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Pc does not power up at first try.

None of those links work. It's most likely bad capacitors.
- davC
- Post #7
- Sep 6, 2014
- Forum: Power Supplies
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Which one to keep

Doesn't really matter. Both those systems would be fine with a good 400W PSU, so it's up to you. I'd keep the Seasonic
- davC
- Post #3
- Sep 6, 2014
- Forum: Power Supplies
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Rosewill PSU, dead or just my motherboard?

That's a rebadged Solytech. It's actually not that bad. The fan is supposed to spin slow, it's big, and the PSU has a thermal fan controller. How old is your motherboard?
- davC
- Post #5
- Sep 6, 2014
- Forum: Power Supplies
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PSU urgent help!!

It might work under light load but I would not recommend it at all. It probably has a fast recovery diode pack for the 12V which would get overloaded under heavy load and if it blew it would probably kill some components. Pretty much any PSU you find now-a-days will be better than that one.
- davC
- Post #3
- Jun 24, 2013
- Forum: Power Supplies
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How often do you guys replace/upgrade your PSU?

^ and that VX450 is still going strong because it uses all Japanese capacitors ;)
- davC
- Post #30
- Jun 22, 2013
- Forum: Power Supplies
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First Time PSU HELP !!!

You're fine. That PSU is even overkill for your setup
- davC
- Post #4
- Jun 22, 2013
- Forum: Power Supplies
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Troubleshooting no power

When the PSU is plugged into the mobo and off, what DC reading do you get on the purple wire of the main motherboard connector?
- davC
- Post #6
- Jun 21, 2013
- Forum: Power Supplies
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How often do you guys replace/upgrade your PSU?

Very true. Cheap Chinese caps and sleeve bearing fans seem to fail quickly. Even if a PSU is brand new and doesn't have Japanese capacitors, I instantly replace them all. But then again it depends on the design. Crappy CapXon caps are going to last a lot longer in a two transistor forward...
- davC
- Post #28
- Jun 21, 2013
- Forum: Power Supplies
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New build think this PSU can handle it?

That PSU will do its rated wattage and handle that rig no problem. Only issue is the reliability of the capacitors. It's made by FSP so it uses almost exclusively CapXon capacitors which are not reliable at all, they're pretty much designed to last past the warranty. I had that PSU and the PFC...
- davC
- Post #5
- Jun 21, 2013
- Forum: Power Supplies
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Compatibility with AM3+

It's marketing. There's no way for a PSU to "detect" what CPU it's powering, so it will work. Keep in mind that you do not need that much wattage for CF 7950's. You could use a 650W PSU and still have headroom. My setup has a 2500K OC'd to 4.4GHz, and a 7950, when playing Crysis 3, my setup...
- davC
- Post #3
- Jun 21, 2013
- Forum: Power Supplies
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Ult-350p?

That is a unit built by Wintech, which I believe are out of business now. Thing is, the 350 rating is rated for peak wattage not continuous. That being said, your setup there doesn't require that much power and would be fine. One thing though is yes the capacitors it uses will be a mix of...
- davC
- Post #4
- Jun 21, 2013
- Forum: Power Supplies
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Looking For New PSU

I have that exact PSU and it also stopped working (stand by but won't power on) It's just a rebranded Apevia unit, it won't do its rated wattage but it isn't a terrible power supply. Although, I recommend the one that biostud linked in his post. That is an AWESOME unit and will have no...
- davC
- Post #3
- May 22, 2013
- Forum: Power Supplies
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Corsair CX430 430w with an i7 3770k, 5850, etc? beyond the limit of psu?

You're fine. I've ran an OC'd Core i3 4.2GHz (First gen) with an OC'd 4870 and it's had no issues. Only thing to worry about is the unreliable capacitors in the CX430. It probably has CapXon or Samxon GF, which are notorious for premature failures
- davC
- Post #6
- May 22, 2013
- Forum: Power Supplies
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HEC Orion 485W PSU Review

I realize that. It still sells on Newegg so people may still be curious
- davC
- Post #13
- May 21, 2013
- Forum: Power Supplies
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Confused with 12v rails.....

Yes that PSU actually has a single rail capable of ~25A. Your system will never pull more than 175W (including inefficiency) as it is, and that is a well built PSU so you would be good to go
- davC
- Post #9
- May 21, 2013
- Forum: Power Supplies
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TOPOWER TP-1687BB-300 w/300 watt power supply - Good enough?

That PSU is garbage, it has a Topower UL number but it was built by Leadman. It is a horrible power supply that won't be able to do its wattage, and will have insanely high ripple, and the fans are loud regardless of having a fan controller, and the fans barely have any grease in the bearings...
- davC
- Post #3
- May 21, 2013
- Forum: Power Supplies
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Confused with 12v rails.....

Oh I had those same specs in an old Gateway machine. That thing hardly pulls any power, you don't need a 500W PSU for that setup and I can assure you that you don't need 22A on the 12V for that system to run. A high quality 300W PSU could run that, honestly and have power to spare... You could...
- davC
- Post #6
- May 21, 2013
- Forum: Power Supplies
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Ripple when you first get your PSU vs after 5 years of use?

Over time the ESR starts to rise in the capacitors, and capacitance usually goes down. I believe that PSU uses Chemi Con caps which are extremely reliable. I don't think you have anything to worry about. I would guess that the fan would quit before those caps do. If anything, the output...
- davC
- Post #4
- May 21, 2013
- Forum: Power Supplies
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Confused with 12v rails.....

It's a Codegen, so they probably lied and it's most likely a single rail unit with a 20A rectifier. Does it have 2 seperate groups of 12V wires going to the PCB, and does it have any shunts connected to those groups? At best it might have 2 rectifiers in parallel for the 12V which would still...
- davC
- Post #3
- May 21, 2013
- Forum: Power Supplies
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HEC Orion 485W PSU Review

Those caps are in a voltage doubler configuration, so the combined usable capacitance is that of the caps, 470uF, completely inadequate for a "485W" PSU. Ideally, you would want 820uF caps there but it doesn't matter since this is basically just an average 300W PSU. That thing would need 100%...
- davC
- Post #11
- May 21, 2013
- Forum: Power Supplies

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