A cx600 would be useless to over clock a s3! I need 2 cx750 to have two overclocked s3s
Why do you say that? Have you actually run an S3 with a CX600?
Even if an OC'd S3 draws 450w at the wall, it only represents a 73% load on the CX600.
That's not really how power supplies work. Overall wattage is not the representation of how much power it can give on the 12v rail.
The cx600 has a 46A on the 12V rail, this is 552watts. That's 81.5%load without the added power draw from the wall minus efficiency of the power supply.
Seems it only comes with 2x PCI-E adaptors, so you would need molex to PCI-E or sata to PCI-E if you wanted to connect all 4.
Your explanation on "how power supplies work" does not make any sense at all. I think it only leads to more confusion. How did you come up with 81.5% load on the CX600 with an S3? Please elaborate. What "added power draw from the wall" are you referring to? It is the actual power draw at the wall that computations should be extrapolated from because it is the only concrete number we can get out of the S3 or any device for that matter. Let us indulge ourselves:
AC power draw at the wall * PSU efficiency = DC power draw on +12V rail of PSU
DC power draw on +12V rail of PSU / max load on +12V rail of PSU = % of load exerted on +12V rail of PSU
Therefore (assuming an OC'd S3 draws 450WAC at the wall using a CX600):
450WAC *
85% = 382.5WDC
382.5WDC /
522WDC * 100 = 73.28%
I am aware that the CX600 label states 46A on the +12V rail, hence you came up with 552W (46A * 12V). Confusingly, the same label also states that the maximum +12V rail wattage is 522W. Which one is a typo? Should it have been 43.5A (522W / 12V) instead of 46A? Anyway, I tend to be conservative and go with the lower rating and be on the safe side which is why I used 522W on the above computation that resulted in a 73.28% load. However, even with a maximum of 552W on the +12V rail as you asserted, the load would then be much lower at 69.29% (382.5WDC / 552WDC * 100). So, where was your "81.5%load without the added power draw from the wall minus efficiency of the power supply" derived from?
I reiterate that the Corsair CX500 (also with only two PCIe power connectors) is able to accommodate an S3 OC'd to 250M without any issues whatsoever let alone a CX600. I am not just saying this for the heck of it; I and at least another member in here actually did it. Please read
here.
