Amps need for my 9800GTX+

Hi,

I need help understanding some things regarding psu requirements. The 9800 GTX+ say "min: 450w (12V at 24A)."

Does the card max need 24A on each of the 6 pin connectors, or does it needs 24A total on across the 6 pin connectors?

no

single rail have unlimited power, quad rail is limited and most are cross conntect

v1 + V2 +v3 = v1

v1 + v2 +v4 = v2 and so on

if you have a quad rail, the max is 12v and most have a max of 18amp or 150watt some go up to 24w but that rare and may only be peak power

if you 9800GTX usess up to 250w
then the first 75w comes from the pci-e slot
then the next 150w comes from the first 6 pin - first on how its wired not in order you look at

the remaining is from the second 6 pin

8pin gives more and cross conected for hiigher amp on single rail

4870X2 can suck up to 350w+

6 pin PCI-e connector can only provide 75W max.

Thank you all that responded, that was the clearest and most straight forward answer I have seen in any forum. I fully understand and really appreciate your knowledge.

The 9800GTX+ needs about 9 amps. The 24 amps is the total recommended power for a "typical" - whatever that is - system.

You need 2 PCI-e 6 pin connectors, but the number of 12V rails does not matter.