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Power requirements (AMPS on 12v rail) for Athlon x2 and Geforce 9400 GT

post #1 of 7
6/11/12 at 6:34pm
Thread Starter 
Hardware

Core System.
Athlon 64 x2 4200+
Gigabyte GA-MA78GM-S2H
Geforce 9400 GT
2 Sticks of DDR2-800 RAM
Opitcal Drive
1x SATA HDD
1x PATA HDD
2x 120mm case fans
PCI Creative Live 5.1 Soundcard

Extras
USB Mouse
USB Lexicon Omega Pro (Audio Interface)
USB m-audio keystation 49e (MIDI Controller, USB powered, no DC 12V)


I currently have a 500w supply that I was given that has the following specs.

PowerHousePc
PPH512TUV (MPT-251)
Output 500w max
+5v 25A
+12V 13A


Now what I want to know is, what is the minimum AMPS on the 12v rail I'd need for a system like the one above. My understanding is for a system like the one above, you'd need 18-20 AMPS on the 12V rail minimum.
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AMD Athlon 64 X2 4800+ Brisbane Gigabyte M52S-S3P AM2 (Rev 1.0) Asus Geforce 8600 GT 256MB Silent Corsair CM2X1024-6400C4 (2x1GB) (Running @ DDR2800 
Hard DriveOptical DriveOSMonitor
Seagate Baracuda 7200 - ST33206 Asus DRW-2014L1T Windows XP Home - 32-bit (SP3) SyncMaster 2493hm 
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Logitech Basic Zalman ZM600-HP (600 watts) Quay Computers Basic Logitech G5 
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post #2 of 7
6/11/12 at 6:36pm
About 12A honestly. Grab a Corsair CX430v2; not because you need 430W, but because it's one of the cheapest good PSUs on the market.
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post #3 of 7
6/11/12 at 6:55pm
Thread Starter 
EVGA list 18AMPS for their 9400 GT card.

"Minimum of a 300 Watt power supply
(minimum +12 Volt current rating of 18 amps)"
http://www.evga.com/support/faq/afmmain.aspx?faqid=58052
Main Rig
(13 items)
  		  
CPUMotherboardGraphicsRAM
AMD Athlon 64 X2 4800+ Brisbane Gigabyte M52S-S3P AM2 (Rev 1.0) Asus Geforce 8600 GT 256MB Silent Corsair CM2X1024-6400C4 (2x1GB) (Running @ DDR2800 
Hard DriveOptical DriveOSMonitor
Seagate Baracuda 7200 - ST33206 Asus DRW-2014L1T Windows XP Home - 32-bit (SP3) SyncMaster 2493hm 
KeyboardPowerCaseMouse
Logitech Basic Zalman ZM600-HP (600 watts) Quay Computers Basic Logitech G5 
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Main Rig
(13 items)
  		  
CPUMotherboardGraphicsRAM
AMD Athlon 64 X2 4800+ Brisbane Gigabyte M52S-S3P AM2 (Rev 1.0) Asus Geforce 8600 GT 256MB Silent Corsair CM2X1024-6400C4 (2x1GB) (Running @ DDR2800 
Hard DriveOptical DriveOSMonitor
Seagate Baracuda 7200 - ST33206 Asus DRW-2014L1T Windows XP Home - 32-bit (SP3) SyncMaster 2493hm 
KeyboardPowerCaseMouse
Logitech Basic Zalman ZM600-HP (600 watts) Quay Computers Basic Logitech G5 
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post #4 of 7
6/11/12 at 7:01pm
Trust me. wink.gif And in any case the PSU I recommended has 28A on the +12V so it's a moot point.
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post #5 of 7
6/11/12 at 7:05pm
Quote:
Originally Posted by Phaedrus2129 View Post

Trust me. wink.gif And in any case the PSU I recommended has 28A on the +12V so it's a moot point.

Listen to Phaedrus, he knows his stuff.
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ShadowForge
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Defiant
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CarbonCat
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CPUMotherboardGraphicsRAM
i7 3930K ASRock X79 Extreme6 Sapphire HD 6950 2GB Dirt3 Edition G.Skill 16 GB (4x4GB) DDR3 1600 Mhz 1.35v 
Hard DrivePower
Samsung 830 128 GB Seasonix X750 Gold 
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CPUMotherboardGraphicsRAM
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Hard DriveHard DriveOptical DriveCooling
WD Caviar Blue 250 2.5" Laptop Drive WD Caviar Black 1TB 3.5" Pioneer BDR-203 BluRay Burner Corsair H60 push 
OSOSMonitorPower
Windows 7 Pro x64 Ubuntu 11.10 Samsung 40" 60hz  ANTEC NEO ECO 520W 
CaseMouse
NZXT Gamma Microsoft Bluetooth Notebook Mouse 5000 
View all
CPUMotherboardGraphicsRAM
i7 - 2600k [5.0 1.42v] ASUS P8Z68 Deluxe Sapphire HD6950 2gb Dirt 3 Edition 8GB G.Skill DDR3 2133 CAS11 
Hard DriveOSMonitorKeyboard
60GB G.Skill Sniper + 2x1TB Spinpoint F3 Raid0 Win 7 Pro x64 ASUS VW266H Razer Blackwidow 
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post #6 of 7
6/12/12 at 1:36am
Thread Starter 
Thanks for the replies. But do you have an official article I can read on power supply requirements?
Main Rig
(13 items)
  		  
CPUMotherboardGraphicsRAM
AMD Athlon 64 X2 4800+ Brisbane Gigabyte M52S-S3P AM2 (Rev 1.0) Asus Geforce 8600 GT 256MB Silent Corsair CM2X1024-6400C4 (2x1GB) (Running @ DDR2800 
Hard DriveOptical DriveOSMonitor
Seagate Baracuda 7200 - ST33206 Asus DRW-2014L1T Windows XP Home - 32-bit (SP3) SyncMaster 2493hm 
KeyboardPowerCaseMouse
Logitech Basic Zalman ZM600-HP (600 watts) Quay Computers Basic Logitech G5 
View all
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Main Rig
(13 items)
  		  
CPUMotherboardGraphicsRAM
AMD Athlon 64 X2 4800+ Brisbane Gigabyte M52S-S3P AM2 (Rev 1.0) Asus Geforce 8600 GT 256MB Silent Corsair CM2X1024-6400C4 (2x1GB) (Running @ DDR2800 
Hard DriveOptical DriveOSMonitor
Seagate Baracuda 7200 - ST33206 Asus DRW-2014L1T Windows XP Home - 32-bit (SP3) SyncMaster 2493hm 
KeyboardPowerCaseMouse
Logitech Basic Zalman ZM600-HP (600 watts) Quay Computers Basic Logitech G5 
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post #7 of 7
6/12/12 at 1:39am
Quote:
Originally Posted by CokeMD View Post

Thanks for the replies. But do you have an official article I can read on power supply requirements?

The thing is, you don't want to go by just the amperage readings, as they don't really mean much. You have a "500w" unit (claimed), and it only shows 12a on the 12v rail. 12a x 12v (amps x volts = watts), that's only 144w that your PSU is capable of delivering, at MAXIMUM. Meaning it could easily blow with 100w sustained draw.

Getting something of quality is going to make a FAR better impact on your system's stability, and ability to NOT catch fire. Rather than just going in blind by the "amperage required by EVGA". A 9400GT is only like a 40-50w graphics card. It takes very little power to run it. Your x2 is probably a 95w processor.

Long story short, get the cheapest, good, reliable unit and you'll be fine. Currently, Phaedrus is correct, the Corsair CX430 is what you'd want.

Also, here's some very handy tools for you:

FAQ: Recommended Power Supplies (quality ones)
PSU Calc (which will tell you how much power you ACTUALLY need, and it will spit out good quality units as recommendations)
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Western Digital Blue 250GB Pioneer DVDRW Stock Windows 7 Ultimate 
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