Newbie trying to set up a 6x7950 rig - page 2.

xhomerx10

legendary

Activity: 3808

Merit: 7912

Quote from: thehun on January 05, 2014, 03:24:28 PM

Quote from: thehun on January 05, 2014, 01:59:47 PM

Quote from: repairguy on January 05, 2014, 07:48:58 AM

The cards will not start up if you do not connect power to the molex connector on the riser. You must connect to every power connector on the cards, using splitters or adapters.

Why on earth would you use a pcie to molex adapter to power the riser? Huh

? Just use the molex connector on the power supply

Thanks, so I understand I need to get some splitters to power all cards. The PSU doesn't have any molex connectors.

Ok I think I have just answered myself and found the molex connectors, which simply look different to what I am used to seeing Tongue

=

Hun,

I am failing to see the difference...
You can also use the 8-pin connectors which might be a 6+2 config and come apart OR you will have to cut two off of one side - make sure you cut off the right ones.
Exactly which PSUs do you have? Corsair 750 what?
You might need some of these:

thehun

legendary

Activity: 1212

Merit: 1037

Quote from: thehun on January 05, 2014, 01:59:47 PM

Quote from: repairguy on January 05, 2014, 07:48:58 AM

The cards will not start up if you do not connect power to the molex connector on the riser. You must connect to every power connector on the cards, using splitters or adapters.

Why on earth would you use a pcie to molex adapter to power the riser? Huh

? Just use the molex connector on the power supply

Thanks, so I understand I need to get some splitters to power all cards. The PSU doesn't have any molex connectors.

Ok I think I have just answered myself and found the molex connectors, which simply look different to what I am used to seeing Tongue

=

thehun

legendary

Activity: 1212

Merit: 1037

Quote from: repairguy on January 05, 2014, 07:48:58 AM

The cards will not start up if you do not connect power to the molex connector on the riser. You must connect to every power connector on the cards, using splitters or adapters.

Why on earth would you use a pcie to molex adapter to power the riser? Huh

? Just use the molex connector on the power supply

Thanks, so I understand I need to get some splitters to power all cards. The PSU doesn't have any molex connectors.

repairguy

sr. member

Activity: 252

Merit: 250

The cards will not start up if you do not connect power to the molex connector on the riser. You must connect to every power connector on the cards, using splitters or adapters.

Why on earth would you use a pcie to molex adapter to power the riser? Huh

? Just use the molex connector on the power supply

thehun

legendary

Activity: 1212

Merit: 1037

Hi,

I have got eveything needed to operate a 6x7950 rig, with powered 1x to 16x riser cables. I have 2 different setups:

- one with Win 8 pro loaded on an external HD
- one with Xubuntu on a USB drive

and right now I can't get either of them to detect my GPUs (currently only 2 are connected). I'm not sure if I've connected them properly: I plugged 2 6-pin power cables into each of them but not the molex connector of the riser.

I have the following doubts at this moment:
- How am I supposed to power 6 GPUs with the 2x750W Corsair PSUs if each of them only has 4 6-pin PCI-e outputs. Can a card work with only one of these?
- I guess I need a PCI-e to molex adapter to power the risers. In this case, can I disconnect one or both of the PCI-e power supplies of the GPU?
- Do powered risers also work in non-powered mode?

Sorry if some of these questions are a bit silly but I'm still digesting all the information that's out there and can't see the light.

Cheers

Topic: Newbie trying to set up a 6x7950 rig - page 2. (Read 13885 times)