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#1 2014-06-06 03:24:15

TheMacGuy
Member
From: SoCal
Registered: 2014-05-22
Posts: 47

G4 MDD ATX mod recommendations?

So I bought an MDD with a busted PSU knowing what I was going into. I have been looking, however I cannot find an ATX PSU with Molex anymore, they're all SATA. So I was wondering if anyone has recommendations as to which one I should use and possibly a model number? It would be greatly appreciated.

Thanks!


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#2 2014-06-06 03:27:45

bbraun
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Registered: 2014-05-29
Posts: 1,064
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Re: G4 MDD ATX mod recommendations?

I've generally been a fan of corsair and specifically the tx750.  It should have 8 molex connectors in addition to everything else.

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#3 2014-06-06 04:16:35

TheMacGuy
Member
From: SoCal
Registered: 2014-05-22
Posts: 47

Re: G4 MDD ATX mod recommendations?

I was hoping for something a little cheaper, but thats a good suggestion. Thank you! I will continue to look around.


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#4 2014-06-06 17:08:51

jt
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From: Bermuda Triangle, NC USA
Registered: 2014-05-21
Posts: 1,376

Re: G4 MDD ATX mod recommendations?

I've bought Good PSU G4s in QS'02 and DA configurations for parts machines. I spent $135 total eBay shipped for the former and picked up locally for the latter from craigslist.

The MDD'03 I got for a $100 shipped offer again from the QS seller because the QS'02 wasn't quite right for what I thought was a minor flaw. IIRC it turned out to be a boot drive OS incompatibility issue that was my fault. Great comms, great customer service and fabulous pricing on shipping included price offers, IMO.

Check 'em out, you may wind up spending less for a good OE-PSU/PartsBox than for a good quality ATX PSU if you wait a bit. wink

http://stores.ebay.com/TIN-CAN-INDUSTRI … id=9991235

You also free up your borked PSU for re-capping/whatever and have a toss-away parts/testing unit sitting there in which to store your deader until you get around to trying to fix it! Worked out great for me! big_smile

Last edited by jt (2014-06-06 17:16:59)

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#5 2014-06-06 18:48:26

uniserver
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From: Sf, Mi
Registered: 2014-05-15
Posts: 954
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Re: G4 MDD ATX mod recommendations?

this one looks like a winner ... http://www.newegg.com/Product/Product.a … -_-Product

17-822-007-32.jpg

Last edited by uniserver (2014-06-06 18:48:47)


#I Re-Cap √Mac √NeTX √Amiga Boards - A/B - PSU# (MacCaps.com)  Modern SCSI HD's - For Old Macs - Pre Cfg'd - 10k RPM! 73gb!! $50 + free shipping  -- Mac 128K Re-Ram kits (16 Chips) $35 + shipping, Floppy Issues?-> Bourns Filter Solution 128k - SE/30, $16 + shipping

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#6 2014-06-06 20:47:43

jt
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From: Bermuda Triangle, NC USA
Registered: 2014-05-21
Posts: 1,376

Re: G4 MDD ATX mod recommendations?

While we're at this, what seems to be the best 3.3V(?) Trickle PSU/Wall Warty for the Power-up circuit?

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#7 2014-06-06 20:51:38

uniserver
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From: Sf, Mi
Registered: 2014-05-15
Posts: 954
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Re: G4 MDD ATX mod recommendations?

wow that is a beast of a PSU.. though…   In the features they pretty much say all of what you want to hear smile
http://www.corsair.com/en-us/tx750w.html


60 AMPS on the 12 volt rail…  are you kidding me… that is insane!!!!!!!!!!!!!!!!!!      You could start a small car with that son of a bitch.
( kidding ) but that is alot of juice! on the +12v (Dedicated Rail) √ - selling feature smile

this proves 230vac is more Efficient.

tx750w_efficiency.jpg

Last edited by uniserver (2014-06-07 04:47:25)


#I Re-Cap √Mac √NeTX √Amiga Boards - A/B - PSU# (MacCaps.com)  Modern SCSI HD's - For Old Macs - Pre Cfg'd - 10k RPM! 73gb!! $50 + free shipping  -- Mac 128K Re-Ram kits (16 Chips) $35 + shipping, Floppy Issues?-> Bourns Filter Solution 128k - SE/30, $16 + shipping

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#8 2014-06-06 22:45:48

LCGuy
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From: Sydney, Australia
Registered: 2014-05-13
Posts: 805

Re: G4 MDD ATX mod recommendations?

Another vote for Corsair. Have a CX430M in my desktop PC, and a CX600M in my server. Solid as a rock.

Either way, don't cheap out on your PSU. While a cheap and crappy PSU will be fine for your old Celeron or P4 or whatever, for a machine that you care about (such as an MDD) I'd spend a bit more and get something decent. Even so, the Corsair CX series aren't that expensive anyway.

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#9 2014-06-07 05:53:24

uniserver
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From: Sf, Mi
Registered: 2014-05-15
Posts: 954
Website

Re: G4 MDD ATX mod recommendations?

yeah i have been building and selling machines for over 16 years... I have used all kinds of PSU's out there.

My favorites are the ones that are the Cheapest. Or the cases that are 25 bucks and included the PSU.

There are lots of guys out there... I call them PSU natzi's smile

They tell you how important a PSU is.. and how you don't want to skimp.
( witch is true )  Kinda...

What kind of shit do you think they put in OEM's?
Dell - HP/Compaq  or (Emachines/Acer/Gateway)--- All (foxconn) china owned now.

It sure isn't anything extravagant.

Same thing goes for Volvo guys... or Chevy guys... or ...  What ever  " X " buys is the best... smile
- kinda like human nature to say what ever you buy is the best..

My brother use to swear up and down about how Terrible Chrysler products are.
I mean would go on and on about how much he hates this rusty throw away trash.

Now he works for Chrysler...  Bought a new Dodge Diesel truck...   and now they are the best thing since swiss cheese...
Even though Ford Won the Extreme Diesel 4x4 challenge 3 years in a row... and all the dodge trucks had issues... lol 

anyways. Lets talk about PSU failures...

Guys that go on and on about how a cheap PSU could go bad and blow up your computer...
Basically Burning down the house... And killing your kitten in the process.

- What happens when you put a lesser PSU into your machine?
Well this all depends on what is in your machine?! 

If you have a machine that has 5 hard drives...   in a Raid...

2 video cards...  Xeon... or dual cpu...

Yeah you want to probably get a named brand higher output PSU.
Antec / Corsair...  and maybe pay attention to the Reviews on newegg as well because even these named branded guys are not perfect.
600watt+

Even a i3 i5 i7,  /w a midline graphics card...    your typical 350 watt will work fine.
The most common failure with these cheaper PSU's is the Brass Bushing cooling Fan.
But it starts making a racket when it starts to go, giving you all kinds of warning before it stops.
just change it... heck.. maybe even throw one of those 3 dollar Multi color led ones in there... -- just for fun.

So lets say you decide your gong to upgrade the video card in your i5 /w 8gigs of ram... 1TB hd.. etc
To maybe one of the higher end Amperage Gulping models (Nvidia - AMD/ATI)...

If you are drawing too much from a cheap PSU it just shuts off.   LOL example...     You fire up lets say world of warcraft.  Everything is fine.
then once you log in and it starts to draw the world in 1080p or greater... and massive rendering kicks in and motion is all over the screen...  and Pop the computer reboots...

Then yeah i would say, time to spend a few more dollars and get that 350watt outta there  and maybe slide in a nice $19.99 500watt cooler master or soemthing. -- Something that has some reasonable reviews of corse... or not.

http://support.apple.com/kb/TA23546?viewlocale=en_US
you can see right here what the MDD draws down as far as IDLE and MAX wattage.

Even the most mighty MDD here.

Power Mac G4 (Mirrored Drive Doors)
Dual 1.25GHz PowerPC G4
Power Consumption    Thermal Output
Idle            CPU Max
150 W    400 W

"CPU Max" is defined as running a compute-intensive test application that maximizes processor usage and therefore power consumption.

I mean what are the chances of you running your Vintage MDD at Max anyways?
I am sure that is really that last thing that vintage CPU/CPU Card/MB  and all those aged caps
need is to be ran at max... When your mac book air could probably run what ever task 4000 times faster and not even
break a utilization of more then 11%

But if you want to be on the safe side with your MDD...  I think a 19.99 500watt cooler master, with a large, high cfm, ball bearing fan
would do the trick with out any worry what so ever.

I sure it will preform, with a thermal recovery 3 to 4 times that of the stock apple (foxconn) PSU you are replacing.

my 2 favorite cases were these

DSCF1329.JPG
DSCF1635.JPG


Over about 2 years i built around 65 machines.
They were all Core2duo,  4 gig ram,  500 or 1TB hd, Onboard or 8600GT or GTS 250 (green) Graphics... DVD Super Multi....

Ran from the included 350watt psu, With hardly any issues...

Only One time did i have a total PSU failure.   And that was Lightning...
That " Cheap " 350 watt PSU took 100% of the hit and saved the entire rest of the machine!

There was a few customers (3)  that after about 1 - 1.5 years the PSU fan bearing started to get noisy... I changed their fans free of charge.

I am pretty sure the whole reason though (premature psu fan fail) was just because they(customer) were filthy as hell and never blasted out their DUST bucket computers. 

Amazing how NASTY ASS a computer can get just after 12 months in a Filthy house...   I had one computer come back that completely died after just 1 year.

IT HAD CAT PISS ALL OVER THE MAINBOARD>...     like the cat literally pressed its ass against the cpu vent and let it rip all over the main board.
and even that machine... washed the main board and blasted the fir balls out of the psu and it was running like new again.

Cat-CatInsideComputerHiIVoidedYourW.jpg

Last edited by uniserver (2014-06-07 06:30:56)


#I Re-Cap √Mac √NeTX √Amiga Boards - A/B - PSU# (MacCaps.com)  Modern SCSI HD's - For Old Macs - Pre Cfg'd - 10k RPM! 73gb!! $50 + free shipping  -- Mac 128K Re-Ram kits (16 Chips) $35 + shipping, Floppy Issues?-> Bourns Filter Solution 128k - SE/30, $16 + shipping

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#10 2014-06-07 09:03:49

TheMacGuy
Member
From: SoCal
Registered: 2014-05-22
Posts: 47

Re: G4 MDD ATX mod recommendations?

I've decided to go with uniserver's recommendation. Couple that with an ATX extension and I should be set. I have the pin outs ready to go and it all looks pretty simple. Thanks everyone!


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"Good guys always prevail"

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#11 2014-06-07 15:05:17

jt
Member
From: Bermuda Triangle, NC USA
Registered: 2014-05-21
Posts: 1,376

Re: G4 MDD ATX mod recommendations?

There was a European comrade who designs power supplies IRL who explained why a really high quality PSU with a lower (but sufficient) output rating can be better than an inexpensive PSU of a much higher output rating.

IIRC, he put the OEM Mac parts in the first category, dunno, MVW(ildly) in my experience.

Is the MDD in the class of ATX conversions requiring some voltage or other to be present at all times for startup?

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#12 2014-06-07 17:53:24

jt
Member
From: Bermuda Triangle, NC USA
Registered: 2014-05-21
Posts: 1,376

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#13 2014-06-07 18:17:44

ClassicHasClass
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From: Electron Alley
Registered: 2014-05-26
Posts: 1,081
Website

Re: G4 MDD ATX mod recommendations?

I mean what are the chances of you running your Vintage MDD at Max anyways?

If you're building Classilla? 100%.

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#14 2014-06-07 21:48:51

uniserver
Member
From: Sf, Mi
Registered: 2014-05-15
Posts: 954
Website

Re: G4 MDD ATX mod recommendations?

Lol. --- true

Last edited by uniserver (2014-06-07 23:59:49)


#I Re-Cap √Mac √NeTX √Amiga Boards - A/B - PSU# (MacCaps.com)  Modern SCSI HD's - For Old Macs - Pre Cfg'd - 10k RPM! 73gb!! $50 + free shipping  -- Mac 128K Re-Ram kits (16 Chips) $35 + shipping, Floppy Issues?-> Bourns Filter Solution 128k - SE/30, $16 + shipping

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#15 2014-06-08 01:32:38

techknight
Member
Registered: 2014-05-22
Posts: 449

Re: G4 MDD ATX mod recommendations?

I dunno, I have shitcanned alot of computers, mostly OEM garbage that the power supply failed with grossly out of regulation supply rails, blowing the mainboard with it.

But eh, On the flipside, I got a Xion generic piece of crap power supply in my Antec 900 case since 2007, been through a couple system upgrades and now with a Core I7 and it never failed. So i dunno.

Last edited by techknight (2014-06-08 01:34:23)

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#16 2014-06-08 01:50:36

jt
Member
From: Bermuda Triangle, NC USA
Registered: 2014-05-21
Posts: 1,376

Re: G4 MDD ATX mod recommendations?

Dunno, whenever an Apple PSU has crapped out, even the one that caught fire in my IIsi, I just pulled it, popped in an OEM part and was off and running, no damages apparent. I'll be testing that again with the the beloved, but DOA DA/466 soon. The DA667, a Blueberry iMac KBD & Mouse cost me $35 and gas for a fairly local (20mi. round trip side trip) craigslist pickup.

Are you fixing up an MDD/FW400 for OS9/Dual Boot or have you got the OS9 hostile FW800 variant?

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