RE: Maximum Power for add in card more than 25W

[Richard Walter <rwalter@Brocade.COM>]

Brad,

I've seen AGP cards that added a disk-drive power connector so that after the card is installed in the system, it could pull power from both the gold fingers and from the drive power system.

It would cost you some power supply circuitry to your board, but then you could draw 25W from the gold fingers and xxxW from the drive connector (where xxx is whatever the max power for a disk drive is (which I don't know, off-hand)).

-Richard Walter
Senior Hardware Engineer
Brocade Communications Systems
rwalter@brocade.com
Note: I speak for myself, not for Brocade Communications.


-----Original Message-----
From: brad yu [mailto:bradyu2001@yahoo.com]
Sent: Tuesday, December 19, 2000 9:54 AM
To: pci-sig@znyx.com
Subject: Maximum Power for add in card more than 25W


Hi,

I'm designing a PCI add in card, from the PCI Spec
(page 146), there are two pins that are used to
indicate the power comsumption for an add in card. 

My question is, how if an add in card consume more
power than the maximum power that is shown by the
PRST1# and PRST2# pin (i.e 25W)? What will happen and
what are the workaround so that my add in board which
consume more than 25W can works. Thanks.

Cheers,
Brad

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