Smallest AT (aka OLD) PSU

[Niku-Sama]

i had a random thought, whats the smallest AT psu out there with -5 volts?
i had an idea for a ultra small retro gaming system a moment ago, i dont think i'd need much more than 60 watts, the fastest CPU would be a 400Mhz celeron and thered be no expansion a drive (probably CF) and maybe a floppy drive/emulator

 

[stompah]

If you already have an at motherboard then my recommendation won't help. But if you can source an ATX motherboard you can look for a Flex ATX PSU. You can still find them brand new.