L7 630W - how do i tell the PCI-e rails apart?
So i got myself this shiny nicey PSU, and i have this GTX295 to be powered by it. Now, it consists of two PCBs each 150W powerful, one of which draws some power from mainboard through PCI-e slot (up to 75W), some from a 6-pin connector (up to 75W). Another PCB has no direct connection to mainboard and pulls up to 150W through an 8-pin connector.
I'm reading mr. Stefan's post here: http://www.be-quiet.net/forum/showth...CM-information
The PSU having two rails, and the GPU being so highly asymmetric, i was thinking whether it might trip protection in normal use.
Worst case of rail 1:
60W - 3 SATA drives
75W - PCI-e power through mainboard
150W - PCI-e power 8-pin
While the second rail only need to feed a 65W CPU and a 75W 6-pin connector to the GPU.
To illustrate what i mean, if the two PCI-e power leads where swapped, PSU rail 1 would carry 75W less and rail 2 75W more, providing for pretty much equal maximum load.
In worst case, rail 1 carries thus 285W or 23A, apparently well under the 30A limit... And yet, i wonder whether there's any possible problem - or benefit - from one or other particular arrangement.
And then, i can't find the slightest hint to tell the leads coming from the PSU apart, they don't seem to have any different markings, which of them belongs to each rail. So, is there a sneaky way to tell them apart, and does it even matter which is which?