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Old 02-22-2013, 11:14 PM   #1
Borg20001
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Default Replacing a blown 12V ATX 500W PSU

I have an AMD dual core cpu and it had an old Dnyex DX-PS500W PSU that started to give off a burning smell before it "popped" and had a blue flash and then died.

I pulled the plug on it when it popped and flashed and then removed it. Cleaned out the PC of any dust etc. (There wasn't very much as the case has 3 fans).

I grabbed an older 550 Watt 12V ATX PSU from an older pc and plugged it all in and the system is up an running again.

But I'd like to keep this going so I wanted to get a new replacement PSU for the dual core pc.

Without breaking the bank (as this is an older system) I was looking for recommendations from the experts here for a replacement ATX 12 V PSU. I'm not sure what other details you need but I'd appreciate any recommendations. I'm trying to keep the price under $50 if I can without compromising too much in quality.

Can anyone give me any advice?

TIA.
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Old 02-23-2013, 01:05 AM   #2
lehtv
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Can you give a more detailed list of specs. CPU model, motherboard, graphics card, how many SATA devices?
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Old 02-23-2013, 03:59 AM   #3
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Something like this Corsair CX430 watt should be plenty for a dual core CPU. Nice efficient Bronze rating too.
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Old 02-23-2013, 08:27 AM   #4
Borg20001
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Quote:
Originally Posted by lehtv View Post
Can you give a more detailed list of specs. CPU model, motherboard, graphics card, how many SATA devices?
MB = Gigabyte GA-MA770-S3
CPU = AM2+ AMD 770
Memory 2GX2 A-Data ADQVE1B16K
Graphics card = nVidia Gforce 9800 (I forgot the brand and didn't write it down)

I have 2 SATA HD's running on it and that's it I think.

Appreciate the help.
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Old 02-23-2013, 08:29 AM   #5
Borg20001
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Quote:
Originally Posted by Blastman View Post
Something like this Corsair CX430 watt should be plenty for a dual core CPU. Nice efficient Bronze rating too.
I was looking at that but wasn't sure if 430W would work since the original was a 500W PSU - I'm not that savvy on the tech details so I appreciate the feedback.
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Old 02-23-2013, 08:41 AM   #6
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if ya don't mind rebates:

http://microcenter.com/search/search...a-Micro-Center
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Old 02-23-2013, 09:19 AM   #7
lehtv
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Quote:
Originally Posted by Borg20001 View Post
CPU = AM2+ AMD 770
That's the chipset, not the CPU. Based on it, I'm assuming the CPU is an Athlon II X2 or Phenom II X2.

Quote:
Graphics card = nVidia Gforce 9800 (I forgot the brand and didn't write it down)
9800 series includes various cards with different power requirements.

9800 GT - requires one 6-pin power connectors - 400W unit needed
9800 GTX/GTX+ - requires 2x6-pin connectors - 500W unit needed
9800 GX2 - requires 6-pin + 8-pin connectors - 500W unit needed

This is pretty much the only sensible option at current prices: Corsair CX500 ($30 AR AP today) - 2x 6+2 pin
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Last edited by lehtv; 02-23-2013 at 09:22 AM.
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Old 02-23-2013, 10:36 AM   #8
Borg20001
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Quote:
Originally Posted by lehtv View Post
That's the chipset, not the CPU. Based on it, I'm assuming the CPU is an Athlon II X2 or Phenom II X2.

9800 series includes various cards with different power requirements.

9800 GT - requires one 6-pin power connectors - 400W unit needed
9800 GTX/GTX+ - requires 2x6-pin connectors - 500W unit needed
9800 GX2 - requires 6-pin + 8-pin connectors - 500W unit needed

This is pretty much the only sensible option at current prices: Corsair CX500 ($30 AR AP today) - 2x 6+2 pin

Thanks Lehtv,

As you can see, my lack of tech-savvy shows. I had written down the chipset but thought it was the cpu. You did list the correct cpu though, I'm pretty sure it is an Athlon II X2. Regarding the graphic card, I think it is the 2nd one GTX. I know that I have two power leads connecting to it from the PSU. So the Corsair looks like the winner. thanks again to everyone for their advice and help with this.
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Old 02-23-2013, 03:21 PM   #9
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Great, happy to help
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Old 02-23-2013, 07:43 PM   #10
Blastman
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That Dnyex DX-PS500W is rated

+12v1 15A
+12v2 18A

… so total 33A on the 12v.

The CX430 has a 32A rating on the +12v so it's rating is almost the same as the Dnyex. I don't know how good that Dnyex psu is (doesn't seem like a very good psu), but a lot of cheap psu's can't even pull their full wattage rating. That CX430 is a pretty decent psu and would pull its full wattage rating with ease.

You could step up to a 500W model for future proofing if you intend to build a new computer in the near future -- your call.
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Old 02-23-2013, 07:56 PM   #11
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Quote:
Originally Posted by Blastman View Post
That Dnyex DX-PS500W is rated

+12v1 15A
+12v2 18A

so total 33A on the 12v.

The CX430 has a 32A rating on the +12v so it's rating is almost the same as the Dnyex. I don't know how good that Dnyex psu is (doesn't seem like a very good psu), but a lot of cheap psu's can't even pull their full wattage rating. That CX430 is a pretty decent psu and would pull its full wattage rating with ease.

You could step up to a 500W model for future proofing if you intend to build a new computer in the near future -- your call.
There's only a few good oems, and rarely are cheap dynex, powmax, etc psus built by them. Those bad psus always overstate their capacity.

Antec earthwatts are delta units, so are a good suggestion in addition to the corsair builder series.
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