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Originally Posted by Butcher
Parallel of course. Series wiring would mean everything at a different voltage...
Why would AGP cards using a bridge cause the 123.5W to be rubbish? I can't imagine the bridge uses a vast amount of power (no heatsink). Ok you can knock off a few watts for the bridge, big deal.
Voltage stepdown accounts for 10-20% of power (6800U cards are known to have switching power regulators so they are relatively efficient), not 50+%. Still talking near 100W.
If you check the article you will see he measures the current from the molex connector going into the card. That's not going to be affected by other components, because he's measuring direct input to the card, not total PSU draw.
Unsure on fan power - will check mine later (it's no longer on my card so easy to verify power draw).
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Otherway around - they are based on AGP electronics using an AGP -> PCI-X bridge. Ergo, they are wired for agp + aux voltage and then the max rating of the PCI-X bus has no impact.
Second, just because 120ishW is used IF the pci-x bus is full exhusted does not mean that it is (or will be) fully used. Thats the theoretical max load given the measured aux - has nothing to do with reality.
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EDIT: Sorry, I'm being dumb. I was confusing this with a different review I just saw covering the power on the PCI-X versions.
The 46W max AGP is still the theoretical max. So I still wouldn't assume its going to hit that. I guess we'd need to hit the bottom of the mobo with the multimeter.