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jamesdmc

macrumors 6502
Original poster
I've got two hard drives mounted in the lower optical bay of my 2008 mac pro. I have a 4-pin molex to two 15-pin SATA cable. Looks like this. My mac pro is open with the optical bay out and the two new SATA hard drives mounted with an OWC multimount. The 4 hard drive bays have been removed. I can see the ODD_SATA connectors on the logic board (and I have two SATA cables ready to attach), but where on the logic board do I connect the 4-pin molex connector to get power to the optical bay drives? I think I'm missing an adapter. Am I?

Thanks.

James
 
molex

If it's an '08 MP, you should see a molex connector in-line, meant to be used if a 2nd optical drive was installed in the lower optical drive bay, on the same cable that powers the top optical drive.

That's what I used, putting 2 ssd's in the empty bay, along with the spare sata ports on the mother board.
 
RP, thank you.

I'm a complete moron. Once I removed the optical bay drive cage, I tucked the PATA cable back inside the cavity so that I could see the guts of the logic board and..well...just didn't notice that second power connector. Feeling pretty stupid right now. I mean, I have the fan assembly pulled out and everything 😀.

Thanks again. I can complete my SSD upgrade now.


James

Okay, I'm on a roll tonight. You have to remove the fan assembly to facilitate getting to the ODD_SATA connectors. Gonna log off now before I say something else stupid.
 
Last edited:
RP, thank you.

I'm a complete moron. Once I removed the optical bay drive cage, I tucked the PATA cable back inside the cavity so that I could see the guts of the logic board and..well...just didn't notice that second power connector. Feeling pretty stupid right now. I mean, I have the fan assembly pulled out and everything 😀.

Thanks again. I can complete my SSD upgrade now.


James

Okay, I'm on a roll tonight. You have to remove the fan assembly to facilitate getting to the ODD_SATA connectors. Gonna log off now before I say something else stupid.
Don't feel bad. Last year a local techie told me that the iMac screen is held to frame with magnets. So I was tugging away at it and cracked the screen. That was an over $600.00 mistake.
On subject. I just COMPLETELY REMOVED(unplugged) my original 1TB HDD, as well as an exterior 1TB Toshiba HDD I was using for Time Machine. Now my 2012 iMac 27" reboots in HALF the time. ONE MINUTE total. It took 2 minutes before. On the down side, I can't go BACK TO THE FUTURE in my Time Machine! 😛
 
Don't feel bad. Last year a local techie told me that the iMac screen is held to frame with magnets. So I was tugging away at it and cracked the screen. That was an over $600.00 mistake.
On subject. I just COMPLETELY REMOVED(unplugged) my original 1TB HDD, as well as an exterior 1TB Toshiba HDD I was using for Time Machine. Now my 2012 iMac 27" reboots in HALF the time. ONE MINUTE total. It took 2 minutes before. On the down side, I can't go BACK TO THE FUTURE in my Time Machine! 😛
I don't think he still feels bad 8 years later

😉
 
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I am here bc I want to connect two RGB RAM heatsinks to power somewhere. I was thinking of using the Optical bay spare molex plug, but somebody mentioned using the spare SATA bay connection, which is much closer to my RAM. Apparently the RGBs have 3 pin fan plugs on them. I want to get that done before my RGBs are shipped to me from China.
I installed a big graphics card, so I used 2 mobo connectors for that already.
 
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