What's the difference between AT & ATX power supplies?
(1) They are identical except for their shape.
(2) At supplies use a single P1 power connector while ATX uses P8 & P9.
(3) At supplies use P8 & P9 power connector while ATX uses a single P1 connector.
(4) At power supplies run on 120V AC current while ATX uses 220V AC .
(5) None of these.
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Your answer is right question answer question is option 3
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