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6+2pin +6pin on single cable for 8/8pin card

post #1 of 8
Thread Starter 
My power supply (Silverstone Strider Gold 1000w) came with 2x 6+2 pin cables and 2x 6+2pin with 6pin cable added on. I have 2 MSI lightning gtx 580s and they both require two 8pins each. I was wondering if I can just use the 2 cables with 6+2 +6pins and then use the supplied 6pin to 8pin converter or will I have to use all 4 cables and let those extra 6pin cables hang loose?

I am worried because 6 pins are rated at 75W and 8 pins are rated 150W but I read conflicting information that 6pins can deliver that much power and that the extra 2 pins on 8pin cables are just ground pins.

I really don't want to have to use 4 cables with 2 extra 6pins hanging there, it will look very messy.

dsc0004tu.jpg
post #2 of 8
They are on the same cable so you just half the amps.

I would need to see the psu side label and where you are plugging the modular cable in to answer your question.
Edited by andrewmchugh - 10/2/11 at 2:30am
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post #3 of 8
Thread Starter 
My PSU is rated 83Amps on the 12V rail. The cable plugs into the 8pin PCI-E conenctor on the PSU.

silverstone_strider1000g_11.jpg

The blue cables are the ones im talking about.

I'm thinking these cables are to be used as a single 8 pin or 2x 6pins.
Edited by amvnz - 10/2/11 at 2:42am
post #4 of 8
Use all four blue connectors of your PSU.
Use all four cables, with each cable running to its own PCIe input.
post #5 of 8
Thread Starter 
Quote:
Originally Posted by windfire;15145852 
Use all four blue connectors of your PSU.
Use all four cables, with each cable running to its own PCIe input.

Ok, I may have to buy 2 extra 8pins as I don't want these extra 6pins hanging there.

Is it dangerous to run 2 cables for 4 8pin connections? Will those cause a fire or something?

EDIT: What would be the purpose of these cables anyway? Are they to be used as double 6 pins as a single PSU connector is capable of that?
Edited by amvnz - 10/2/11 at 3:16am
post #6 of 8
Quote:
Originally Posted by amvnz;15145901 
Ok, I may have to buy 2 extra 8pins as I don't want these extra 6pins hanging there.

Is it dangerous to run 2 cables for 4 8pin connections? Will those cause a fire or something?

EDIT: What would be the purpose of these cables anyway? Are they to be used as double 6 pins as a single PSU connector is capable of that?

not really dangerous the connectors themselves are rated much higher then your psu is capable of

you can read here for more info

http://www.jonnyguru.com/forums/showthread.php?t=7212
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post #7 of 8
Quote:
Originally Posted by amvnz;15145901 
Ok, I may have to buy 2 extra 8pins as I don't want these extra 6pins hanging there.

Is it dangerous to run 2 cables for 4 8pin connections? Will those cause a fire or something?

EDIT: What would be the purpose of these cables anyway? Are they to be used as double 6 pins as a single PSU connector is capable of that?

Pic 1 shows the four cables with blue connectors and they all are to be used. They connect to the four blue connectors of the PSU.

Diagram 2 shows a cable. One end is the blue connector that goes to the PSU. The other end has one 6+2 pin connector and one 6 pin connector.

If the 6+2 pin is used, it acts as a 8-pin connector and is rated as 150W. The other 6-pin connector is not to be used simultaneously.

However, if the 6+2 pin is used as a 6-pin connector (rated at 75W), then the other 6-pin connector (also rated at 75W) can be used simultaneously.

When an over current happens, this will trigger the OCP (Over Current Protection) feature of the PSU and it will probably just shut down. There will not be an explosion or a fire.
post #8 of 8
Thread Starter 
Thanks for the explanation good sir. +rep to you.
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