Anyone who has purchased a lower-end Coolermaster Case with a PSU included probably found one of these inside of it, so let's see how good or bad it is.
First off it is not a 350w, if you add up the individual rails it comes to 250w, we'll find out why in a moment.
First the input side, there is decent input filtering (only half is on this board the other coil and Xcap are attached the the power connector for a total of 2 Xcaps, 2 Ycaps, and 2 Coils, not the best I've ever seen but considering many PSUs in this class have no input filter at all this isn't too bad.
GBU4G Bridge Rectifier rated at 4A 400V, considering this is a 250W PSU this is defiantly sufficient
A Pair of Canicon 470UF 200V filter caps, I'd prefer 680UF caps although 470s should be ok for a 250W unit.
Decent Sized Coils, Two D304X primary switchers, more than sufficient for a 250W
Now we move on to why this is really a 250W PSU.
One F12C20C Schottky on the 12V rail rated at 12A 200V, Given that this rail is rated at 10A this is just barely sufficient with only 2A of overhead.
Two S20C45C Schottkys each rated at 20A 45V one for the 5V and another for the 3.3V. These rails are rated at 14A each so again a 20A part is sufficient although I would like to see more than 6A of overhead.
Decent sized coils and caps for a 250W PSU although all the caps are either Canicon or Sapcon, not exactly the best brands.
Bottom line this isn't all that bad for a "Free with a Cheap case" PSU. If you stick to the ratings of the individual rails and only use it in a low end system it will probably do ok for an extreme budget build, just don't try to load it up too heavily, and forget about quad core processors or high end video cards. I would however recommend a better unit if budget allows.
Stay tuned for a rebuild, this thing appears to have some potential. I'm planning on swiping the much more substantial secondary rectifiers from a dead Dell Celetronix CX305P (proprietary Dell BTX casing that is slightly larger than standard ATX meaning it won't fit in a normal ATX tower and thus not worth repairing), and upgrading the Caps as well when I get some free time.
First off it is not a 350w, if you add up the individual rails it comes to 250w, we'll find out why in a moment.
First the input side, there is decent input filtering (only half is on this board the other coil and Xcap are attached the the power connector for a total of 2 Xcaps, 2 Ycaps, and 2 Coils, not the best I've ever seen but considering many PSUs in this class have no input filter at all this isn't too bad.
GBU4G Bridge Rectifier rated at 4A 400V, considering this is a 250W PSU this is defiantly sufficient
A Pair of Canicon 470UF 200V filter caps, I'd prefer 680UF caps although 470s should be ok for a 250W unit.
Decent Sized Coils, Two D304X primary switchers, more than sufficient for a 250W
Now we move on to why this is really a 250W PSU.
One F12C20C Schottky on the 12V rail rated at 12A 200V, Given that this rail is rated at 10A this is just barely sufficient with only 2A of overhead.
Two S20C45C Schottkys each rated at 20A 45V one for the 5V and another for the 3.3V. These rails are rated at 14A each so again a 20A part is sufficient although I would like to see more than 6A of overhead.
Decent sized coils and caps for a 250W PSU although all the caps are either Canicon or Sapcon, not exactly the best brands.
Bottom line this isn't all that bad for a "Free with a Cheap case" PSU. If you stick to the ratings of the individual rails and only use it in a low end system it will probably do ok for an extreme budget build, just don't try to load it up too heavily, and forget about quad core processors or high end video cards. I would however recommend a better unit if budget allows.
Stay tuned for a rebuild, this thing appears to have some potential. I'm planning on swiping the much more substantial secondary rectifiers from a dead Dell Celetronix CX305P (proprietary Dell BTX casing that is slightly larger than standard ATX meaning it won't fit in a normal ATX tower and thus not worth repairing), and upgrading the Caps as well when I get some free time.
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