Ok, I didn't really understand how the rails were divided. It appears all of the Molex and SATA connectors are on one rail. And that two rails are dedicated to one 6-pin PCI-e connector each.
So, with my system, using a DFI nForce4 Ultra MB and XFX 6800GT video card, is not using two rails and sharing an MB Molex and video card Molex with 6 disc drives, 2 DVDs, a floppy, and two case fans. That's enough of a load that the MB driven fans (cpu, northbridge, one case) don't spin if the discs are connected and booting itself is problematic.
What is the best way to rectify the problem? Get a different PSU? Build an adapter cable? It would have to borrow 5v from an existing Molex and use the 12v from a 6-pin connector. Would the new cable need 5v? Does the MB, video card, disc drives, etc take 5v from the Molex?
Thanks for your help...I running with one disk powered up now.
David
So, with my system, using a DFI nForce4 Ultra MB and XFX 6800GT video card, is not using two rails and sharing an MB Molex and video card Molex with 6 disc drives, 2 DVDs, a floppy, and two case fans. That's enough of a load that the MB driven fans (cpu, northbridge, one case) don't spin if the discs are connected and booting itself is problematic.
What is the best way to rectify the problem? Get a different PSU? Build an adapter cable? It would have to borrow 5v from an existing Molex and use the 12v from a 6-pin connector. Would the new cable need 5v? Does the MB, video card, disc drives, etc take 5v from the Molex?
Thanks for your help...I running with one disk powered up now.
David