I currently am running a pretty nice gaming system with a 7970. Everything is running on a 600w PSU. I would like to add a 6950 which has a 159w TDP I believe (I know you can't run a 7970 and a 6950 together for games, I am going to be bitcoin mining).
I already know how to link two power supplies together, but I have this old 266w PSU laying around and I was wondering if and how I would be able to use it to power the 6950 until I get a good PSU. It is multi rail, has a 22 pin mobo connector which I would use to link the PSU's, and four molex connectors. I would be using Molex to 6pin adapters. It says it sends it puts out 266.2w maximum, but the fact that is multi rail leaves me wondering if whether or not the molex cables will distribute the right amount of power to the card.
Here is what is says on the sticker of the card:
+5v - 18A Max +3.3V - 13A max
-12V - 0.2 A max +12V - 18A max
AUX +5VSB 1.8A max +5V, +3.3V Total 122.9W max
Will I just be able to link this PSU with another PSU via an adapter, and then use Molex to 6 pin adapters on this PSU to power the 6950?