How to know PSU wattage Tags: Power Supplies Components Last response: March 7, 2013 10:30 AM in Components Share blueboy92 March 7, 2013 8:16:46 AM I have an ETON PSU mode no. PS-21. It doesnt say anything about watts. There is a table that shows just AC input and DC output. DC output: +3.3V - 23A +12V - 25A -12V - 0.5A +5V - 22A -5V - 0.5A +5Vsb - 2.5A Is there a way to know the wattage from this info? More about : psu wattage rolli59 a c 670 ) Power supply March 7, 2013 10:30:28 AM Multiply the volts and the amps and add them up. It is as close as you get but round down at the end to the closest even number like 400 or 450. Can't find your answer ? Ask ! Publish Related resources SolvedWanting to OC, but need to know wattage for PSU Forum Solvedbuilding new pc, don't know the psu wattage I need. Forum Solvedi wanna upgrade my cpu in my m2n32 sli deluxe mobo, i wanna know how big i can go in terms of wattage, ghz and cores the socke Forum planning to buy new PSU, don't know what exact wattage should i buy? help me! Thanks! Forum SolvedHow much wattage for psu Forum SolvedHow do I tell the wattage on my PSU? Forum SolvedHow many Wattage PSU do I need for this build? Forum SolvedHow much wattage does my PSU need Forum SolvedWhat PSU/how much wattage do i need? Forum Solvedhow much psu wattage do i need for a new Graphics Card? Forum SolvedHow do I determine PSU wattage requirements? Forum SolvedHow much PSU wattage is needed for GTX 770 and GTX 560 Forum SolvedHow much PSU wattage would I need for my build? Forum SolvedHow much PSU wattage would I need for my build? Forum SolvedHow much PSU wattage will I need? Forum SolvedHow much PSU Wattage do i need? Forum SolvedHow much extra wattage should my PSU be Forum SolvedHow much wattage? Help with PSU for new build Forum New PSU: How much wattage do I need Forum SolvedHow Big of a PSU do I need (Wattage) Forum More resources Read discussions in other Components categories Power supplies Sound cards NICs Akasa Antec Cooler Master Cougar DeepCool Enermax !