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Polaris RX 480 / RX 470 / RX 460 Discussion Thread - Page 90  

post #891 of 991
Quote:
Originally Posted by flopticalcube View Post

Officially, 8 pin has 3 grounds, 3 power and 2 sense lines. The 6 pin has 2 power, two ground, 1 unconnected and 1 sense. In practice, the unconnected line is usually power and the second sense line on the 8 pin is just connected to ground.

https://allpinouts.org/pinouts/connectors/power_supply/pci-express-pcie-6pin-power/

https://allpinouts.org/pinouts/connectors/power_supply/pci-express-pcie-8pin-power/

Yellow is power, black is ground.



2 additional cables are black.
post #892 of 991
Yeah, the NC wire is usually connect to power. Sense seems to be no longer used as it really doesn't help in 12V lines (better for 3.3V where a 100mv drop is important to know) so they are just grounded. 6 pin is 75W over the 2 power wires (officially) but 8 is 150W over 3 so the 6 pin is far more capable than people think. Anyhow, the end result in modern PSUs is that 8 pin = 6 pin + two grounds so 150W is usually easily doable.

http://www.overclock.net/a/gpu-and-cpu-power-connections
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post #893 of 991
Quote:
Originally Posted by flopticalcube View Post

Yeah, the NC wire is usually connect to power. Sense seems to be no longer used as it really doesn't help in 12V lines (better for 3.3V where a 100mv drop is important to know) so they are just grounded. 6 pin is 75W over the 2 power wires (officially) but 8 is 150W over 3 so the 6 pin is far more capable than people think. Anyhow, the end result in modern PSUs is that 8 pin = 6 pin + two grounds so 150W is usually easily doable.
Exactly. Every modern, quality psu have 3 power cables in 6 pin power cord. They also go way over the peg spec too, but still i would like to see a 2x6pin card.
post #894 of 991
Quote:
Originally Posted by prznar1 View Post

Exactly. Every modern, quality psu have 3 power cables in 6 pin power cord. They also go way over the peg spec too, but still i would like to see a 2x6pin card.
8pin = 2x6pin so why the heck would you want 2x6pin...

8pin is 150W
6pin is 75W

No AIB will make 2x6pin as it is useless, takes more space and costs more than a single 8pin.

When they do add power they add 8+6 and 8+8 even 8+8+8.
post #895 of 991
rolleyes.gif
Quote:
Originally Posted by JackCY View Post

8pin = 2x6pin so why the heck would you want 2x6pin...

8pin is 150W
6pin is 75W

No AIB will make 2x6pin as it is useless, takes more space and costs more than a single 8pin.

When they do add power they add 8+6 and 8+8 even 8+8+8.
rolleyes.gif Have you even read posts above?
post #896 of 991
Quote:
Originally Posted by prznar1 View Post

rolleyes.gif
rolleyes.gif Have you even read posts above?
Don't matter how many wires there are I know how much power wires can handle it's the official specs that matter to AIBs.
If you don't have an 8pin connector out of PSU, make one.
post #897 of 991
anyone know if there is support for three way crossfire and or reviews
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post #898 of 991
Quote:
Originally Posted by JackCY View Post

Don't matter how many wires there are I know how much power wires can handle it's the official specs that matter to AIBs.
If you don't have an 8pin connector out of PSU, make one.
you dont understand. Every single modern psu can give you only 6+2 pin connectors. Do you still not get it? 6 P ins of 8 are still designed for specs of 8 pin, since additional two are only ground, 6 pins can deliver 150w because in those 6 pins out of 8 are 12v cables delivering power. Sigh.
post #899 of 991
The extra two pins are strictly to comply with the older PCIe spec for old ass motherboards that needed the extra grounds to lower resistance to help out the VRMS.

Electrically, there is no problem at all drawing 150watts through a 6 pin.

If you have a mobo with PCIe 2.0, there is no issue.
Edited by The Mac - 8/4/16 at 9:06am
post #900 of 991
Very disappointed in the pricing. Cheapest 470 up here is C$280 but I can buy a 480 for C$260 (when in stock). So sad.
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