How to connect second gpu to available PSU slots.

[TaurXCI]

Hello

So I decided to go SLI with my 780ti cause thanks to the 980 release the prices of my current card went real low, so I ordered my second GPU and I am taking a look to my current rig to see if all is available for the upgrade. All is fine the only problem that I have is that I know not a lot about PSU molex adapters so I don't know how to connect the second (right) slot of my gpu cause it uses to 8 pins.

I have a silent pro gold 800w wich comes with:

(3) 6-pins one comes from the inside of the psu and the other 2 are labeled PCIE
(5) 5-pins which are labeled HDD/SATA/FLOPPY

My current 780 is connected from the direct (inside) 6 to 8 pin and the other one is from the labeled pcie ones

it only left 2 spots I am planning to connect a 6 to 6+2 pin to the left side but I dunno how to connect the second spot with that floppy slot

here is a picture of my PSU

I will appreciate any help, thanks.

 

[clutchc]

What is the model of that Cooler Master PSU? It doesn't look like it is capable of handling 2 x 250W cards.

 

[TaurXCI]

Silent pro gold 800w

 

[clutchc]

Silent pro gold 800w

Then I don't understand the problem. You should have enough 6+2 pin or 8 pin connectors for both cards, no?

 

[TaurXCI]

It have 3 slots of 6 pin which i already use 2 of them, i only (see image above) have a 6 pin slot left which i will use with a 6 to 6+2 for the first gpu slot but then if you see the image i only have left a 5 pin slot. How do i connect that to the gpu?

 

[clutchc]

I would say that your PSU is not intended for providing 600W on the +12V rails if that is the case.
6 pin = additional 75W
8 pin = additional 150W

What does the nameplate read for the +12V rail in amps and watts?

You can use one of these for the 6 pin connectors: http://www.newegg.com/Product/Product.aspx?Item=N82E16812200420&nm_mc=KNC-GoogleAdwords-PC&cm_mmc=KNC-GoogleAdwords-PC-_-pla-_-Internal+Power+Cables-_-N82E16812200420&gclid=COr4qeyBo8ECFQgDaQod7JMAQw