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Mounting PSU G5


chorscroft
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Do you still ahve the G5 PSU case? I have successfully adapted about 4 different powersupplies (80 and 120mm fan) to fit in that case, its a very close fit usually, sometimes the 80mm ones even just touch, but it is a fit. and preserves the stock PSU cooling aswell...

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No idea I'm afraid, mine both came from complete dead machines at work.

 

I also cut off the power switch and plug and soldered on the standard apple plug without a switch (always on).

 

I'll see if I can find pix from one of my builds.

 

Cam

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I've still got the piece of plastic casing for directing airflow which I don't need.

Can anyone come up with some clever way to use this as a divider?

 

Conor

 

What do you mean ? How do you want to use the divider, to separate what from what ?

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Im having similar problems with my G5 and ATX PSU.

 

The 2 things which consern me are electrocution and airflow!

 

I can get hold of a G5 PSU housing and dont mind putting my PSU in it but im just worried about grounding it properly.

 

The other problem is airflow, its a long way from the lower front grille to the actual PSU components if they are located near the back. What is an effective way to create a wind tunnel effect to cool it without using those noisy 40mm fans? I dont want a fan hole above it because it will ruin the aesthetics.

 

Any help would be great, thanks.

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I will try find my pics tonight, but basically the PC PSU sits in the middle of the mac PSU case, held down by one original screw, and sitting on plastic standoffs on the other 3 corners.

 

Grounding is not an issue, just do it the same way it was done in the original case, usually the only earth is from the IEC socket direct to the PSU case, leave the apple one in place.

 

I did use the original fans, theyre not that loud, you should use a fan controller to slow them to between 1400 and 1500rpm

 

Please also remember to cut off excess molex/sata power leads to reduce case clutter, and use the original apple drive-bay power lead.

 

I put a temperature probe in one of the PSU heatsinks just for good measure, and at 1380rpm I achieve 65*C at idle or 69*C while gaming, both these temperatures are well within spec for the components of the PSU, and around the same as you'd see with the psu in its original case.

 

Pics coming tonight.

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Power supply mounted in case, thats with most of the excess cables cut off

DSCF6264Small.jpg

 

Original fans still, ATX Power lead comes out the front middle port, P4 Power comes out the rear.

DSCF6261Small.jpg

 

Fan Power, Drive Power (Using original 8pin connector) and Fan-controller power come out the front port.

DSCF6263Small.jpg

 

Pics nicked from my mate's thread: http://www.gpforums.co.nz/thread/344670/?s=

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Thanks for the reply and the pics Wiretap, The clearance on the top of the PSU looks slightly dicey! Does it actually touch the top of the cover? I think my PSU routes the case grounding through the actual plug (3-pin here in the uk). I will have to check but if there is a ground wire to the case I will reattach it to the apple PSU case.

 

I was hoping to maybe use an 80mm fan mounted at an angle (to fit the height) to suck air in. Im just worried about heat lingering anywhere! Im will use a temp probe with alarm for sure! If those 40mm fans are quiet I may use them but its such an odd design on Apple's part. Wernt there alot of issues with the PSU's on the G5?

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The PSU clears the cover by 2-3mm if you use a 120mm-fan type psu. do not use an 80mm-fan type psu as these will contact the cover badly.

 

I still insulated the cover to prevent contact, though it should be fine as the heatsinks are grounded anyway.

 

The 50mm fans used are loud at full speed (6500rpm), but pretty quiet at the 1400 or so required to cool a PC powersupply.

 

Specified temperatures for the compents in a powersupply are -65 to 120*C, though I consider 80*C to be a high temp. My temperature probe is attached to the larger of the two heatsinks, and then thermal grease is applied to ensure a good temperature reading. if you do not have the sensor in good contact, the ambient temperature inside a normal PC PSU is 45*C, and this is what it should read at a maximum.

 

We have had one G5 die due to PSU failure here at work, but it is a lot less common than in the G4s.

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  • 2 weeks later...

Just wondering, is £10 ($14) too much to pay for the G5 PSU casing? Thats how much I can get one for and seeing as its a broken power supply and all im buying is a glorifed metal box is that about the right price to pay?

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Yeah I suppose a tenner isnt too bad, some guys on this forum got fully stocked cases (bits and all) for free! Just got to be lucky I guess. I dont want to try and fashion a metal PSU case myself because I doubt it would be safe!

 

Im still searching for a rear fan assembly bracket (with or without fans). I gave up on finding a dead mobo for the ports and just bought extender cables, im only missing FW800 and optical connectors now.

 

Just glad ive got the main case which is in good nick. Still got to solve the litter problem of having a full atx mobo, hahaha!

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Im still searching for a rear fan assembly bracket (with or without fans). I gave up on finding a dead mobo for the ports and just bought extender cables, im only missing FW800 and optical connectors now.

 

I have some extra dead mobo's for those who are interessed. PM if you need one.And I have a rear fan assembly bracket without fans too.

 

Others have successfully mounted PC PSU inside a G5 PU case or without and just cover by a plexi plate. I will look back for pix.

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Yeah I suppose a tenner isnt too bad, some guys on this forum got fully stocked cases (bits and all) for free! Just got to be lucky I guess. I dont want to try and fashion a metal PSU case myself because I doubt it would be safe!

 

Check here how Torque solved this problem :

 

powersupply.jpg

 

powersupply2.jpg

 

Yeah I suppose a tenner isnt too bad, some guys on this forum got fully stocked cases (bits and all) for free! Just got to be lucky I guess. I dont want to try and fashion a metal PSU case myself because I doubt it would be safe!

 

Im still searching for a rear fan assembly bracket (with or without fans).

 

Is that the one ? post-101875-1206059361.jpg

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