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PC Power Supply Discussion Troubleshooting and discussion of computer power supplies

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  #1  
Old 02-27-2007
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Default HardOCP's First Review: BFG 1000W

http://enthusiast.hardocp.com/articl...50aHVzaWFzdA==

That is one great reivew right there. Just like the PCPer review, it does not output 1000W but this time it does live up to its 80+ certification.

One line that did concern me though:

Quote:
This bouncing does occur with a number of power supplies so it is not unique to this Topower/BFG PSU but a top tier PSU should be regulating its output better than this.
As far as I am concerned, Topower is not a top-tier PSU manufacturer.
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Old 02-27-2007
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Heh - Topower's not even in the middle of my list anymore

Good review
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Old 02-27-2007
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lol,I found it funny how they found noripple :P Topower is not even on my mid-teir either lol
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Old 02-27-2007
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Quote:
Originally Posted by Chilly View Post
lol,I found it funny how they found noripple :P Topower is not even on my mid-teir either lol
Yeah I was pretty skeptical myself while watching the traces....but they checked accross two units. Unfortunately before I was able to really try and force the issue the units died.
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Old 02-27-2007
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Are you sure your o-scope is working?
I find it odd that Lee's review found excessive ripple on the +3.3 and +5V rails at 600W and 800W but your review unit's ripple was quiet as a tomb. Can there be THAT much difference between units?
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Old 02-27-2007
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It was when I set it up and tested everything before the BFG review. I was using a Betsec PSU as a base line and it showed a much dirtier profile comparitively (until it died) unfortunately I wasn't recording anything because I was just testing. It is still within the realm of possibility that something happened to it....and i have another unit set for this week. If I see something similiar that would probably answer the question.
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Old 02-27-2007
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Hate to say it, but your Oscope is definitely all wrong. Ripple's not that low on that PSU.

3.3V is a straight line. That's impossible. You're should at least see some movement, even if it's .5mV, just from ambient RF.

Whenever I'm in doubt, I change the V/div on the Oscope from .05V to .01V and look for a change. I'll also turn the dial back and forth to see if I get a "jump" in my waveform.
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Old 02-27-2007
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Quote:
Originally Posted by jonnyGURU View Post
Hate to say it, but your Oscope is definitely all wrong. Ripple's not that low on that PSU.

3.3V is a straight line. That's impossible. You're should at least see some movement, even if it's .5mV, just from ambient RF.

Whenever I'm in doubt, I change the V/div on the Oscope from .05V to .01V and look for a change. I'll also turn the dial back and forth to see if I get a "jump" in my waveform.

I did try adjusting it, swapped BNC cable, etc and the only thing that changed was on the 12v with the BFG. I couldn't get the 3.3v/5v to do anything. I have another PSU that should be there today and I am going to give it a shot and see what is going on.
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Old 02-27-2007
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Jonny is right as usual....I don't see ANY play on the +3.3V readout. Is it possible that something is interfering with the signal?

Hopefull the review will be edited accordingly once the problem is found.
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Old 02-27-2007
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I don't know what kind of intereference it would take to completely cancel out a waveform.
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