Group,
I am trying to find some information on the supply power
specifications for PCI expansion cards but am finding it hard to get
information without purchasing the whole of the PCI bus standard.
Does anyone know where I may find this information in the public domain?
Or can anyone who has a copy of the spec enlighten me?
I believe that the power requirements are in chapter 4.4.2.2. "Power
Consumption" and state the following:
- The maximum power allowed for any board is 25 watts, and represents
the total power drawn from all power rails provided at the connector
(+5V, +3.3V, +VI/O, +12V, -12V, +3.3Vaux). The expansion board may
optionally draw all this power from either the +5V or +3.3V rail.
Is this all the spec has to say on power or is there more detail on load
balancing between supply rails etc?
Many thanks in advance,
Duncan.
Duncan Hobbs, Senior Compliance Engineer
Xyratex Product Compliance Lab.
Havant, Hants, U.K.
02392 496444
[email protected]
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