how many watts is this?

Fairybub

Commendable
Sep 24, 2016
26
0
1,540
so my friend asked told me that he needed a new psu to run 5850 because his old one is not sufficient(250W). he was on a budget of under 40$ and doesn't care if something was second. then he found a psu (brand not said, yet) but all I got is the information.
+3.3v@21A +5V@20A. +12V1@14A +12V2@14A
both +12V rails have max 340W.
if I remembered correctly he said it was a 500W(?) or a 550 (can't remember which is it) with effiency >70% that's all I know.
just curious how many watts will it deliver? and how many amps on a 12V rail for 500W or 550W.
Thx
 
Solution
A good PSU is typically able to provide close to its total rated wattage on the 12V rail, as that's where nearly all the power is drawn from in modern PCs. So I would consider that closer to a 350W PSU, and probably not a very good one at that. Running a sketchy PSU runs the risk of damaging other components, or even starting a fire in rare, extreme cases.

To answer your other question: watts = volts x amps. So for 500 W on 12 V rail, you need about 42 A.

TJ Hooker

Titan
Ambassador
You can't just add the wattage of each rail separately. PSU manufacturers typically list how much current each rail can provide on its own, but then show how much a given group of rails can supply in total at once (the same applies for the two 12V rails). There's no way of saying without know the model and looking at the specs.

In all likelihood that's a pretty poor PSU though.
 

Fairybub

Commendable
Sep 24, 2016
26
0
1,540


I just got the picture from my friend. brand in which i have never heard of, i told him not to buy it though. pic is

IMG_2621-500x500.JPG


i cant even find the website, it is a very poor psu.
 

TJ Hooker

Titan
Ambassador
A good PSU is typically able to provide close to its total rated wattage on the 12V rail, as that's where nearly all the power is drawn from in modern PCs. So I would consider that closer to a 350W PSU, and probably not a very good one at that. Running a sketchy PSU runs the risk of damaging other components, or even starting a fire in rare, extreme cases.

To answer your other question: watts = volts x amps. So for 500 W on 12 V rail, you need about 42 A.
 
Solution