Quieting a Dual G4 MDD

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simon_C's picture
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Quieting a Dual G4 MDD

alright, i will be aquiring a dual 1.25ghz g4 MDD for christmas. from what ive heard (quite literally) they are very loud due to the power supply fans.
there are numerous tutorials on the internet about replacing these and the processor fans, but none of them very clear at all.
i cant seem to find any good, quiet replacement fans anywhere but vantec.
any help and suggestions for the quietest replacement fans would be very helpful.

thanks

Simon

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Panaflow fans are the best.

Panaflow fans are the best. You can use dynamat if you'd like, that's good for about 4db.

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I second the panaflo's. I hav

I second the panaflo's. I have two 92mm panaflo's in my G4 conversion here, very quiet even if I run them at full speed. www.directron.com has a large selection of fans and good prices. I have purchased many fans from them. And you can get different connectors on many of them.

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what about vantec? they any

what about vantec?
they any good?

thanks for the help guys :macos:

simon

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I use vantecs in my dual 533.

I use vantecs in my dual 533. One big 120mm case fan and the 60mm heatsink fan. Not the quiteest ones out there but much quieter than the origional ones. Though I have a big ass hepa filter running in my room all the time so it doesn't really matter, I could have the origional xserve in here and I wouldn't be able to hear it.

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I have the same machine, (MDD

I have the same machine, (MDD Dual 1.25 G4). It rocks, congrats, and good luck with it. As for the fan noise, from the factory they were very loud (think Boeing 747 flying low over your house). Apple issued a recall/exchange in the past, where they sent you a new power supply with quieter fans, and a quieter case fan. I dont think you can still participate with the exchange, but perhaps you could give them a call and see if they'll send you the kit (you may get lucky, they may have a few still laying around). During the recall period, you just had to pay shipping, so who knows, you may get lucky. Short of that, you can replace the "big fan", that seems to be the biggest offender when it comes to noise. Its the big fan in the center of the case that blows air across the heat sink when the case is closed.

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actually, i was looking at ul

actually, i was looking at ultracompact watercooling systems from coolerguys.

particularly this one: http://www.coolerguys.com/840556000389.html

but with this waterblock: http://www.coolerguys.com/840556037200.html

small system, so i could fit it whereever i can.

then get some panaflo fans for the PSU to quiet it up a bit

i was thinking either that watercooling setup, or just getting 3 new fans from panaflo Acute

hmm, im cheap, soooooooooo...............cheap fans it is

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Re: what about vantec?

what about vantec?
they any good?

They are OK, but they are actually pretty noisy. They just make low frequency noise instead of high frequency noise. The panaflow fans are much quieter.

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!

SCREW IT ALL!!!!

got g5 instead :macos:

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Lucky dog!!!

The only Computer stuff I got was a WebCam>

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Liquid or air cooled? Mine i

Liquid or air cooled? Mine is liquid!! Oh, and if anybody knows how to get seti at home not to wig out the fans I'd really like to know.

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How often does the coolant ne

How often does the coolant need changing?

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Never

Never, by the user. It's a small closed loop system, no resivor that I can see. Technically I can pop out the little plastic rivet that holds the G5 panel on and look at it up close, and not kill the warranty. I just have not figured out how to do it without scratching it.

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Even closed loop systems need

Even closed loop systems need the coolant changed and loose coolent slowly...well, at least the PC versions..

Must be well made Smile

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Did you guys notice that high

Did you guys notice that highly compressed sponge on top of the power supply? That's to catch the drippings. There is a screw cap covering the fill nozzle on the G5 liquid cooling system.

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Any time you maxx out the CPU

Any time you maxx out the CPU's the fans are going to spin up. Be it seti, folding, ot dnetc. You max out the cpu's, they generate a lot more heat, which will make the fans spin up.

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Actually the thermal manageme

Actually the thermal management system on the G5 is way more complicated than it needs to be. It will spin the fans up if the CPU's suddenly start to draw a lot of current in anticipation of a high thermal load rather than allowing thermal mass to buffer the heat and control the fan from die temperature like it should be.

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New Quieting Question

Since simon seems to have no use for this thread any longer, I'll see what I can get out of it.

New PowerMac Quieting Question:

What size fans are used in the 466 Digital Audio model PowerMac? I'm pretty sure the main one is 120mm but I'm not positive about the one in the power supply. 80mm maybe?

I got an 80Gig Western Digital HD for the holidays and I was amazed how much quieter this thing got, I can actually hear the CD-ROM accessing now. The fans however still sound like a leaf blower outside my window.

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The 120mm fan gets real noisy

The 120mm fan gets real noisy as dust builds up on it. a clean one is far quieter. Or, you could replace it with a nice panaflo or other quiet fan. The PSU fan's noise mostly comes from the grate that goes over it. The fan is an 80mmas I recall.

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Speaking of...

low-frequency fan noise, my Compaq Presario(which is now my main computer til I get around to ordering and waiting 5 weeks for an iBook) sounds pretty normal when it's hard at work, but when the fan spins down it makes a surprisingly nice low-frequency, throbbing, almost burble-like noise which is so ...well, nice I almost wish it was louder. I'm gonna go in there and find out what brand/model it is coz I want these fans in ALL my computers. Acute

(PS- yes, a PC with only one 8cm fan. But it only ever blows out stone-cold air so it's OK.)

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let us know

let us know. NMB makes some really quiet fans too.

Jon
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I've had a couple machines th

I've had a couple machines that I modded the fan grate to reduce noise. They were typically the stamped metal cutout power supply grates. Just disassmble to bare metal and take a dremel to cut out the rest of what is inside the hole. Be careful and clean up any filings, and don't do the dremeling any where near anything electronic. Filings = very bad for circuit boards... The I like to leave it bare if nobody or no wiring will come near the fan. If needed stick on a wire grate. Better airflow, less noise, less dust build up, and easier to clean dust off when it does.

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