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12v rail question

post #1 of 7
Thread Starter 
does the CPU + GPU draw their power from the 12v rail only?
Underdog
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Underdog
(17 items)
 
  
CPUMotherboardGraphicsRAM
Intel C2Q6600 G0 @ 3.40Ghz 8 x 425Mhz 1.26v Gigabyte GA-EP45-UD3R MSI N460GTX Cyclone 1GD5/OC @ 850Mhz/4200Mhz 1.08v Kingston 4x2GB PC2-6400 5-5-5-15 1.90v 1:1 
Hard DriveHard DriveOptical DriveCooling
Samsung Spinpoint 250GB  WesternDigital Blue 160GB Samsung SATA DVD-RW +/- Cooler Master Hyper T4  
OSOSMonitorKeyboard
Windows 7 Ultimate 64Bit Windows 8 Pro 64Bit ASUS VS228-D A4TECH GR-152 
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Corsair VS450W Everest 707BR A4TECH G9-730FX Black 
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post #2 of 7

Nope.  Here's an article explaining what each rail powers:

 

http://www.overclock.net/t/722251/on-psu-voltages

It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
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Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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post #3 of 7
Technically you might answer "yes" to the question.

CPU gets power from dedicated voltage regulators on the motherboard, which operate from +12V (take +12V as input voltage, output VCore in some 0.8-1.6V range these days). Actually, CPU gets multiple voltages, but all these are generated from +12V. GPU gets power from dedicated voltage regulators on the graphics card, which operate from +12V. Other components on a graphics card may draw a little bit of power from +3.3V, but the GPU itself is getting everything via the +12V rail.
post #4 of 7
Thread Starter 
i quote:

"+12V

Info: The +12V rail is the main power rail in modern computers. Modern computers draw 70%-95% of their power from the +12V rail, and the power available at +12V should make up at least 80% of the total wattage, preferably 90% in enthusiast units.
It powers:
CPU
Graphics card
Main motherboard chipsets
Hard drive motors
Optical drive motor
Most fans
Water cooling pumps
PCIe cards
Most PCI cards
"



now, since my 400W PSU has a single 20A +12V rail (240W) which is around 60% of the total wattage its safe to say that my rig below is being raped right?
biggrin.gif
Underdog
(17 items)
 
  
CPUMotherboardGraphicsRAM
Intel C2Q6600 G0 @ 3.40Ghz 8 x 425Mhz 1.26v Gigabyte GA-EP45-UD3R MSI N460GTX Cyclone 1GD5/OC @ 850Mhz/4200Mhz 1.08v Kingston 4x2GB PC2-6400 5-5-5-15 1.90v 1:1 
Hard DriveHard DriveOptical DriveCooling
Samsung Spinpoint 250GB  WesternDigital Blue 160GB Samsung SATA DVD-RW +/- Cooler Master Hyper T4  
OSOSMonitorKeyboard
Windows 7 Ultimate 64Bit Windows 8 Pro 64Bit ASUS VS228-D A4TECH GR-152 
PowerCaseMouseMouse Pad
Corsair VS450W Everest 707BR A4TECH G9-730FX Black 
Audio
Realtek ALC889A 
  hide details  
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Underdog
(17 items)
 
  
CPUMotherboardGraphicsRAM
Intel C2Q6600 G0 @ 3.40Ghz 8 x 425Mhz 1.26v Gigabyte GA-EP45-UD3R MSI N460GTX Cyclone 1GD5/OC @ 850Mhz/4200Mhz 1.08v Kingston 4x2GB PC2-6400 5-5-5-15 1.90v 1:1 
Hard DriveHard DriveOptical DriveCooling
Samsung Spinpoint 250GB  WesternDigital Blue 160GB Samsung SATA DVD-RW +/- Cooler Master Hyper T4  
OSOSMonitorKeyboard
Windows 7 Ultimate 64Bit Windows 8 Pro 64Bit ASUS VS228-D A4TECH GR-152 
PowerCaseMouseMouse Pad
Corsair VS450W Everest 707BR A4TECH G9-730FX Black 
Audio
Realtek ALC889A 
  hide details  
Reply
post #5 of 7
Thread Starter 
what do you think twocables?
Underdog
(17 items)
 
  
CPUMotherboardGraphicsRAM
Intel C2Q6600 G0 @ 3.40Ghz 8 x 425Mhz 1.26v Gigabyte GA-EP45-UD3R MSI N460GTX Cyclone 1GD5/OC @ 850Mhz/4200Mhz 1.08v Kingston 4x2GB PC2-6400 5-5-5-15 1.90v 1:1 
Hard DriveHard DriveOptical DriveCooling
Samsung Spinpoint 250GB  WesternDigital Blue 160GB Samsung SATA DVD-RW +/- Cooler Master Hyper T4  
OSOSMonitorKeyboard
Windows 7 Ultimate 64Bit Windows 8 Pro 64Bit ASUS VS228-D A4TECH GR-152 
PowerCaseMouseMouse Pad
Corsair VS450W Everest 707BR A4TECH G9-730FX Black 
Audio
Realtek ALC889A 
  hide details  
Reply
Underdog
(17 items)
 
  
CPUMotherboardGraphicsRAM
Intel C2Q6600 G0 @ 3.40Ghz 8 x 425Mhz 1.26v Gigabyte GA-EP45-UD3R MSI N460GTX Cyclone 1GD5/OC @ 850Mhz/4200Mhz 1.08v Kingston 4x2GB PC2-6400 5-5-5-15 1.90v 1:1 
Hard DriveHard DriveOptical DriveCooling
Samsung Spinpoint 250GB  WesternDigital Blue 160GB Samsung SATA DVD-RW +/- Cooler Master Hyper T4  
OSOSMonitorKeyboard
Windows 7 Ultimate 64Bit Windows 8 Pro 64Bit ASUS VS228-D A4TECH GR-152 
PowerCaseMouseMouse Pad
Corsair VS450W Everest 707BR A4TECH G9-730FX Black 
Audio
Realtek ALC889A 
  hide details  
Reply
post #6 of 7
Quote:
Originally Posted by omari79 View Post

i quote:

"+12V

Info: The +12V rail is the main power rail in modern computers. Modern computers draw 70%-95% of their power from the +12V rail, and the power available at +12V should make up at least 80% of the total wattage, preferably 90% in enthusiast units.
It powers:
CPU
Graphics card
Main motherboard chipsets
Hard drive motors
Optical drive motor
Most fans
Water cooling pumps
PCIe cards
Most PCI cards
"



now, since my 400W PSU has a single 20A +12V rail (240W) which is around 60% of the total wattage its safe to say that my rig below is being raped right? biggrin.gif

 

Yeah, I wouldn't even give that PSU to an enemy.  It's basically a very low quality 300W PSU at best.

It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
  hide details  
Reply
It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
  hide details  
Reply
post #7 of 7
Thread Starter 
this is the bastard




biggrin.gif
Underdog
(17 items)
 
  
CPUMotherboardGraphicsRAM
Intel C2Q6600 G0 @ 3.40Ghz 8 x 425Mhz 1.26v Gigabyte GA-EP45-UD3R MSI N460GTX Cyclone 1GD5/OC @ 850Mhz/4200Mhz 1.08v Kingston 4x2GB PC2-6400 5-5-5-15 1.90v 1:1 
Hard DriveHard DriveOptical DriveCooling
Samsung Spinpoint 250GB  WesternDigital Blue 160GB Samsung SATA DVD-RW +/- Cooler Master Hyper T4  
OSOSMonitorKeyboard
Windows 7 Ultimate 64Bit Windows 8 Pro 64Bit ASUS VS228-D A4TECH GR-152 
PowerCaseMouseMouse Pad
Corsair VS450W Everest 707BR A4TECH G9-730FX Black 
Audio
Realtek ALC889A 
  hide details  
Reply
Underdog
(17 items)
 
  
CPUMotherboardGraphicsRAM
Intel C2Q6600 G0 @ 3.40Ghz 8 x 425Mhz 1.26v Gigabyte GA-EP45-UD3R MSI N460GTX Cyclone 1GD5/OC @ 850Mhz/4200Mhz 1.08v Kingston 4x2GB PC2-6400 5-5-5-15 1.90v 1:1 
Hard DriveHard DriveOptical DriveCooling
Samsung Spinpoint 250GB  WesternDigital Blue 160GB Samsung SATA DVD-RW +/- Cooler Master Hyper T4  
OSOSMonitorKeyboard
Windows 7 Ultimate 64Bit Windows 8 Pro 64Bit ASUS VS228-D A4TECH GR-152 
PowerCaseMouseMouse Pad
Corsair VS450W Everest 707BR A4TECH G9-730FX Black 
Audio
Realtek ALC889A 
  hide details  
Reply
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