770GTX and 780GTX not (safely) possible on current Mac Pro

[rabidz7]

Looks like the top nVidia cards of this generation have a TDP above 225 watts, making them not suitable for Mac Pro use without external power supplies.

The 770 has a TDP of 230Watts and the 780 has a TDP of 250Watts.
Unfortunately the 770 is only 5Watts over the 225Watt limit.
The 780 has a TDP of 250Watts.

Source:

780:
http://videocardz.com/41631/nvidia-geforce-gtx-780-final-specifications

770:
http://videocardz.com/41646/nvidia-geforce-gtx-770-final-specifications

 

[Topper]

The 780 has a TDP of 250Watts.

That's right. 6 and 8 pin connections.
May 23rd, let the show begin.

 

[ElderBrE]

The 780 has a TDP of 250Watts.

That's right. 6 and 8 pin connections.
May 23rd, let the show begin.

So, yeah, guys, I se no problem running these on my current 1,1, I mean, I've been doing so for, like, you know, a while, and no issues, so it's safe, cool. *

* (Responsibility note: Just in case someone who jumps into this thread one or two years from now, that was a joke from the current times and you should not take advise from it)

 

[ashurao]

s…t ... I was hoping to change my 570 with a 780 or 770 for Octane render. I could not.
I'm tired of being blocked by the mac pro's power supply.

 

[Asgorath]

s…t ... I was hoping to change my 570 with a 780 or 770 for Octane render. I could not.
I'm tired of being blocked by the mac pro's power supply.

So, just get a 680? Or something like this?

 

[Wardenski]

I have retired from upgrading my Mac Pro, too much effort to use the latest GPUs.

I am tempted to put together a smallish PC for gaming later in the year, maybe a 790 when it comes out but there aren't many games that challenge my 5870 so its probably not worth it.

 

[ashurao]

So, just get a 680? Or something like this?

I wanted to install a 780 because there is not much difference in power (in octane render) between 680 and 570.
GK 110 has more power for GPGPU that GK 104

 

[lewdvig]

I have retired from upgrading my Mac Pro, too much effort to use the latest GPUs.

I am tempted to put together a smallish PC for gaming later in the year, maybe a 790 when it comes out but there aren't many games that challenge my 5870 so its probably not worth it.

Effort = turn off mac, open case, install card, connect power, close case, boot, install cuda driver.

Pretty easy IMO.

Early GTX 680 cards had 6+8 and then board makers came out with 6+6 designs.

IMO we will see the same thing with the 770.

And since the 770 is only a better clocked 680, I would save a few bucks and get a 680 cheap on CL.

 

[Inconsequential]

s…t ... I was hoping to change my 570 with a 780 or 770 for Octane render. I could not.
I'm tired of being blocked by the mac pro's power supply.

It's not the PSU, it's the lack of a 8-pin power trace.

Theoretically you could merge the 2x6 pins into a single large connector and then split it out into a 6 and 8-pin in order to share the added 8-pin load over both traces.