Re: Questions about motherboard with DC input
I don't think 20v into a 19v device is a problem. It's only 5% difference and motherboards like this usually allow for more than that. I have an asrock AM1H-ITX, which says 19v +- 10% and I power it with a 20v adapter without any problems.
But are you sure that the dc-dc converters on the motherboard are powerful enough to power up 60w of HDDs when spinning up?
mur
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Last Activity: 12-26-2022, 11:46 AM
Joined: 02-23-2010
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Re: Allied AL-8460BTX (450W) worth recapping?
Is this psu made for 220v only? Because if you would use it on 110v power, both caps would get the same voltage anyway because of doubler circuit. If the voltage is that far asymmetrical I think you have bad primary caps.Leave a comment:
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Re: -12v & -5v question
Either the psu doesn't have -5v rail or mobo reading is false.
Either way you can't trust motherboard readings. My board reports my 12V rail at 4.86V, 3.3V at 1.15V and -12V at -3.97V. Only the 5V reading seems fine at 5.03V.Leave a comment:
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Re: PC Restarting/ Shutting off abruptly.
Well, you say that the reason why new PSUs have 90% efficiency in reviews is because APFC spoofs wattmeters. But if it spoofs them that way so they show less power than they really use, power companies are on loss not profit as you said in another post.
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Re: PC Restarting/ Shutting off abruptly.
Thinking of what I said before, what would even be the amount of heat dissipated in kilowatt PSUs! Put one computer that needs a kilowatt PSU in each room in your house and you don't need your central heating anymore! Oh, and make sure every PSU has APFC.
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Re: PC Restarting/ Shutting off abruptly.
Ok. Maybe the real efficiency is 89%, but not as low as you think.
Let's take this example.
So you have a non-PFC psu that is consuming 200W of active power. Apparent power is 330W. PSU is dissipating 50W of heat, while additional 130W of heat is dissipated in mains wires coming to your house and into the PSU.
You say if you add APFC to this PSU apparent power will be converted into active power so not the electric company, but customer pays for it.
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Re: Belkin 12v 1A switching router PSU adaptor
On switching adaptors, the voltage is usually regulated. That means output voltage is close to 12v no matter if you put 1A of load on it or leave it unloaded. Linear (non switching) are usually unregulated. That means the voltage of unloaded 12v linear adaptor will be higher than 12v (I mostly see 17-18v) and will fall down to 12v when loaded. Another thing to watch for on different adaptors (this applies for switching and linear) is polarity on the output connector.
You can also tell an adaptor is switching or linear...Leave a comment:
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Re: PC Restarting/ Shutting off abruptly.
New PSUs WITH APFC nowadays go up to 90% efficiency.
And if APFC were so inefficient the rest of PSU would need to be over 100% efficient to cover it up for APFC and to still achieve 90% as a whole PSU (probably even to get 80%).
Also, most of people here agreed that with you 20 or more posts before. No need to say it again....Leave a comment:
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Re: Konig CMP-PSUP450W
The irony is that almost every powmax/leadman uses single transistor forward with a uc384x pwm chip....Leave a comment:
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Re: Antec SL450P Smart Power Exploded!
If making Toasty happy isn't so important to you
, it's a good idea to put a standard lightbulb in series with the power supply at the mains input. If something shorts out the mains, the lightbulb will just light up and there wouldn't be so much damage to the psu.
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Re: AC on DC side of PSU?
I think this is leakage current through Y filter caps in psu's input filter. Y caps are connected between line and ground and neutral and ground. If you would have your house grounded, this leaking current would go into the ground. The current is very small and I think it's nothing to worry about (except your not grounded house
).
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Re: suggestions for a cheap but sturdy case
I was looking at Casing Macron's website and saw that the intrerior of one of their cases is the same as Cooler Master's Elite 33x series. The front panel is different, though. See for yourself:
[url]http://www.coolermaster.com/product.php?category_id=19&product_id=31[/url]Re: suggestions for a cheap but stur...same as Cooler...Leave a comment:
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Re: K.i.s.s.
Where would you put Jamicon between those?...Leave a comment:
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Re: HP DPS-340CB A - lots of smoke!
If you have a scope, you can test APFC control ic if you bring the supply voltage to vcc pin and check if you get any pulses on the mosfet drive pin(or output or whatever it's called).Leave a comment:
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Re: the gutless, bloated, and fried power supply hall of shame
This is on secondary side, so I think it's a rectifying diode for 5vsb. Still not clear how it works on primary, though.Leave a comment:
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Re: the gutless, bloated, and fried power supply hall of shame
How is this powsun(leadman) working btw? It doesn't have 5vsb transformer, so everything must be on one transformer? And I don't see 5vsb switching transistor or ic. That would mean all rails are turned on all of the time?
edit: There is an ic on primary side, but I believe it's a pwm controller.Last edited by mur; 05-15-2010, 10:23 AM.Leave a comment:
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Re: Antec SL450P Smart Power Exploded!
I would check the APFC mosfet. I think it's quite a common failure in those psus. This is also what failed in my truepower 380w which has identical APFC board. I replaced it with another mosfet. When plugged in, +5vsb came on fine. When I shorted the ps-on with the ground the fuse immediately blew and replacement mosfet was shorted. Than i just replaced the wires that go to the PFC board with bridge rectifier. Psu worked fine. If you omit the PFC circuit like that, you would probably also need to increase primary caps capacitance.Leave a comment:
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Re: COMPUSA 250 watt ATX power supply
What is the switcher's part number?...Leave a comment:
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Re: Choosing resistors for loading
Just found this:
[URL]http://www.chirio.com/electronic_load.htm[/URL]
google translate helps
[url]http://translate.google.com/translate?js=y&prev=_t&hl=en&ie=UTF-8&layout=1&eotf=1&u=http://www.chirio.com/electronic_load.htm&sl=it&tl=en[/url]
I think this is a very cool load tester. But to test pc supply you would need to have at least 3 of those loaders to load all rails. Go check it outRe: Choosing resistors for loading<b...load.htm[/URL]Leave a comment:
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Re: Sum-vision KY-550ATX inrush current limiter
Yep it's very definitely blown. You can see few burned resistors around 5vsb circuit and the big 5vsb transistor was shorted and the small 5vsb transistor blew itself in half. Oh and look at the bottom of c19 cap(5vsb filtering).Leave a comment:
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