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 Post subject: PSU replacement
 Post Posted: Sat Dec 02, 2017 7:18 pm 
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Thinking of getting a PSU replacement for my Wife's old pc. It has a Corsair cx430 in it currently. She's had a problem recently where it blue-screened and restarted. Blue screen error was related to the video drive. I updated the driver. However I looked in event view and there was a different problem that was labeled as "warning" related to the "Amd northbridge". Cleared all dust out of pc. Re-seated the graphics card. Looked for bulges in the capacitors, but have not seen any. I'll get the details on the warning from event viewer when I can.

Anyway, the PSU is so old I can't even find where I purchased it in any of my online accounts. So I'm thinking of just getting a new one.

I was looking at this Seasonic which looks pretty nice. What do you think?.


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 Post subject: Re: PSU replacement
 Post Posted: Sat Dec 02, 2017 10:49 pm 
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I wouldn't replace a power supply unless the existing one failed, and I'm not sure that is what happened here. Scott.


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 Post subject: Re: PSU replacement
 Post Posted: Sun Dec 03, 2017 12:58 pm 
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Well I could always replace it and have the one in there now for a "known good spare". She hasn't had any problems with any blue screens since I uninstalled and reinstalled the video driver. I could wait and see if there are any other problems of course but I do like to have new parts. For instance with HDD, when HDD were more popular than SSD, I believe you recommended to replace them every so many years instead of waiting till they failed. This is how I'm leaning with the PSU of this pc. I'm guessing with HDD that recommendation is just to prevent data loss. The PC in question is pretty old but still works fine for what she uses it for. Just browsing the internet and some silly games. Also once in a while she is allowed by her job to work from home and uses SingleComm to take calls for a call center.


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 Post subject: Re: PSU replacement
 Post Posted: Sat Apr 21, 2018 10:42 pm 
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Well I did end up replacing it anyway. My New PSU I have questions about though. Shouldn't I be able to feel the air exhaust out of the back of the PSU?. I don't. Absolutely nothing at all. The old Power Supply I could feel air exhaust out the back of it. I don't think I've ever had a power supply where I could not feel air coming out from the back of it.


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 Post subject: Re: PSU replacement
 Post Posted: Sat Apr 21, 2018 11:40 pm 
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I contacted Seasonic about it and they say as long as the fan spins than there is nothing wrong with power supply. Another question I had on mounting I looked up...I always thought that the power supply fan, it's function was to help cool the pc somewhat. Most of what I've read online says the same thing. You always face the power supply fan towards the motherboard because it draws or sucks hot air out of the system thought the power supply and out the back of the system. The guy from Seasonic is telling me that the only reason that you would point the power supply fan at the motherboard is that you don't have vents in the other directions. In other words the only function of the Power Supply fan is to cool the power supply. The fan should face up or down depending on where you have a vent on the case, so the fan can draw cooler air from outside the case into the power supply to cool it.

What do think about this Scott?. If this is true could write more about it in the next book?. I've not been able to find anything that says anything close to what the guy from Seasonic is saying to me.


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 Post subject: Re: PSU replacement
 Post Posted: Sun Apr 22, 2018 1:01 pm 
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Many systems don't have chassis fans and as such do rely on the PSU fan to cool the chassis as well as the PSU. It doesn't matter where the PSU fan is physically "pointed" as long as it is installed with the airflow in the direction that the case is negatively pressured, that is the air should be entering the PSU from inside the chassis and flowing out the external vents in the PSU.

I previously had much more information on system cooling in the chapter on overclocking and cooling that was included in the 16th through 18th editions. Unfortunately due to new material and the inability to add to the page count it was removed from the 19th and later editions.

For more information I highly recommend reading the detailed documents on chassis thermal design published by Intel, here are a few of them:

http://www.formfactors.org/developer/sp ... tds_10.pdf
https://web.archive.org/web/20120519074 ... _62086.pdf
https://www.intel.com/content/dam/suppo ... -guide.pdf


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 Post subject: Re: PSU replacement
 Post Posted: Sun Apr 22, 2018 1:26 pm 
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That is what I always thought Scott- That you were meant to point the power supply fan towards the motherboard and as such it would draw the hot air out of the case into the power supply and out the back vents of the power supply.

What the guy said to me through email was that if you have a case with a vent on the bottom of it you should have the power supply fan pointed towards the vent so it will draw cool air from the outside of the case and into the power supply. He said it's not efficient to have it drawing in hot air from inside the case because that will just make the power supply hotter. He was indicating that the sole function of the power supply fan is to cool down the power supply and has nothing to do with cooling the pc.


I don't think I can tell you word for word what he said though but maybe just this part I can quote,

Quote:
This email may contain information which is privileged and confidential and intended solely for the person or organization to which it is addressed. If you are not the intended recipient, you must not copy, distribute or disseminate the information or take any action in reliance of it. Any views expressed in this message are those of the individual sender, except where the sender specifically states them to be the views of Seasonic Electronics Co., Ltd. and its affiliates. If you have received this message in error, do not open any attachment but please notify the sender (above) and delete this message from your system. Please rely on your own virus scanner; no responsibility is taken by the sender for any damage.


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 Post subject: Re: PSU replacement
 Post Posted: Sun Apr 22, 2018 6:03 pm 
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The question still remains, Shouldn't I be able to feel air blowing out of the back of the power supply regardless of the speed of the fan?. In my mind I would think some kind of force or wind should be perceptible.


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 Post subject: Re: PSU replacement
 Post Posted: Tue Apr 24, 2018 7:42 pm 
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I can't comment on "feel". If the fan is spinning then either the air is going in or out and it should be going out! Scott.


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 Post subject: Re: PSU replacement
 Post Posted: Tue Apr 24, 2018 9:21 pm 
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Right, that's why I'm a bit concerned. The air has to be going somewhere. If it's being sucked in by the fan and doesn't come out the back, it could be just because of poor design or something isn't right with the fan. Kind of want to get a different brand and return this. Then again it could be the fan only spins when the pc is first started up for awhile and then goes off during normal operation. It speeds up, slows down, or goes off completely based on "load" and PSU temp. The only reason I know it is or was spinning is because I took the side panel off and started it up on my kitchen table to check if it was actually spinning.

I saw in your book that Seasonic is one of the brands you do recommend. Guess I'll just let it be for now.


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 Post subject: Re: PSU replacement
 Post Posted: Thu May 03, 2018 5:36 pm 
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Well I went to put in my new "refurbished" Pc power & cooling PSU and noticed the 20 pin part of the power connector is broken it seems. More negatives for pc power and cooling

Image


Image

Noticed this AFTER I secured it all in the case. Kind of a pain in the butt putting it in with this case. They said they would ship me out another one tomorrow. Hope that one isn't broken also. Maybe I'll get a Corsair at this point.


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 Post subject: Re: PSU replacement
 Post Posted: Thu May 03, 2018 5:40 pm 
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I mean it might still technically "work" but the one I sent them in was less than a year old and didn't have any issues like that. Should I trust it and connect everything up and try it out?. I don't think I should. What do you think Scott?. Kind of makes me wonder about these guys and weather or not they are trustworthy anymore. I called and they said they would ship another out tomorrow but no apology or anything....


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 Post subject: Re: PSU replacement
 Post Posted: Thu May 03, 2018 7:32 pm 
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The pictures don't show anything clearly. Let me know what you decide in the end. Scott.


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 Post subject: Re: PSU replacement
 Post Posted: Thu May 03, 2018 7:47 pm 
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I can see them pretty clearly. Did you click on each picture to enlarge them? I'm holding the 20 pin connector in between my thumb and index finger. There is a break or hole on the side of the connector.


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 Post subject: Re: PSU replacement
 Post Posted: Fri May 04, 2018 6:30 pm 
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I believe the "break" or "hole" you speak of is an attachment point for the 4-pin connector to combine the 20 and 4-pin connectors to make a modern 24-pin connector. Unfortunately the pictures are not clear or close enough to accurately say anything more than that. Scott.


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 Post subject: Re: PSU replacement
 Post Posted: Fri May 04, 2018 6:36 pm 
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I guess I'll have to get a better camera, or learn to take better pictures. There is definitely a hole where there should not be one. Either way, they are shipping another PSU and it went out today. To connect the extra 4 pins there are little "nubs" on each side of the 4 pin connector that just slide under the little plastic edges on the 20 pin connector. The "hole" that I'm describing you should be able to see if you look at the red wire or wires where they go into the plastic connector.


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 Post subject: Re: PSU replacement
 Post Posted: Fri May 04, 2018 6:44 pm 
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I think I'll try and take some better pictures when I get the new one to compare.


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 Post subject: Re: PSU replacement
 Post Posted: Mon May 21, 2018 4:25 pm 
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It's a shame that Firepower Technology is selling it's products with the Pc Power & Cooling name. They aren't the same company and the products they sell are inferior to almost all of their competitors.


Last edited by FatGuy on Sun Jun 03, 2018 8:32 pm, edited 1 time in total.

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 Post subject: Re: PSU replacement
 Post Posted: Sat May 26, 2018 10:09 pm 
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Still, I am weary of putting this "refurbished" PSU in my computer. Am I correct in thinking that refurbished could just mean that Firepower Technology checked if the power supply unit turned on and if so, "it works" and is "refurbished". In your opinion, would you trust something like this in your own computer?. Scott am I being unreasonable here?. Or am I right to worry about this?

I can always get a Seasonic PRIME Ultra 750W 80+ Titanium Power Supply, Full Modular, 135mm FDB Fan w/Hybrid Fan Control, ATX12V & EPS12V, Power On Self Tester, SSR-750TR for about $10 than I paid for the Silencer 750.

I can also get CORSAIR RMx Series RM750x (CP-9020179-NA) 750W ATX12V / EPS12V 80 PLUS GOLD Certified Full Modular Power Supply which has much better reviews than the Seasonic that I linked and cost less money. Plus it has a 10 year warranty and with the warranty/rma service I've received from Corsair in the past few months I've been really impressed with them.

Firepower technology on the other hand is virtually unheard of today and the power supplies they sell today can easily compete against products sold in 2012. Maybe they are better off sticking with making power supplies for proprietary oem replacements.

I don't know Scott though. Really really want your opinion on this because I trust it. Do you think FirePower Technology produces the same quality products that Pc Power & Cooling did?. The way that they shipped to me was disappointing also. A box only about 1/2 inch wider than the the psu itself. The body of the psu was wrapped in a plastic bag and then the cords attached were wrapped in rubber band. For the packing material they used one sheet of bubble wrap, enough to be wrapped once around the power supply unit. Like I've said before, even though there is no physical damage to the replacement for the replacement doesn't mean the PSU itself isn't damaged.

How will I know it's a damaged if it turns on and runs the pc?. Possibly some intermittent problems, but also I've read that some power supplies can damage other components when they die.


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 Post subject: Re: PSU replacement
 Post Posted: Sun Jun 03, 2018 9:25 pm 
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Maybe Firepower technology could get a contract to sell their power supplies here.


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 Post subject: Re: PSU replacement
 Post Posted: Fri Jun 15, 2018 9:42 pm 
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Both new cases have a vent with dust-cover on the bottom for bottom mounted power supplies.

Image


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 Post subject: Re: PSU replacement
 Post Posted: Fri Jun 15, 2018 10:28 pm 
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The Silencer 750 MKIII doesn't even meet the minimum Hold up time. Voltage regulation is also poor compared to most other power supply units

Page 20 says it's now 17ms


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 Post subject: Re: PSU replacement
 Post Posted: Sun Jun 17, 2018 7:26 pm 
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dBa Pc Power & Cooling

Quote:
Doing business as means that the company is working under a fictitious name, concealing its true identity.
- from here.


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