However the 8 pin is designed to supply up to 150w of power the 6 pin only 75w.
Pcie power cable 8 pin voltage.
Sense pins are connected to ground at power supply or adapter cable.
As the title asks.
In all likelihood however real implementations of this power cable can provide far more than 75 watts.
The only difference is the two extra grounds.
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It is not used by the power supply for remote voltage sensing to compensate for voltage drop over the wiring.
I upgraded from my x800gto which had it s own special wire connection to a 9600gt.
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.
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.
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I connected my new card with the 6 pin power cable that came with my psu 36a on the 12v rails.
Pci e power cable 8 pin vs 6 pin you are correct.
8 pin pci express pcie power cable connector.
This is an 8 pin version introduced with the pci express 2 0 specification released in january 2007.
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.
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Many video cards draw significantly more than 75 watts provided by the motherboard slot so the 6 pin pci express power cable was created.
A graphics card with one 8 pin power connector can get maximum of 225w of power 75w from pci express x16 slot and 150w.
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This connector is used to provide extra 12 volt power to pci express expansion cards.
The pci express 2 0 specification released in january 2007 added an 8 pin pci express power cable.
Nonetheless the 6 pin pci express power cable officially provides only 75 watts.
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