How exactly does this 8-pin cable work?

[Extelleron]

A little over a month ago I purchased an HX520 PSU for my new build and recently I requested and received Corsair's 8-pin PCI-Express cable for an HD 2900XT (I don't own the card yet but I plan on buying it.)

There were two identical cables included... the cables have 2 PCI-Express 6-pin connectors on them, and one 6-pin connector with a 2-pin right next to it... I suppose to make the 8-pin.

Here's what they look like (basic drawing in Paint): http://i3.photobucket.com/albu.../Corsair8-pincable.jpg

Real-pictures (horrible pics but the best I can do)

2 Pictures of the "Middle 6-pin" (the other 6-pin is connected to this one and then this connects to the 8 pin)
http://i3.photobucket.com/albu...xtelleron/PICT0046.jpg
http://s3.photobucket.com/albu...w&current=PICT0044.jpg
-The other 6-pin comes in on the left, and then the middle 6-pin connects to the 8-pin on the left.

Pic of the "6 + 2 pin" 8-pin cable:
http://s3.photobucket.com/albu...w&current=PICT0047.jpg

I'm presuming that I connect the two 6-pin parts to the HX520, and then the "8-pin" part to the card. Is this correct, and will I be able to use this 8-pin cable plus a regular 6-pin cable on my PSU?

 

[poohbear]

yep that sounds about right. corsair mailed it 2 u for free? fabulous, im gonna get dat psu myself.

 

[Extelleron]

Originally posted by: poohbear
yep that sounds about right. corsair mailed it 2 u for free? fabulous, im gonna get dat psu myself.

Well, I had to pay for shipping, but the cable is free.

 

[krotchy]

can you investigate the actual location of the wires going into the header?

From your drawing I also cant tell the lengths of them either, so I cant tell if maybe that 1 cable is meant to supply both a 6 and an 8 from one PS connector or if it is daisy chained with each 6 pin modular connect probably going to 4 pins each of the 8 pin header

 

[Extelleron]

Originally posted by: krotchy
can you investigate the actual location of the wires going into the header?

From your drawing I also cant tell the lengths of them either, so I cant tell if maybe that 1 cable is meant to supply both a 6 and an 8 from one PS connector or if it is daisy chained with each 6 pin modular connect probably going to 4 pins each of the 8 pin header

Added pics above.

 

[Extelleron]

bump

 

[Extelleron]

bump

 

[Yellowbeard]

It may be my lack of coffee but, I am not clear on your question. Connect the 6 pin end to the PSU and the 8 pin (6+2) end to the video card.

 

[Extelleron]

Originally posted by: Yellowbeard
It may be my lack of coffee but, I am not clear on your question. Connect the 6 pin end to the PSU and the 8 pin (6+2) end to the video card.

Will I still be able to connect the other, regular 6-pin cable to the PSU then? I don't know exactly how it works w/ modular cables, but I thought only 2 PCI-Express x6 connectors could be used with the HX520, and this one 8-pin cable would utilize both.

 

[Cheezeit]

Originally posted by: Extelleron
<div class="FTQUOTE"><begin quote>Originally posted by: Yellowbeard
It may be my lack of coffee but, I am not clear on your question. Connect the 6 pin end to the PSU and the 8 pin (6+2) end to the video card.</end quote></div>

Will I still be able to connect the other, regular 6-pin cable to the PSU then? I don't know exactly how it works w/ modular cables, but I thought only 2 PCI-Express x6 connectors could be used with the HX520, and this one 8-pin cable would utilize both.

You won't be able to use the other PCI express port on the PSU. This special cable will take up both.

 

[Extelleron]

Originally posted by: Cheezeit
<div class="FTQUOTE"><begin quote>Originally posted by: Extelleron
<div class="FTQUOTE"><begin quote>Originally posted by: Yellowbeard
It may be my lack of coffee but, I am not clear on your question. Connect the 6 pin end to the PSU and the 8 pin (6+2) end to the video card.</end quote></div>

Will I still be able to connect the other, regular 6-pin cable to the PSU then? I don't know exactly how it works w/ modular cables, but I thought only 2 PCI-Express x6 connectors could be used with the HX520, and this one 8-pin cable would utilize both.</end quote></div>

You won't be able to use the other PCI express port on the PSU. This special cable will take up both.

Can the HX620 support more PCI-Express connectors? Otherwise what is the point of sending out this 8-pin cable?

 

[Cheezeit]

I think the HX520 and HX 620 both have the same amount of PCI-E connectors (2). The 2900XT operates at normal speeds with both of the 6 pin plugs plugged in. However, the overclocking function only shows up when you plug in a 6 pin PCI-E and a 6+2 pin PCI-E plug. If you don't plan on overclocking the 2900XT, you don't even need that special cable. If you do want to overclock it, use the special 8 pin cable and then use the molex to 6 pin PCI-e adapter included with the HX520/620.