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PC not booting up after installing new 550W PSU but works fine on a stock 300W PSU

Last response: in Components
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January 10, 2014 5:56:33 AM

my rig
i5 2300
ram 6bg
graphics card gt 210(bought a 650ti boost to use with the new PSU)
500 gb WD HDD
the new psu-corsair vs 550
after the new psu is installed and the power button is switchched on,the fans run for 2 sec and then stop but a green led next to the cpu 4 pin connector still glows.i have checked my connections several times but ther seems no problem in the connectons
January 10, 2014 6:06:28 AM

I suggest testing the components outside the case. It might a short somewhere.
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January 10, 2014 6:11:43 AM

by components do u mean the cpu, mobo?i did check if the mobo had shorted using the stock 300 W psu and it had no problems,then i tried it using the new psu and the same problem repeated.is the new psu faulty or is there some other problem?
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January 10, 2014 6:15:31 AM

Ok. So you tried using the old PSU and your pc works fine. If your pc works fine with the old one and doesn't with the new one, clearly is a problem with the new one.
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January 10, 2014 6:25:37 AM

i read somewhere that the mobo has a feature which cuts off power to avoid spiking.is it one of those cases as i stepped up from a 300 W to a 550W psu?
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January 10, 2014 6:27:41 AM

Better clear cmos then.
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January 10, 2014 6:30:48 AM

how do i do that?and its just a guess maybe the psu is faulty.i have no idea
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a c 119 U Graphics card
January 10, 2014 6:39:40 AM

Check to see if the fan of PSU is spinning or not ! If not, RMA the PSU ASAP, its faulty. And VS 550 is not a trusted unit and not even 80+ certified.
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January 10, 2014 6:40:47 AM

how will clearing the cmos help?
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January 10, 2014 6:46:37 AM

lonewolf7 said:
Check to see if the fan of PSU is spinning or not ! If not, RMA the PSU ASAP, its faulty. And VS 550 is not a trusted unit and not even 80+ certified.


so you are telling me that even if i get the psu replaced it will have the same problems? the vs 550 did get good reviews so i went for it. :??: 
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a c 119 U Graphics card
January 10, 2014 7:09:55 AM

No. This unit maybe faulty so you might have to replace it. The replacement unit may not have the same issue. Did you find any good reviews from reputable site's like HARDOCP, JONNYGURU, or this forum. So what you have found with reviews doesn't count. Good luck.
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January 10, 2014 7:13:01 AM

Ghost69 said:
how will clearing the cmos help?


Check your motheboard's manual. You have a jumper on the motherboard. Better check the manual. It should tell you exactly what you need to do.
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a b U Graphics card
January 10, 2014 7:28:49 AM

Ghost69 said:
how will clearing the cmos help?
It won't. If the system works when you reinstall the old PSU and it doesn't with the new PSU, then there are only 2 possibilities:

1. The new PSU is defective;
2. The new PSU is not compatible with your motherboard (not very likely).

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January 10, 2014 7:42:13 AM

GhislainG said:
Ghost69 said:
how will clearing the cmos help?
It won't. If the system works when you reinstall the old PSU and it doesn't with the new PSU, then there are only 2 possibilities:

1. The new PSU is defective;
2. The new PSU is not compatible with your motherboard (not very likely).


psu not being compatible with mobo?can that happen?
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January 10, 2014 7:47:22 AM

In some cases, yes it's possible. Not in yours though.
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January 10, 2014 7:49:43 AM

hefox said:
Ghost69 said:
how will clearing the cmos help?


Check your motheboard's manual. You have a jumper on the motherboard. Better check the manual. It should tell you exactly what you need to do.


does the bios modify every time a psu is changed? i don't think there is a POST problem as i am using the same pc with the stock psu right now.i may be wrong.i don't know
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January 10, 2014 7:58:37 AM

No, it doesn't but having the cmos cleared, will make your motherboard look for every components that's connected to it which will changed the power requirement for a second or so. You have nothing to lose if you try.
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January 11, 2014 4:18:39 AM

hefox said:
Ok. So you tried using the old PSU and your pc works fine. If your pc works fine with the old one and doesn't with the new one, clearly is a problem with the new one.


one more question and it might sound dumb,but the psu was in good factory packaging.How could it turn out to be faulty?
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January 14, 2014 11:37:58 PM

Hey guys' I bought a Corsair TX550M. I thought it was faulty. I tried the "paperclip" test. The fan worked! But, whenever I connect it to my computer. It wont POST. I wonder why. Do I need to do the CMOS thingy that was mentioned here? Or what?
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January 15, 2014 12:31:33 AM

Try taking out the ram memories and see if your motherboard makes any beeps.
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January 15, 2014 11:34:35 AM

I haven't tried that one yet. Do I need to do that tho? Cos whenever I put back my old PSU, my system works just fine.
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a b U Graphics card
January 15, 2014 1:06:18 PM

Then you already know what the issue is.
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January 15, 2014 2:28:08 PM

So, eventho the PSU is working using the Paperclip but not on my system, it is still Faulty???
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a b U Graphics card
January 15, 2014 4:04:36 PM

Unless your old PSU is better and more powerful, then the new one has to be defective.
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January 15, 2014 6:29:16 PM

GhislainG said:
Unless your old PSU is better and more powerful, then the new one has to be defective.


Im using an HP stock 460 watts PSU. I just want to upgrade cos I recently bought an HD 7770 which has a 450 watts req.

Is my old PSU enough? Or I shud upgrade?
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a b U Graphics card
January 15, 2014 7:24:59 PM

With that GPU, the old PSU should be fine. Read this review http://www.legitreviews.com/gigabyte-radeon-hd-7770-oc-... where the whole system draws less than 250W at the outlet with an HD 7770. Your system may draw more power, but you haven't provided any info. The PSU recommendation is just in case a buyer has a really crappy PSU that delivers much less power than its rating. What are the specs of the PSU in your HP system?
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January 15, 2014 8:39:04 PM

GhislainG said:
With that GPU, the old PSU should be fine. Read this review http://www.legitreviews.com/gigabyte-radeon-hd-7770-oc-... where the whole system draws less than 250W at the outlet with an HD 7770. Your system may draw more power, but you haven't provided any info. The PSU recommendation is just in case a buyer has a really crappy PSU that delivers much less power than its rating. What are the specs of the PSU in your HP system?


Here is the full specs of my PC.
With the 7570 upgraded to 7770...

http://h20565.www2.hp.com/portal/site/hpsc/template.PAG...
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January 15, 2014 9:32:14 PM

so, what do u guys think? do I need to upgrade?
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a b U Graphics card
January 16, 2014 4:53:33 AM

No, but do you want to?
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January 16, 2014 7:30:21 AM

As long as your old psu has one 6 pin cable for the new video card, you're fine with the old psu. If you new PSU starts, doesn't mean it's working properly. I had a defective psu that it was booting fine until the video card (which was entry level) was starting to be use by windows and then the system was freezing. Without the video card, the psu was fine, booting properly in windows with the onboard video card. So the paperclip test it only does half of the job.
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January 16, 2014 8:51:04 AM

GhislainG said:
No, but do you want to?


hmm.. I honestly don't. that is why I only bought an HD 7770..
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January 16, 2014 8:53:16 AM

hefox said:
As long as your old psu has one 6 pin cable for the new video card, you're fine with the old psu. If you new PSU starts, doesn't mean it's working properly. I had a defective psu that it was booting fine until the video card (which was entry level) was starting to be use by windows and then the system was freezing. Without the video card, the psu was fine, booting properly in windows with the onboard video card. So the paperclip test it only does half of the job.


It actually has one 6 pin..

ok now, I understand! It needs to completely boot and work fine when connected to the mobo and the others..

ill just return the PSU and forget about it.. :) 

THANKS GUYS!
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!