Mac Pro max GPU power consumption limit?

Hey guys,
What's the max power consumption limit for the Mac Pro's 2 GPU Mini PCl-e power slots? I have to know because I have to decide which GPU I plan on buying. I'd be thankful if someone helped me with this.
Oh and it's a Mid-2012 12-core Mac Pro.
Cheers!

you might want to look at www.barefeats.com and then probably limit to Mac edition cards. Budget and what you hope to achieve. And whether you want it mostly for games in Windows and w/o boot screen or even willing to add a 2nd PSU just for power and 2 x 8-pin plus 2 x 6-pin power.
EVGA Mac Edition GTX 680 is two 6-pin and $580 area.
AMD has Mac Edition 7950
You will actually find more about unsupported cards and their use on MacRumors. And you do need 10.8.3+ for most anything beyond Apple's ATI 5x70.
I don't think looking at power usage is where I would have started my search.

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Disk drive connector (AMP MATE-N-LOK 1-480424-0 Power Connector)
AMP MATE-N-LOK 1-480424-0 Power connector (female pins)
Type
Electrical power connector
Production history
Manufacturer
AMP
Produced
1963
General specifications
Width
21 mm (female), 23 mm (male)
Height
6 mm (female), 8 mm (male)
Pins
4
Electrical
Signal
Yes
Max. voltage
12 V
Max. current
11 A/pin (30 °C rise)
Pin out
Male Pins (Female Connector)
Pin
Color
Type
Pin 1
Yellow
+12 V
Pin 2
Black
Ground
Pin 3
Black
Ground
Pin 4
Red
+5 V
18 AWG wire is typically used.
The desktop computer hard-drive connector is pictured here. It has 4 conductors, with the standard pinout as follows:
Pin #
Color
Function
1
Yellow
+12 V
2
Black
Ground
3
Black
Ground
4
Red
+5 V
SOURCE:
images and text from wikipedia.org

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Mac Pro max GPU power consumption limit?

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