This connector is used to provide extra 12 volt power to pci express expansion cards.
Pcie power cable 8 pin voltage.
Sense pins are connected to ground at power supply or adapter cable.
This allows the pcie card to detect if a supply cable is connected or not and whether a 6 pin supply is connected to 8 pin socket to indicate less power is available.
8 pin pci express pcie power cable connector.
I connected my new card with the 6 pin power cable that came with my psu 36a on the 12v rails.
Many pci express video cards which have the 6 pin or 8 pin pci express power cable still draw a substantial portion of their 12 volt load through the pci express slot.
However the 8 pin is designed to supply up to 150w of power the 6 pin only 75w.
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Graphics card 6 pin and 8 pin connectors explained.
Nonetheless the 6 pin pci express power cable officially provides only 75 watts.
Many video cards draw significantly more than 75 watts provided by the motherboard slot so the 6 pin pci express power cable was created.
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As the title asks.
A graphics card with one 8 pin power connector can get maximum of 225w of power 75w from pci express x16 slot and 150w.
The pci express 2 0 specification released in january 2007 added an 8 pin pci express power cable.
Get it as soon as thu sep 24.
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The extra 4 pins doubled the current capacity of the 12 volt rail so that one is easy to overload when only using a 20 pin main power cable.
I upgraded from my x800gto which had it s own special wire connection to a 9600gt.
It is not used by the power supply for remote voltage sensing to compensate for voltage drop over the wiring.
6 pin power connector can supply 75 watt to the graphics card while 8 pin power connector can deliver maximum of 150w to your graphics card.
Buy adapters or power converter cables for 6 pin pci e and 8 pin pci e connectors.
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The only difference is the two extra grounds.