I'm pretty much in the same boat as you, and I decided to just go for the EVGA Powerlink. Seems to be the easiest, safest and cheapest option.
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MP 1,1-5,1 NVidia GTX 780 (6GB) Power Draw Shuts Down MP 5,1
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OK @MIKX I am taking all of your advice except for moving the drives to the DVI cage. Here's the plan:
Dual mini 6pin to 8pin connected to the logic board
Dual SATA Power to 6pin (8in) connected to the two SATA connections in the DVI cage + 10in 6pin to 6pin extension (in case I need it for length) connected to the 6pin
EVGA Powerlink
If that doesn't do it I'm not sure what will
Thank you again for all your help and advice.
Dual mini 6pin to 8pin connected to the logic board
Dual SATA Power to 6pin (8in) connected to the two SATA connections in the DVI cage + 10in 6pin to 6pin extension (in case I need it for length) connected to the 6pin
EVGA Powerlink
If that doesn't do it I'm not sure what will
Thank you again for all your help and advice.
Well, everything arrived today and it was very disappointing.
1. The Powerlink has two 8pin connections (not a 6pin and an 8pin) when connecting the power cables. Sure, you can change out the 8pin to a 6pin to connect it to the video card, but you still need two 8pin connections to provide the power.
2. The internal SATA connections are the extended power/data SATA connections and the Y cable that I was told to order does not work with these types of connections. Plus, that Y cable is dual SATA power (only) to 6pin not 8pin which is what is required with the Powerlink.
3. While moving a drive or two up to the DVI cage was mentioned, no reason was ever given as to why that is an absolute necessity. For anyone reading this, it is necessary to free up bays 2/3 from connected hard drives so you have SATA connections on the logic board to use to power the video card. Otherwise, there is no way to route the cable and put the Mac Pro chassis side panel on.
So, if you have a Mac Pro 4,1 or 5,1 here's what you need:
OWC Drive Mount Adapter (only required if you have more than 3 hard drives in the sled bays)
eshop.macsales.com
EVGA Powerlink
8pin to Dual Mini-6pin Cable (this connects to the EVGA PowerLink)
Dual SATA 15pin (male) to 8pin
SATA 22pin to SATA 15pin and 7pin Breakout Cable (qty 2)
Here's how it works:
1. Relocate your hard drive(s) to the DVI cage if necessary
2. Connect the Powerlink to your video card
3. Connect the dual mini-6pin to the logic board A/B connections and the 8pin to port 1 of the Powerlink
4. Connect both of the SATA breakout cables to SATA ports 2/3 (the corresponding drive bay numbers)
5. Connect the Dual SATA to the 15pin female ports of the breakout cable and the 8pin to port 2 of the Powerlink
That's it!
1. The Powerlink has two 8pin connections (not a 6pin and an 8pin) when connecting the power cables. Sure, you can change out the 8pin to a 6pin to connect it to the video card, but you still need two 8pin connections to provide the power.
2. The internal SATA connections are the extended power/data SATA connections and the Y cable that I was told to order does not work with these types of connections. Plus, that Y cable is dual SATA power (only) to 6pin not 8pin which is what is required with the Powerlink.
3. While moving a drive or two up to the DVI cage was mentioned, no reason was ever given as to why that is an absolute necessity. For anyone reading this, it is necessary to free up bays 2/3 from connected hard drives so you have SATA connections on the logic board to use to power the video card. Otherwise, there is no way to route the cable and put the Mac Pro chassis side panel on.
So, if you have a Mac Pro 4,1 or 5,1 here's what you need:
OWC Drive Mount Adapter (only required if you have more than 3 hard drives in the sled bays)
OWC Multi-Mount for 2009-2012 Mac Pro
Add more storage to your 2009-2012 Mac Pro by utilizing the spare optical drive bay with a 5.25" hard drive.
EVGA Powerlink
EVGA PowerLink, Support All NVIDIA Founders Edition & All EVGA GeForce RTX 2080 Ti/2080/2070*/2060*/Super*/GTX 1660 Ti*/1660*/1650/1080 Ti/1080/1070 Ti/1070/1060 0600-Pl-2816-Lr
The EVGA powerlink is designed to provide both a more stable power source and reduce ripple and noise, compared to connecting your power supply directly to the graphics card. The EVGA powerlink has another function: to make your PC look even more awesome. This adapter allows you to reroute the po...
www.amazon.com
8pin to Dual Mini-6pin Cable (this connects to the EVGA PowerLink)
COMeap Dual Mini 6 Pin to 8 Pin PCI Express Video Card Power Adapter Cable for Mac Pro Tower/Power Mac G5 15-inch(38cm)
COMeap Dual Mini 6 Pin to 8 Pin PCI Express Video Card Power Adapter Cable for Mac Pro Tower/Power Mac G5 15-inch(38cm)
www.amazon.com
Dual SATA 15pin (male) to 8pin
J&D 8 Pin to SATA Power Cable, (2 Pack) 2X SATA to 8 Pin PCI Express (PCIe) Graphic Video Card Power Cable Adapter, 8 inch
J&D 8 Pin to SATA Power Cable, (2 Pack) 2X SATA to 8 Pin PCI Express (PCIe) Graphic Video Card Power Cable Adapter, 8 inch
www.amazon.com
SATA 22pin to SATA 15pin and 7pin Breakout Cable (qty 2)
SATA 22 Pin Male to SATA 7 Pin and 15 Pin Female
SATA 22 Pin Male to SATA 7 Pin and 15 Pin Female
www.amazon.com
Here's how it works:
1. Relocate your hard drive(s) to the DVI cage if necessary
2. Connect the Powerlink to your video card
3. Connect the dual mini-6pin to the logic board A/B connections and the 8pin to port 1 of the Powerlink
4. Connect both of the SATA breakout cables to SATA ports 2/3 (the corresponding drive bay numbers)
5. Connect the Dual SATA to the 15pin female ports of the breakout cable and the 8pin to port 2 of the Powerlink
That's it!
As an Amazon Associate, MacRumors earns a commission from qualifying purchases made through links in this post.
You can use 2 miniPCIe 6-pin to 6-pin with Powerlink, no problem. Internally all +12V are bridged.Well, everything arrived today and it was very disappointing.
1. The Powerlink has two 8pin connections (not a 6pin and an 8pin) when connecting the power cables. Sure, you can change out the 8pin to a 6pin to connect it to the video card, but you still need two 8pin connections to provide the power.
2. The internal SATA connections are the extended power/data SATA connections and the Y cable that I was told to order does not work with these types of connections. Plus, that Y cable is dual SATA power (only) to 6pin not 8pin which is what is required with the Powerlink.
3. While moving a drive or two up to the DVI cage was mentioned, no reason was ever given as to why that is an absolute necessity. For anyone reading this, it is necessary to free up bays 2/3 from connected hard drives so you have SATA connections on the logic board to use to power the video card. Otherwise, there is no way to route the cable and put the Mac Pro chassis side panel on.
So, if you have a Mac Pro 4,1 or 5,1 here's what you need:
OWC Drive Mount Adapter (only required if you have more than 3 hard drives in the sled bays)
OWC Multi-Mount for 2009-2012 Mac Pro
Add more storage to your 2009-2012 Mac Pro by utilizing the spare optical drive bay with a 5.25" hard drive.
EVGA Powerlink
EVGA PowerLink, Support All NVIDIA Founders Edition & All EVGA GeForce RTX 2080 Ti/2080/2070*/2060*/Super*/GTX 1660 Ti*/1660*/1650/1080 Ti/1080/1070 Ti/1070/1060 0600-Pl-2816-Lr
The EVGA powerlink is designed to provide both a more stable power source and reduce ripple and noise, compared to connecting your power supply directly to the graphics card. The EVGA powerlink has another function: to make your PC look even more awesome. This adapter allows you to reroute the po...www.amazon.com
8pin to Dual Mini-6pin Cable (this connects to the EVGA PowerLink)
COMeap Dual Mini 6 Pin to 8 Pin PCI Express Video Card Power Adapter Cable for Mac Pro Tower/Power Mac G5 15-inch(38cm)
COMeap Dual Mini 6 Pin to 8 Pin PCI Express Video Card Power Adapter Cable for Mac Pro Tower/Power Mac G5 15-inch(38cm)www.amazon.com
Dual SATA 15pin (male) to 8pin
J&D 8 Pin to SATA Power Cable, (2 Pack) 2X SATA to 8 Pin PCI Express (PCIe) Graphic Video Card Power Cable Adapter, 8 inch
J&D 8 Pin to SATA Power Cable, (2 Pack) 2X SATA to 8 Pin PCI Express (PCIe) Graphic Video Card Power Cable Adapter, 8 inchwww.amazon.com
SATA 22pin to SATA 15pin and 7pin Breakout Cable (qty 2)
SATA 22 Pin Male to SATA 7 Pin and 15 Pin Female
SATA 22 Pin Male to SATA 7 Pin and 15 Pin Femalewww.amazon.com
Here's how it works:
1. Relocate your hard drive(s) to the DVI cage if necessary
2. Connect the Powerlink to your video card
3. Connect the dual mini-6pin to the logic board A/B connections and the 8pin to port 1 of the Powerlink
4. Connect both of the SATA breakout cables to SATA ports 2/3 (the corresponding drive bay numbers)
5. Connect the Dual SATA to the 15pin female ports of the breakout cable and the 8pin to port 2 of the Powerlink
That's it!
If you had to do all this for your GPU to work, maybe you have power problems with your GPU or your Mac Pro PSU.
I successfully used other 250W GPUs like 1080 TI and VEGA56 with just Powerlink and 2 miniPCIe 6-pin to 6-pin cables. Other people reports the same.
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Please read the entire thread to see what is currently working and why I needed to do this.
As a follow up to this thread, all of the components I mentioned above finally arrived today. I got it all installed and it works perfectly. We pushed Twinmotion to its limits and there were no shutdowns. In fact, the NVidia GTX 780 was noticeably quieter even when running with the Ultra settings across the board. I highly recommend the solution I posted above to ensure you get all of the power available to you with an upgraded video card such as this.
Good luck!
Good luck!