Sign in with
Sign up | Sign in
Your question
Solved

Rather silly question indeed (PCIe Cables) ~

Tags:
  • GPUs
  • Power Supplies
  • Graphics
Last response: in Graphics & Displays
Share
a b ) Power supply
September 25, 2014 3:32:30 PM

I really should know this by now, but I always tend to stick with mid-range cards, yet to have one with an 8 and 6 pin connector as opposed to two 6 pins.

Anyway, planning to pick up a non-reference 980 soon enough, most of them tend to use the 8/6 setup for extra overclocking headroom. The part I'm stumped on comes as a result of my bone-idol-ness.

Is a 6+2 pin the same as an 8-pin when there's only 6 wires on an 8-pin connector at the power supply end?

Both of the 6+2's I currently use have this same setup at that end, absolutely no wires going into those extra ports. The other option with my supply is a 2 x 6+2 in one cable which does have 8 wires on the PSU side. Really can't be bothered to swap them both out for that.

I've always been under the impression that a 6+2 is an 8-pin. But those missing wires at the other end have me stumped.

More about : silly question pcie cables

Best solution

a c 166 ) Power supply
September 25, 2014 6:34:11 PM

Yes, 6+2 is the same as 8 pin. The number of conductors (wires) doesn't matter. What matters is the size of the conductors. 8 pin connectors are designed to handle 150W of additional power at +12V DC. That means each group of 3 conductors (3 pos and 3 neg) going to the connector must be able to safely carry 12.5 amps... or ~4 amps per conductor. No PSU I know of uses wire size so small that each wire would not carry at least 4 amps.
Share
a b ) Power supply
September 26, 2014 4:48:54 AM

clutchc said:
Yes, 6+2 is the same as 8 pin. The number of conductors (wires) doesn't matter. What matters is the size of the conductors. 8 pin connectors are designed to handle 150W of additional power at +12V DC. That means each group of 3 conductors (3 pos and 3 neg) going to the connector must be able to safely carry 12.5 amps... or ~4 amps per conductor. No PSU I know of uses wire size so small that each wire would not carry at least 4 amps.


Awesome, that satisfies my laziness.

Thanks dude.
m
0
l
!