Dual 6pin to 8pin vs. single 6pin to 6+2pin: Difference?

[LeMonarque]

I want to pick up NZXT's white sleeved 6pin to 6+2pin power connector to snazz up my incoming build, and I just realized that the graphics card I ordered comes with a dual 6pin to 8pin power connector.

My question is: is there any difference between a 6pin to 6+2pin GPU cable and a dual 6pin to 8pin GPU cable? Does the dual 6pin to 8pin provide any power benefits or overclocking benefits over the single 6pin to 6+2pin?

NZXT White Sleeved 6pin>6+2pin power connector:
http://www.amazon.com/dp/B003TSCZSA

EVGA GTX 770 included dual 6pin>8pin power connector:
http://www.evga.com/products/images/gallery/02G-P4-2774-KR_XL_3.jpg

 

[geofelt]

What psu do you now have? If it does not have sufficient quality power like the 600w or so that a GTX770 needs, , then you should not be using 6 to 8 pin adapters at all, and the psu needs to be replaced.

Functionally, either adapter will do the job.

 

[jnkweaver]

The 6-pin is made to supply and extra 75W to the card while the 8-pin is made to supply 150W to the card. The dual 6-pin to 8-pin makes more sense electrically.

 

[Eximo]

http://www.tomshardware.com/reviews/power-supply-specifications-atx-reference,3061-12.html

Using two six pin connectors to get down to a single 8 pin means you are providing more then the maximum required through an 8pin, this is a good thing. Using a single 6pin to 8pin adapter means you are wiring it to work electrically, but may not be capable of delivering the required power through the provided wires.

Now there is a lot of fudge factor built in for the less scrupulous suppliers who will save money by using wires that are smaller. Unless you are doing heavy overclocking a 6 to 8 pin adapter is probably fine. Though to get the most power you should use the dual 6 pin to 8 pin adapter.

 

[LeMonarque]

What psu do you now have? If it does not have sufficient quality power like the 600w or so that a GTX770 needs, , then you should not be using 6 to 8 pin adapters at all, and the psu needs to be replaced.

Functionally, either adapter will do the job.

I'm getting the Corsair AX760.

http://www.tomshardware.com/reviews/power-supply-specifications-atx-reference,3061-12.html

Using two six pin connectors to get down to a single 8 pin means you are providing more then the maximum required through an 8pin, this is a good thing. Using a single 6pin to 8pin adapter means you are wiring it to work electrically, but may not be capable of delivering the required power through the provided wires.

Now there is a lot of fudge factor built in for the less scrupulous suppliers who will save money by using wires that are smaller. Unless you are doing heavy overclocking a 6 to 8 pin adapter is probably fine. Though to get the most power you should use the dual 6 pin to 8 pin adapter.

Thanks for the clarification! I want to get the most out of my build that I can, so I think I'm going to stick with a dual 6pin to 8pin adapter. However, I'd still like to get a white-sleeved one if possible, and those are...well, they're hard to find apparently! Do you know of any that make them?

Another option is to just leave the stock 8pin adapter and get a 6pin sleeved cable extension to stick onto the dual molex to 6pin adapter.

All white or black-white twisty contrast-ness...hmm

 

[jnkweaver]

The Corsair AX760 has 6x 6+2pins so no adaptor is necessary.

 

[geofelt]

The Corsair AX760 has 6x 6+2pins so no adaptor is necessary.

True. The corsair 760 is a fine psu, but is probably overkill unless you are planning on sli GTX770 cards.

 

[LeMonarque]

The Corsair AX760 has 6x 6+2pins so no adaptor is necessary.

Can I use just the 6 pins from 2x6+2pins to connect to the dual 6pin to 8pin adapter (leaving the 2 pin connectors hanging free)? Or do I have to connect the extra 2pins?

 

[jnkweaver]

You don't need an adaptor.

The psu comes with six 6+2 pins.
The 6+2 pins are used as either 6 pins or 8 pins. The +2 part is powered to get the required 150W for an 8-pin. 0

If you need a 6 pin you leave the +2 unconnected. If you need an 8-pin you connect the +2.

The Corsair AX760 has enough connectors for 3 GPU's (if not enough wattage for all 3)

 

[jnkweaver]

Here is a site with nice pictures
http://www.playtool.com/pages/psuconnectors/connectors.html

 

[geofelt]

The Corsair AX760 has 6x 6+2pins so no adaptor is necessary.

Can I use just the 6 pins from 2x6+2pins to connect to the dual 6pin to 8pin adapter (leaving the 2 pin connectors hanging free)? Or do I have to connect the extra 2pins?

You are good. Just let the unused 2 pins dangle. That is exactly why the psu was designed with this flexibility.

 

[Julian Ant]

Hello. What about --> OCZ StealthXStream 2 Power Supply, 500W, 80 PLUS with ASUS GTX760-DC2OC
I have only one 6-pin PCI-E provided from PSu but Asus needs 8 (has cable modulator 8pin to 6pin)

4-pin CPU
6-pin PCI-E
4 x Peripheral (IDE)
1 x Floppy
3 x SATA

Do i need to change my Power Supply although it gives the required 500 Wat power ?