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In-tower phase change: concept design

post #1 of 16
Thread Starter 
Phase changers, gurus among gurus, I need your opinions.

I am new to these forums, the idea of extreme cooling, even overclocking itself. However, after several days of perusing overclock.net, I think I'm starting to get my bearings.

I have come up with a concept design that will house a basic phase change system inside of PowerMac G5 case. I have everything measured down to the millimeter using Photoshop and the dimensions of all of the involved components. It should all fit.

Before I go any further, please see the attached .jpg for reference.

Also, I'm posting this here so you guys can tear down my concept if it's unrealistic or just doesn't plain work.

The compressor itself is 1/4 horsepower. The copper piping travels from there down into the PSU chamber. The G5 PSU is oddly long and thin, so it makes a good sealed chamber for my condensor of choice:

Antifreeze!

I'll bend the copper into a zig zag shape for maximum heat dissapation.

Here comes the next tricky part. I'd like to cool both my CPU and GPU with this system. I haven't heard any mention of a Y splitter on this site and I don't understand why. Would this work?

Install the Y splitter at the end of the condensor line. Then run two pipes of the condensed refrigerant to the CPU and GPU respectively. Finally, merge the evaporated gas back into one pipe with another Y splitter.

Perhaps the CPU and GPU pipes could be 1/2 the diameter of the combined pipe. Would this promote even flow to and from the two processors?

Missing from the picture are the hard drive and DVD burner, housed in a seperate compartment above what you can see in the .jpg.

So people, what do you think?

Here are links to parts in question.
AMD Athlon X2 4400+
ASUS Mobo
G5 Case
580W Modular PSU
Radeon X1900 XTX
1/4 Horsepower Compressor

Also, feel free to critique the setup I have listed in my sig if I'm bottlenecking anything or making any dire mistakes.
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post #2 of 16
If I am not mistaken, I think that trying to cool the CPU AND the GPU would cause to large of a heat transfer into the loop. Someone correct me if I am wrong.

You may want to consider two peltiers and having them watercooled or two seperate phase chage loops... assuming you want to cool them both.
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post #3 of 16
Thread Starter 
I don't know much about peltiers. I'm looking for an all-in-one solution, contained entirely inside the case in its (near) original form. If have have to forget GPU cooling to do that, no big deal. However, I'd like to leave the possibility on the table for further exploration and ideas.
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post #4 of 16
well i'm still a noob with phase changes, but i think that you need two different phase changes due to the 2 evaporators and only one condensor. i think that you need a condensor for every evaporator that you have. someone please correct me if i am mistaken
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post #5 of 16
No, you can have as many evaporaters as you want.. But it will suck. Too spread out, not enough condensing going on, bad temps. But a dual head evap phase change isnt impossible, just havea good condensor.
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post #6 of 16
There are phase changers on the market that are double or even tripple headed (CPU and GPU and CPU + SLI GPUs) but I doubt you'll get very good temps, either way I'd phase the CPU and just get an AC Silencer or Zalman VF900 for your GPU (I dont think the VF900 is out yet though) since either would cool the GPU down far more than you'd need, you're not gonna need to overclock that x1900xtx even if you get your 4400+ to 4GHz as it would still likely be a pretty big bottleneck.
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post #7 of 16
Thread Starter 
Ok. Does a CPU even exist that will eliminate this bottleneck? Or better yet, a cheaper one that I can overclock to its specs?

Also, as I understand it, the only limiting factor in overclocking beyond heat (and whether your motherboard allows it) is voltage. How far can you push a high-end AMD before your voltage is "maxed out?" (I don't think I'm quite ready for volt modding). Is there anything else about my choice of motherboard that would cripple my ability to OC?

Finally, in reference to my diagram:
Does all copper piping exposed to air need to be insulated to prevent condensation? Will my antifreeze chamber sufficiently condense a refrigerant gas?
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post #8 of 16
I doubt it.Not even the fx60 can say no bottleneck so i dont think theres a lot of chance of anything cheaper..lol
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post #9 of 16
As far as mobo, I would recommend a DFI... I know lots of people use the Lanparty SLI-DR and it supposedly overclocks really well since you can put a lot of voltage on your ram which can limit bottleneck you oc. I have one but have yet to oc it so I can only go with what I have read thus far.

As far as processors, apparently opterons are the hot thing. They can clock really high, some people have gotten them into the 3GHz. What kind of speeds are you looking for? Knowing how high you want to go will narrow the selection of possible processors and other hardware such as your ram. In terms of "bang for your buck" there are many low price 2-2.4 ghz processors that can hit 2.6-2.8 and with phase change possibly more.
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post #10 of 16
Thread Starter 
Quote:
Originally Posted by dolinn
As far as processors, apparently opterons are the hot thing. They can clock really high, some people have gotten them into the 3GHz. What kind of speeds are you looking for? Knowing how high you want to go will narrow the selection of possible processors and other hardware such as your ram. In terms of "bang for your buck" there are many low price 2-2.4 ghz processors that can hit 2.6-2.8 and with phase change possibly more.
"Possibly more" being the key term there, heh. I was hoping that phasing the processor I have here plus a bit of extra voltage would get me to 3.0. But then again I am new to this whole deal, and I haven't yet had to face the cold reality of knowing I can't squeeze any more performance out of my hardware.

Opterons aren't dual core though, are they? I mean, which is better, getting 3ghz or having 2 cores @ 2.8 ish?

I know that dual core improves multitasking. Duh. The most cpu intensive things I'll be doing on this machine are:

Video Editing
DVD Ripping and 2 pass H.264 Encoding (multithreaded, 2 cores should help)
Playing Battlefield 2, CS Source, and FEAR
Maybe maybe 3D rendering

Thanks for you guys' help so far by the way.
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