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Determine the Quality of PSU

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Nov 5, 2002
Seattle, WA
I would probably say in this order:

1. Variances (Percentage of swing on rails either way)
2. Rails and amperage.
3. Weight

Oh, and you can stick price in there somewhere too :D


Jul 14, 2002
Do you mean something that can be checked in the store?

How about the ratio of the combined power to the total power? I noticed that for some some cheap 400W PSUs it's only 50%, making them weaker than the best 300W PSUs.

I think that for PSUs of a given power rating, the size of that transformer between the two heatsinks may be a good indicator of quality, and I recently noticed that the cheap, wierd brand 500W PSUs at Fry's had transformers as small as the one in my best 300W. But I don't know what frequencies they used, and higher lets a transformer be smaller. My 300W runs at 95 KHz while most PSUs use 60 KHz.
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