What is the maximum power that can be transferred to a 32-bit PCI slot?

Question

Iron

What is the maximum power that can be transferred to a 32-bit PCI slot?
If you connect an adapter for 5 usb 2.0 pieces to it, how many amperes in total they will pull is interesting.

Answer 1

These are two different questions.
A USB expander card will most likely not give you more than 500 mA per port, a total of 2.5 amps, it depends on the specific card, how the ports are wired.
But more can be done through the connector itself, there are 8 contacts for 5 volts, so 4 amperes can probably be pulled out of it.

Answer 2

In general, in theory, PCI-E (x16) can draw up to 375 (if 8Pin + 6Pin + 6Pin connector is connected) at 12V, and now simple mathematics
A2=375/12=31.25(A)
And USB 2.0 can "give" 5A at 12V
If you summarize everything, you get an easy and useless answer: maximum :)
But if you take USB 3.0, then it will have 3A at 12V
Source: Wiki

Answer 3

"The maximum +12V current is 500mA.
The maximum current that you could draw from +3.3V is 7.6A, because that
works out to 25W, assuming zero current on all the other supply
voltages. But this limit is "system dependent," so a given system might not have the
full 7.6A available for a slot even if it is the only PCI
card in the system.
supplies, rather than
making 25W available from +5V and 25W available from +3.3V.
The maximum current from +5V is 5A, with the same conditions as above
for the +3.3V supply."
Clipping from the forum