hst101rox :
ttt_2017 :
Just make an external SFX-L powersupply case ... place any SFX-L inside for 100 $ only and enjoy is it hard to do ?
But laptops (externally) run on just one voltage, usually 19-20V. Just 1 rail.
DC to DC boards are very easy to make and very efficient (unlike AC to DC)
All what they need to add is a 12V to 19.5 V DC to DC converter inside that case and connect it to the 12V Rail of the powersupply.
and the Majority of the powersupplies are single 12V rails today , and they use DC to DC converter as well to get 5V and 3.3 V from 12V rail so if you never use the 5V and 3.3V you will still get the full wattage from the 12V port...... you dont need to worry where to plug the 12V port from the DC to DC converter (12V to 19.5V)
Powersupply 12V port ----> DC to DC converter ----> 19.5V output
alot much better than paying 10 times the price !!!