Originally Posted by roleki
I have a Corsair 1000HX PSU sitting around, along with a pair of GTX 470s. The 1000HX is modular, but has a pigtail for 24-pin, EPS12V, and two PCI-E power connectors. It also has four more modular PCI-E connectors, two connections in 2 "banks", each on separate 12V rails.
The GTX 470s require 2x 6-pin PCI-E power connections, so I will need four of them in total. Should I...
A) Use the pigtail to power one card, and use both connections from Bank A, leaving Bank B empty (or vice versa)
B) Leave the pigtail alone, use Bank A to power one card, and Bank B to power the other
C) Use one lead from the pigtail to each card, then one lead from each bank to a separate card?
Or some other configuration?
I ask because, this PSU was from an RMA wherein the PSU died after about a year of powering these 470s. I got to wondering if maybe I had them 'powered' wrong.
I'm powering mine with the pre-attached connectors and the blue modular 12V1 connectors.Here
's a thread with a wiring diagram for the HX1000, depending on how much power your CPU draws you might be better off with the second pair of connectors attached to the 12V2 instead.
Chances are if you're overclocking the cards the way I have it is better because the cards are probably the most demanding thing in your system so splitting them between the two rails is a good idea.
Edit: To explain the rails, a HX1000 is basically two separate 500W PSUs inside one casing that have been designed to work together. This means you should balance your load across the two rails to avoid overloading one of the two 500W units.Edited by Mike-IRL - 10/17/12 at 1:24am