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The ATX PSU has the same dimensions as the LPX PSUs used on most AT systems at the time the ATX spec was created.SFX was a new size at the time, but the fan size made sense since most small systems it was meant for would me mini-ATX or flex ATX and wouldn't have that much power draw. Even the fans on CPUs and video cards are the time were likely to be 80mm.ATX is an old specification considering how quickly computing innovations progress.
The ATX PSU has the same dimensions as the LPX PSUs used on most AT systems at the time the ATX spec was created.
SFX was a new size at the time, but the fan size made sense since most small systems it was meant for would me mini-ATX or flex ATX and wouldn't have that much power draw. Even the fans on CPUs and video cards are the time were likely to be 80mm.
ATX is an old specification considering how quickly computing innovations progress.
