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Pat, Mac Enthusiast
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Experience:  10 years of systems administration experience in mixed Mac and Windows environments
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I have a mac pro and want to add a PCI Express 5 port USB card

Resolved Question:

I have a mac pro and want to add a PCI Express 5 port USB card to it. The card requires power and has a four pin power connector. Is there a spare power connector on the power supply and how do I find it?

Thanks,
Jim
Submitted: 4 years ago.
Category: Mac
Expert:  Pat replied 4 years ago.
You've got 2 choices, the first one is probably the easiest:

Choice 1:
Power is available in the SATA drive bays where you put in extra hard drives. These are the numbered bays at the top of the case right above where the motherboard is. You'll need an adapter like this:

http://www.microcenter.com/single_product_results.phtml?product_id=0281713

These might be hard to get into place, take a look at the case and see if you think you'd be able to get the power connector into place, it won't be easy.

On a related note, there is a molex power connector in the drive bay where the Superdrive is located. However, I'm not aware of an easy way to route the cable back into the rest of the case.



Choice 2:
There are power connectors on the motherboard at the top left of the board. They are black plastic. Here is a picture of them, the black cables you see in this picture are connected into the board. Its hard to see in the picture but should give you a general idea. Use a flashlight to see them:

graphic


This one requires a bit of engineering and 2 cables. You need this one:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=280379071263

and you need this one:

http://www.newegg.com/Product/Product.aspx?Item=N82E16812706006

you'll have to cut one of the connectors off of the second cable and attach a 4-pin Molex Female connector onto it. Sorry that there's no easy answer, Apple should really have some Molex connectors in this part of the case, but they don't.
Pat, Mac Enthusiast
Category: Mac
Satisfied Customers: 171
Experience: 10 years of systems administration experience in mixed Mac and Windows environments
Pat and 3 other Mac Specialists are ready to help you
Expert:  Pat replied 4 years ago.
I'm not aware of a card that doesn't need a power conneciton, but its possible that this card will work without it, you just might run out of amps connecting devices that are powered by the USB bus. If you stick to connecting things that have their own power supplies (like hard drives that have an external power adapter) then the card will probably work. If you need someone to make the cable for you, let me know. I might be able to find a source and have them put it on ebay.

Edited by Pat on 2/6/2010 at 10:19 PM EST
Customer: replied 4 years ago.
Thank you, XXXXX XXXXX been very helpful.

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