Hey! Just got my Evga Gtx 1080 FTW and I am currently installing it. I am a bit confused if I should use 2 separate 8 to 8+6 pin connectors from the power supply to the card or if I should use one 8 to 6+8 connector along with the adaptor that I got with the card. 

I got the message "Power system down and connect power to the graphics card." when I just used one 8 pin cable from Power Supply to Graphics Card.

Should I use two power cables from power supply to graphics card? Does it really need that much power?

I tried using just one "8 pin to 8+6 pin"-cable to the card where I used the converter on 6 pin to convert it to 8 pin and then connected both to the card and this worked when I started the computer. Using the same cable but not the converter and instead plugging in 6 pin into one of the 8 pin slots did not work. 

I have a EVGA 650 G2 power supply.

Thanks for all your help!

Yes, use two separate 6+2 pin connectors.

Don't use the supplied adaptors that come with the card. use the connectors that are on the PSU,
 
here is a tip, plug in the 2 pin connectors first, and make sure they are the right way around, (the smooth side touches the 6 pin connector) as the 6 pin connector will only go in 1 way.
 
Yeah, I'm a bit surprised that it needs 2x8 pins, considering the MSI gamer X needs 1x6 and 1x8 .

Awesome, thanks for that. Does it matter if I put the 8 pin in the graphics card or if I put the 6+2 in the graphics card? Any difference?

pellewisten
Awesome, thanks for that. Does it matter if I put the 8 pin in the graphics card or if I put the 6+2 in the graphics card? Any difference?

 
Welcome to the forums pellewisten
 
No, they both are fine to use  (edit misread the OP statement)  If one cable has 8 Pins on one side and 6+2 on the other side; the 8-pin goes into the PSU.
 
 
http://www.evga.com/Products/Product.aspx?pn=220-G2-0650-Y1
 

Welcome to the forums pellewisten! I'd like to clarify one thing Cool GTX said. I'd recommend using the 6+2 connector, as the other end is intended to plug into the power supply and the 2 ends are electrically different. 

EVGATech_BrandonS
Welcome to the forums pellewisten! I'd like to clarify one thing Cool GTX said. I'd recommend using the 6+2 connector, as the other end is intended to plug into the power supply and the 2 ends are electrically different. 

Fixed,
 
Thought he had two different cables, the first time I responded --- my bad

So in short i need to use two cables of the 8 to 6+2 pin to connect the GPU to PS? im using EVGA g2 850? i need clarification, i just got my FTW 1080 today and its my first time to build a PC. Thank you 

Cool GTX

pellewisten
Awesome, thanks for that. Does it matter if I put the 8 pin in the graphics card or if I put the 6+2 in the graphics card? Any difference?

 
Welcome to the forums pellewisten
 
No, they both are fine to use  (edit misread the OP statement)  If one cable has 8 Pins on one side and 6+2 on the other side; the 8-pin goes into the PSU.
 So in short i need to use two cables of the 8 to 6+2 pin to connect the GPU to PS? im using EVGA g2 850? i need clarification, i just got my FTW 1080 today and its my first time to build a PC. Thank you
 
 
 

Just plug in any 6+2 or 8-pin into the GPU. 6+2 = 8-pin
Only make sure you dont use the CPU 8-pin on the GPU.
It doesn't matter if you use a single "skein" from the PSU which contains two PCIe GPU plugs or two "skeins".

jimalbert01
So in short i need to use two cables of the 8 to 6+2 pin to connect the GPU to PS? im using EVGA g2 850? i need clarification, i just got my FTW 1080 today and its my first time to build a PC. Thank you 

This FTW --? 08G-P4-6286  EVGA GeForce GTX 1080 FTW GAMING ACX 3.0
 

 
Correct Two cables, one for each of the GPU's plugs is best.
 
You MUST populate all of the GPU power plugs - leave non-open
 
If one cable has 8 Pins on one side and 6+2 on the other side; the 8-pin goes into the PSU.