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PSU Rail Voltage Help

Last response: in Components
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November 4, 2012 12:45:47 PM

I'm looking at upgrading my rig, so i need a new psu. My current psu is at 300w
12v1 10A 12v2 12A
3.3v 20A 5vSb 2A
5v 16A -12v 0.5a

Now the power supply that i'm looking at is :COOLER MASTER eXtreme Power Plus RS500-PCARD3-US 500W ATX12V v2.3 Power Supply it's a 500w psu
+3.3V@22A, +5V@25A, +12V1@18A, +12V2@18A, -12V@0.5A, +5Vsb@2.5A

They all match up but the rails numbers are different. Ex:12v1 10A = 12v1 18A

Would this be a problem or purchasing it would be alright ?

Edit: I've heard that this series of PSU is bad, so i found another one
RAIDMAX RX-500AF Continuous 500 watts ATX 12V v2.3/EPS 12V SLI Ready CrossFire Ready 80 PLUS BRONZE Certified Power Supply

+3.3V@24A, +5V@24A, +12V1@20A, +12V2@20A, -12V@0.5A ,5VSB@2.5A

More about : psu rail voltage

November 4, 2012 1:40:29 PM

If I were you, I would go for a good Corsair PSU instead, the CX series isn't very expensive and are very good
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a c 137 ) Power supply
November 4, 2012 2:24:45 PM

The amps on individual rails is an artificial UL safety limitation.
What counts is the total amps available across all 12v rails.
Usually, with cheap psu's it will be less than the sum.

What will be in your upgrade that you think will demand extra power?
Can you give us more details?
300w is generally sufficient unless you will be adding a grophics card stronger than a 7750.
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November 4, 2012 3:21:28 PM

geofelt said:
The amps on individual rails is an artificial UL safety limitation.
What counts is the total amps available across all 12v rails.
Usually, with cheap psu's it will be less than the sum.

What will be in your upgrade that you think will demand extra power?
Can you give us more details?
300w is generally sufficient unless you will be adding a grophics card stronger than a 7750.


I was thinking of getting a HD 6850, On AMD's Site it says "500 Watt or greater power supply recommended" So i don't think i could get away with it. (I'm currently using a HD 6570 low profile)
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a c 137 ) Power supply
November 4, 2012 3:27:46 PM

Anything_ said:
I was thinking of getting a HD 6850, On AMD's Site it says "500 Watt or greater power supply recommended" So i don't think i could get away with it. (I'm currently using a HD 6570 low profile)


No, a 6850 needs more power than the pci-e slot can deliver. Namely a 75w 6 pin pci-e power connector.
Using molex to 6 pin adapters will not do the job.

The strongest card you can use without a psu upgrade would be a 7750.
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November 4, 2012 7:37:31 PM

geofelt said:
No, a 6850 needs more power than the pci-e slot can deliver. Namely a 75w 6 pin pci-e power connector.
Using molex to 6 pin adapters will not do the job.

The strongest card you can use without a psu upgrade would be a 7750.


I know that, That's why i was considering upgrading from this OEM PSU (Forgot to mention)
But will an "Antec NEO ECO 520C 520W Continuous Power ATX12V v2.3 / EPS12V 80 PLUS Certified Active PFC Power Supply " Do the job as k1114 suggested ?
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a c 137 ) Power supply
November 4, 2012 7:45:27 PM

Yes.
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November 4, 2012 9:32:16 PM

Best answer selected by Anything_.
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a b ) Power supply
November 4, 2012 10:55:07 PM

I would've went with the hive, but maybe prices are different for you.
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November 5, 2012 12:31:16 AM

k1114 said:
I would've went with the hive, but maybe prices are different for you.

I really don't have much money to spend on the PSU so the cheapest is the best for me. And thank you for the two suggestions.
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a b ) Power supply
November 5, 2012 2:39:37 PM

But the hive is cheaper for people in the US. $56 vs $56.98.
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