There are four PCI-E cables to accommodate a pair of 8800GTXs in SLI. Each cable is marked according to its rail, +12v1 and +12v2. This is quite cool, to ensure that each card will be on its own +12v rail. I personally have not seen a PSU labeled like this, though I'm sure there could be others out there. This is the kind of attention to detail I am talking about.