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I purchased a Nvidia GTX 680 video card for my 4,1 Mac Pro. On the card there are 6-pin and 8-pin ports. I am confused as to exactly what sort of power cables to purchase. Am I to buy a 6-pin PCI-E to male molex and 8-pin PCI-E to male molex cables?
The best solution might be an external power supply.
 
Thanks for helping Orph.
I don't know what the card natively takes but I read in this thread of people stuffing 6 pin cables into 8 pin sockets. Is that feasible or stupid?

Is there another card that is known to just work without needing to buy anything extra?

GTX 960 has two 6-pin ports. You just need two 6-pin Mac cables like these. If your existing card has 1 or 2 cables already, you can reuse those.
 
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Does anyone know if installing the Safari 10.0 update for El Cap breaks the web drivers (i.e. changes the build number)?
 
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Web Driver 367.15.10.05f01 for macOS Sierra
available g-sync option!
 

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Does anyone know if installing the Safari 10.0 update for El Cap breaks the web drivers (i.e. changes the build number)?
No change in build number. I successfully updated my Mac Pros that have a GTX 970/960/950/750 cards by just doing the normal update from the App Store.
 
Thanks lowendlinux.

So it looks to be the same as this one from my local PC vendor which doesn't have the word "Mac" in its title.
http://cplonline.com.au/silverstone...ed-power-cable-extansion-sst-pp07-ide6br.html

The picture is not very clear but it's described as a "1 x 6pin to PCI-E 6pin connector."
I've got other local "PC" options that have those same two different sized 6 pin ends.

No, that does not look correct to me at all. It looks like normal size 6-pin male to normal size 6-pin female, which is an extension cable.

You need a cable with 6-pin male connectors on both ends. One connector is smaller than the other, but they are both male 6-pin connectors. This is not a typical cable in the PC world, so I will be surprised if you find a pair stocked in a local PC shop.

The reason why I linked to the specific seller that I did is because he ships internationally. So if you cannot find the correct cable locally, you can always fall back to the seller I linked.
 
I have installed a Gigabyte GTX 750 TI (self-powered through PCI-e slot) on a Mac Pro 1.1 running 10.11.6. I have got mixed result. It is very strange. I manage to have the card recognized with the latest web driver. However, when I shut down the Mac and leave it for 1 night, for example, then it is impossible to have this graphic card working or recognized. No DVI output. I can only navigate in the Mac Pro through a Screen Sharing.
How to explain this lunatic behaviour ?

Edit: the 750 TI is working like a charm in a 2010 Mac Pro under Yosemite. Why does it have such problem into a Mac Pro 1.1
 
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I have a Mac Pro 3.1 running 10.10.5. I have a non-flashed GTX 770 4 GB card that I would like to use in this box, but the machine will not boot with this card installed. I get the chimes and then nothing. The machine works fine with a GTX 470 (which also uses two power cables). I have both power cables plugged in, I installed the latest nvidia drivers and I have tried slots 1 and 2. Any suggestions about how to get this card to work? Thanks.
 
I have a Mac Pro 3.1 running 10.10.5. I have a non-flashed GTX 770 4 GB card that I would like to use in this box, but the machine will not boot with this card installed. I get the chimes and then nothing. The machine works fine with a GTX 470 (which also uses two power cables). I have both power cables plugged in, I installed the latest nvidia drivers and I have tried slots 1 and 2. Any suggestions about how to get this card to work? Thanks.

Are all 6-Pin and 8 pin connected? This is not optional.

Only with the MVC-Version of the GTX 770 you can use a 6 pin cable in the 8 pin connector.
 
Are all 6-Pin and 8 pin connected? This is not optional.

Only with the MVC-Version of the GTX 770 you can use a 6 pin cable in the 8 pin connector.

I have two power cables connected from the mobo to the card. One is 6-pin to 6-pin and the other is 6-pin to 8-pin. If I'm not mistaken the two power connectors on the mobo are both 6-pin. Am I wrong about that?
 
How can I tell if the card is getting enough power? I can see that the fans are spinning, but all that means is that the card is getting enough power to spin the fans.
 
You need a cable with 6-pin male connectors on both ends. One connector is smaller than the other, but they are both male 6-pin connectors. This is not a typical cable in the PC world, so I will be surprised if you find a pair stocked in a local PC shop.

Thanks for the continued help.

I'm struggling with the male/female thing here. (Yes I'm an adult!)
This card has one socket for power which appears to have pins in it: http://www.scorptec.com.au/product/Graphics_Cards/NVIDIA/60422-GV-N950WF2OC-2GD
Which makes me think it requires a female connection.

I can import the cable from Hong Kong based ebay vendors pretty cheap but it takes a long time. Surely I can find it in Australia somewhere!!
 
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Thanks for the continued help.

I'm struggling with the male/female thing here. (Yes I'm an adult!)
This card has one socket for power which appears to have pins in it: http://www.scorptec.com.au/product/Graphics_Cards/NVIDIA/60422-GV-N950WF2OC-2GD
Which makes me think it requires a female connection.

I can import the cable from Hong Kong based ebay vendors pretty cheap but it takes a long time. Surely I can find it in Australia somewhere!!

Cable gender is determined by the connector shape, not by the metallic pins in the connector.

Male connectors have protruding plugs. Female connectors have sockets that the male plugs go into.

The GPU has female connectors. The motherboard has female mini connectors. So each cable has to have a mini male connector on one end, and standard male connector on the other end.

This is a non standard cable used only by old Mac models that haven't been sold for years. I will be very surprised if you find the cables in stock locally, but your best bet would be a Mac repair shop.

The link I provided is the correct cable, ships internationally, and offers Priority Mail International 5-10 day.
 
I have installed a Gigabyte GTX 750 TI (self-powered through PCI-e slot) on a Mac Pro 1.1 running 10.11.6. I have got mixed result. It is very strange. I manage to have the card recognized with the latest web driver. However, when I shut down the Mac and leave it for 1 night, for example, then it is impossible to have this graphic card working or recognized. No DVI output. I can only navigate in the Mac Pro through a Screen Sharing.
How to explain this lunatic behaviour ?

Edit: the 750 TI is working like a charm in a 2010 Mac Pro under Yosemite. Why does it have such problem into a Mac Pro 1.1

I am sorry to insist. But does anybody manage to get a GTX 750 TI working in a Mac Pro 1.1 ? Any idea why it is sometimes recognized and sometimes not?
 
Perhaps the CMOS battery is dead

I changed the CMOS battery (even it wasn't dead). To have the card recognized, it seems I need to do a SMC reset. And with some luck the GTX is recognized. Furthermore it seems I have more luck when the Extension Utility is set on x8 for a given PCI-E slot.
 
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