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How many amps do I need with my setup ?


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#1 playboidee

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Posted 13 January 2009 - 02:13 PM

I recently upgraded my computer with a new Power Supply, Memory, CPU Fan, and case fans. But suddenly, my computer would just shut down on its own. I then would have to turn off the PSU and wait a few mins before turning it back on to get it to boot up. At first, I thought maybe my CPU was overheating but I got a utility tool that monitors this and the CPU stays between 40C - 60C when idling or watching movies/listening to music. So my next thought was the PSU. I placed my old PSU I had at first and everything works fine, but I would like to still buy a better PSU.

Well after days of researching, I concluded that new power supply I bought doesnt have enough amps on the 12V rail. So my question is how many amps would be suitable for my PC?

My PSU I purchased (no name?) - Rhino Panter 450W - LINK

Input Voltage: 115/230 V

Output: +3.3V@20A, +5V@26A, +12V@20A,
-12V@0.5A, -5V@0.5A, +5VSB @ 2.0A

My Old PSU (currently using) is a 380W. And I believer the 12V has an amp rating of 26A. But not sure.

Comp Specs:

Intel D915GAV Motherboard (Onboard Video/LAN)
Intel P4 3.8GHZ Processor (Single Core)
2GB DDR 333MHZ Memory
3 SATA Hard Drives (80GB, 400GB, 500GB)
2 SATA DVD/CD Drives
4 Case Fans (1 140MM, 3 120MM)
2 USB Devices (Printer, Wireless Keyboard/Mouse)

Thanks for any info.

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#2 hamluis

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Posted 13 January 2009 - 02:47 PM

May be useful:

ASUSTeK Computer Inc.-Support-Min Power Supply Calculator - http://support.asus.com/PowerSupplyCalcula...SLanguage=en-us

Is It My Power Supply - http://www.bleepingcomputer.com/forums/t/169618/is-it-my-power-supply/

How To Test Your Computers Power Supply (PSU) - Video - http://www.metacafe.com/watch/729606/how_t...wer_supply_psu/

Power Supply Calculator - http://extreme.outervision.com/PSUEngine

Louis

#3 playboidee

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Posted 13 January 2009 - 03:16 PM

Thanks for the links, but...


May be useful:

ASUSTeK Computer Inc.-Support-Min Power Supply Calculator - http://support.asus.com/PowerSupplyCalcula...SLanguage=en-us

I've used plenty of PSU Calculators and none of them show the "amps" needed.

Is It My Power Supply - http://www.bleepingcomputer.com/forums/t/169618/is-it-my-power-supply/

I know its not my power supply because it still powers up everything.

How To Test Your Computers Power Supply (PSU) - Video - http://www.metacafe.com/watch/729606/how_t...wer_supply_psu/

Same as above.

Power Supply Calculator - http://extreme.outervision.com/PSUEngine

This might be something useful, but I refuse to pay for that info when I could get it free. Its not the price, its the principal.

Louis


My Power Supply works, it just shuts down to which I'm thinking its because it overloads. So I just need a new Power Supply which has enough amps on the 12V rail to satisfy all my components.

#4 dpunisher

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Posted 13 January 2009 - 04:12 PM

That Rhino is garbage. If it actually put out what it was rated at you would have no problems. 240 watts should be enough for your system, not ideal, but enough.

Here is likely the best deal out there now: http://www.newegg.com/Product/Product.aspx...N82E16817139008 39.99 AR 30 amps on the 12V rail.

I am a retired Ford tech. Next to Fords, any computer is a piece of cake. (The cake, its not a lie)

3770K @4.5, Corsair H100, GTX780, 16gig Samsung, Obsidian 700 (yes there is a 700)


#5 playboidee

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Posted 13 January 2009 - 05:43 PM

That Rhino is garbage. If it actually put out what it was rated at you would have no problems. 240 watts should be enough for your system, not ideal, but enough.

Here is likely the best deal out there now: http://www.newegg.com/Product/Product.aspx...N82E16817139008 39.99 AR 30 amps on the 12V rail.


Thanks, seems like I need to spend a little more to get better quality PSU.

Follow up question:

Is a single 12V rail with a higher amp rating better than a 2-3 12V rail with lower amp ratings?
Which is better?

#6 dpunisher

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Posted 13 January 2009 - 09:47 PM

I am a single rail convert. No use in having separate rails anymore IMHO (unless you have a huge PSU). More than a few of the "multirail" PSUs actually have a single rail shared anyway. Less hassle, just plug it in and go. Can't say it enough, but here are some good PSU reviews: http://www.jonnyguru.com/index.php

I think you already figured out that it is better to pay attention to the 12V rail vs total power output. Lots of cheap supplies have big numbers on the 5V and 3.3V but skimp on the 12V which is what modern systems need.

Edited by dpunisher, 13 January 2009 - 09:53 PM.

I am a retired Ford tech. Next to Fords, any computer is a piece of cake. (The cake, its not a lie)

3770K @4.5, Corsair H100, GTX780, 16gig Samsung, Obsidian 700 (yes there is a 700)


#7 playboidee

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Posted 14 January 2009 - 04:09 PM

I am a single rail convert. No use in having separate rails anymore IMHO (unless you have a huge PSU). More than a few of the "multirail" PSUs actually have a single rail shared anyway. Less hassle, just plug it in and go. Can't say it enough, but here are some good PSU reviews: http://www.jonnyguru.com/index.php

I think you already figured out that it is better to pay attention to the 12V rail vs total power output. Lots of cheap supplies have big numbers on the 5V and 3.3V but skimp on the 12V which is what modern systems need.


Ya, before I would just go with total watts. What I've been reading up on PSU's explains alot of problems I've had in the past with friends'/relatives' computers.

I appreciate those links you recommended for Power Supplies, but I kinda need one before this weekend so I've been looking around at stores in my area to find a decent one.

Hows this PSU? - Silverstone SST-ST56ZF 560W Power Supply

Fry's Link

Manufactuer Link

I know its probably more Wattage than I need, but plan to add a PCI-E card in the future. And perhaps get a Dual-Core system going within the next few months.

Edited by playboidee, 14 January 2009 - 04:26 PM.


#8 tg1911

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Posted 14 January 2009 - 08:01 PM

Silverstone, makes quality PSU's.
MOBO: GIGABYTE GA-MA790X-UD4P, CPU: Phenom II X4 955 Deneb BE, HS/F: CoolerMaster V8, RAM: 2 x 1G Kingston HyperX DDR2 800, VGA: ECS GeForce Black GTX 560, PSU: Antec TruePower Modular 750W, Soundcard: Asus Xonar D1, Case: CoolerMaster COSMOS 1000, Storage: Internal - 2 x Seagate 250GB SATA, 2 x WD 1TB SATA; External - Seagate 500GB USB, WD 640GB eSATA, 3 x WD 1TB eSATA

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