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Originally Posted by bear jesus
Would it make a difference if the molex and pci-e connectors are all on the same rail?
I ask as i ordered 2 6870's for crossfire and only just realised when i noticed this thread that my hx620 only has 2 pci-e connectors but they are on the same rail as the rest of the modular cabling.
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I don't see why it would be an issue unless you're overloading that rail. So far as I know there is no reason why a PSU can't have one giant 12V rail that powers everything. It's just cheaper to have several lesser 12V rails.
Also I don't think you're correct on how your rails are divided. According to the internets your HX620 has 3x12V rails. Chances are one is going to the CPU/MOBO, one to the molex connectors and one to the PCIE connectors. Either that or one to the CPU/MOBO/molex and two for the PCIE connectors... Also the HX620 is a very high quality part and apparently has load sharing capability.
Quote:
Originally Posted by bear jesus
Is there a reason why it's normally suggested to use a psu with the right number pci-e connectors for however many cards you are using?
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I can't think of an absolute reason but hopefully PSUs with 4xpci-e connectors are expected to work when all of them are plugged in. Unfortunately I know this isn't always the case. (Also it's nice not to buy adapters, eh?)