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is a 4 pin +12V power just for CPU or not??

post #1 of 5
Thread Starter 
Hi Everyone!
I have question about the 4pin +12V connector, do a 4 pin +12V power use just for CPU or it will use for another components like graphic card or mainboard??
I asked this question because my power sypply (Cooler Master eXtreme 430W) use one +12V Rail (15A) just for my 12V 4pin connector, and if I wanna use for exp. an 8800GT with about 100W power usage, probably another +12 Rail (14A) that use for Mainboard, S.ATAs and PCI-E Connector, will overrun! so I wanna know that is +12V 4Pin Connector is shared to all component or it's just for processor.

Thanks is advance!
Soprano
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CPUMotherboardGraphicsRAM
Intel Pentium E5200@ 3.5GHz ASUS P5K-PL ATI 4650 800/1150 2GB Transcend 800@ 966MHz 
Hard DriveOptical DriveOSMonitor
250GB Maxtor + 750 Western Digital Samsung 22X DVD-RW Vista Ultimate BenQ 20" FP202W 
Power
430W Cooler Master 
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Soprano
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CPUMotherboardGraphicsRAM
Intel Pentium E5200@ 3.5GHz ASUS P5K-PL ATI 4650 800/1150 2GB Transcend 800@ 966MHz 
Hard DriveOptical DriveOSMonitor
250GB Maxtor + 750 Western Digital Samsung 22X DVD-RW Vista Ultimate BenQ 20" FP202W 
Power
430W Cooler Master 
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post #2 of 5
rails don't work like that. You can have multple plugs running off the same rail. Actually, many multiple rail PSU's are actually single rail and are just sold as multiple rails. It is a bit confusing and I honestly don't know the specifics, but there are many on here that do.


here:http://www.overclock.net/faqs/88626-...tiple-12v.html
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post #3 of 5
Thread Starter 
Quote:
Originally Posted by dralb View Post
rails don't work like that. You can have multple plugs running off the same rail. Actually, many multiple rail PSU's are actually single rail and are just sold as multiple rails. It is a bit confusing and I honestly don't know the specifics, but there are many on here that do.


here:http://www.overclock.net/faqs/88626-...tiple-12v.html
any way there is an limitation on my power supply rails, (as I read in my power supply uses's manual), so still there is a question about the connector desceriptions!
Soprano
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Pentium E5200@ 3.5GHz ASUS P5K-PL ATI 4650 800/1150 2GB Transcend 800@ 966MHz 
Hard DriveOptical DriveOSMonitor
250GB Maxtor + 750 Western Digital Samsung 22X DVD-RW Vista Ultimate BenQ 20" FP202W 
Power
430W Cooler Master 
  hide details  
Reply
Soprano
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Pentium E5200@ 3.5GHz ASUS P5K-PL ATI 4650 800/1150 2GB Transcend 800@ 966MHz 
Hard DriveOptical DriveOSMonitor
250GB Maxtor + 750 Western Digital Samsung 22X DVD-RW Vista Ultimate BenQ 20" FP202W 
Power
430W Cooler Master 
  hide details  
Reply
post #4 of 5
Quote:
Originally Posted by BabakSanei View Post
any way there is an limitation on my power supply rails, (as I read in my power supply uses's manual), so still there is a question about the connector desceriptions!
Sorry, I guess I am a bit confussed as to what you are asking in terms of power draw. As far as I know, the 4 pin is only ever used for the CPU mobo connecttion. GFX cards will have either a 6 or 8 pin.


edit: I guess what i am trying to say is that I do not think there is a seperate 12v rail specifically for that 4 pin connector. They may say that there is, but if you have another 12v item that is drawing off the 12v rail and it needs more (GFX card for instance) it will draw the needed power. From what I know, just because it is listed as a multiple rail PSU, that does not mean you are limited to the amount of draw on any one rail. You can't max out one rail while others are only being 1/2 used, for example.
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post #5 of 5
Thread Starter 
intresting!! it will be very nice if my power supply act as you said!!
Soprano
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Pentium E5200@ 3.5GHz ASUS P5K-PL ATI 4650 800/1150 2GB Transcend 800@ 966MHz 
Hard DriveOptical DriveOSMonitor
250GB Maxtor + 750 Western Digital Samsung 22X DVD-RW Vista Ultimate BenQ 20" FP202W 
Power
430W Cooler Master 
  hide details  
Reply
Soprano
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Pentium E5200@ 3.5GHz ASUS P5K-PL ATI 4650 800/1150 2GB Transcend 800@ 966MHz 
Hard DriveOptical DriveOSMonitor
250GB Maxtor + 750 Western Digital Samsung 22X DVD-RW Vista Ultimate BenQ 20" FP202W 
Power
430W Cooler Master 
  hide details  
Reply
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