As all of you can see i'm a new guy here. I have been scratching my head over a new GFX card and how to connect the power supply to it.
It's a Asus GTX 580 DirectCU II that has 2x8-pin connectors. Now my PSU is a Coolermaster silent pro gold 700watt.
The PSU itself has a 2x6-pin connections with the option of having 1 of them in a 8-pin, so in other words you get 6-pin,6-pin or 6-pin,8-pin and then there are 2 extra PCI-E openings on the PSU with the same cable configuration.
My question here is, do I use the rail 8pin + an extra PCI-E connection 8-pin cause I can't see how otherwise I would connect the damn thing?
The PSU itself has the 2x4 12v rails for the mobo and then a seperate PCI-E rail along with the 2 extra on the modular side.
I wasn't sure if I would be able to use an adapter cause as you pointed out there wasn't any withe the PSU, just the standard cables.
I had a XFX HD 5870 that used the 2x6-pin connectors fine, it's just the new card that got me wondering...and yep, I don't just want to go ahead and plug stuff in and fry a $1000 card (I live in NZ but used to live in the UK and that's where my PC is from hence posting on the UK site )
Just use the other 6 pin cable. You do not need an adapter. An adapter would not do anything for you anyway.
... 3, 2, 1.
"But the 8 pin connector is designed to provide 150 watts, instead of 75 watts."
That is what they say. But is it really true?
Look at the 6 pin connector. You have three hot lines (yellow 12 volt) and three ground lines (black). Now look at the 8 pin connector. You have 3 yellow and 5 black wires. Please tell me how adding 2 more ground wires will miraculously double the current capacity of a cable.
And the adapter will not miraculously double the current capacity its source.
I have just had a look and can confirm what you said. Now the golden question is what side to I connect the 6pin in the 8-pin connector....to the left side or the right side as the latch for the connector is in the middle and I would have NO idea where the "power" side is as the yellow wires sits on the bottom of the connection.
(Sorry if I ask obvious or stupid questions but last time I did the "just plug the dam thing in and let's go" it ended up in a massive fire ball and a friendly visit from the fire department.... )
The 6 pin connector can provide much more power than what it is rated for, that's how manufacturers are able to use the pigtail configuration on the power cables.
That said, I wouldn't use a single cable with 2 connectors for any high end video card.
You should have a modular cable that matches the native cable, use it.
This is the thing I was also wondering...cause at the end of the day the 2x6pin plug is just a split off the 1 plug...so both plugs gets power from 1 cable and not 2 diffrent cables...
...and here comes the but...
but if I use the 1x8pin from the native cable and 1x8pin from the modular cable I'll have 2 seperate power cables providing the power.
So in other words my PSU can power 3 seperate GPU's either with 2x6pin(3 wires) plugs each or a 6pin/8pin(still 3 wires with 1 plug having the 2 extra black wires to make it 8pin) configuration...and if I plug in my GFX card the way I just described there it will then only leave 1 modular
cable free for another card (and that's ok cause i'm just planning on using 1 card)
The REAL question was actually if I use 2 seperate power cables to provide power to the GPU will it fry or will it be ok as I said in the past I only used 1 power cable for my HD 5870 and it worked fine, but now i'll either
1.Use an adapter for 1 of the 6pins and still use only 1 wire
2.Just plug the 6pin in without an adapter (and I still don't know if it goes left or right of the plug?..or..
3.Use 2 seperate 8pin plugs off 2 wires and fry the card?
The REAL question was actually if I use 2 seperate power cables to provide power to the GPU will it fry or will it be ok as I said in the past I only used 1 power cable for my HD 5870 and it worked fine,
Using 2 cables won't fry the card, it will give you the 2 x 8 pin connectors that you need.
An overclocked GTX580 uses a hell of a lot more power than a 5870.