within safe CPU operating temperatures even in a hot room) and RELIABLE cooling at lower noise levels than air is the goal here; quite different from what DIY or aftermarket solutions go for.

exactly,
it is WCing - I'll say more after Apple does

Quote:

Originally Posted by unregistered

exactly,
it is WCing - I'll say more after Apple does

Any idea on what kind of coolant they are using with all that aluminum?

Got to hand it to them, it is a nice setup...

Quote:

Originally Posted by HAL-9000

OSX comes in two flavors, 32-bit & 64 bit. The only 64-bit Doze currently available is Server 2003. There will have to be a Athlon Doze, and a Itanium Doze I think. 64-bit Doze for Athlons is in beta. I know because I test it right now on a Opteron.

Many applications, including the whole Adobe suite and Lightwave, amongst others, are compiled for OSX in 64-bit already for sale. You can plug 8GB in your G5 to run those applications. 32-bit can't address more than 4GB or so. So there is a difference. This isn't some fluke, its just one of the few times where its convenient that the hardware guys and the OS guys are in the same company. They were ready for the OS when the hardware was ready. And depending on Microsoft to make launch dates is a formula for doom. Look at the Itanium fiasco. Talk about egg all over Intel's face. This is the biggest goof they've made since their RDRAM adventures of yore.

Don't get me wrong, I'm not some apologist for Apple. But the facts are the facts....and those are the facts.

There is no 64 bit OSX and no 64 applications for said fictional OS. OS10.4 will probably be the first to have a 64 bit version.

Windows NT, 2000, XP and 2003 are or were made in 64 bit versions (remember NT was orginally designed to run on 64 bit Intel RISC chips and later ported to x86). Presently though only XP and 2003 are still available in 64 bit mode.

Yup, similar hacks as 32 bit windows has been doing for almost a decade to overcome the 4GB limit on 32 bit systems. Fortunately we've got a good 2.5 years before 32bit addressing becomes a real problem on the desktop, so MS, Intel, and Apple have time to get their problems sorted out.

Also, about 64 bit PS: PS can't even address >2GB of ram (its horrid memory management is a relec of the early 90s). Don't expect a 64 bit version thats actually 64 bit unless they get around to rewriting the app from scratch.

Quote:

Originally Posted by redleader

There is no 64 bit OSX and no 64 applications for said fictional OS. OS10.4 will probably be the first to have a 64 bit version.

Yep, it looks like Tiger (10.4) will have 64 bit pointer support for apps.
http://www.apple.com/macosx/tiger/unix.html

Is this a 'true' 64-bit OS? dunno, I'll leave that debate to the ComputerSci majors,
but 'a 64-bit version of libSystem' seems to imply it's integrated into userland apps
if needed by them.

And the monitors... 2560x1600 LCD anyone... too bad that Geforce 6800ultra isnt
watercooled as well, I bet that fan makes quite the racket.
http://www.apple.com/displays/digital.html

Nothing a couple feet of tubing and a waterblock wouldnt solve, since you've already
got a pretty nice radiator and pump module in the CPU bay :)