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post #2001 of 2870
Quote:
Originally Posted by Dyson Poindexter View Post

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Originally Posted by looniam View Post

Quote:
Originally Posted by Dyson Poindexter View Post

Warning: Spoiler! (Click to show)
Quote:
Originally Posted by looniam View Post

Quote:
Originally Posted by Dyson Poindexter View Post

Quote:
Originally Posted by NFL View Post

I wouldn't mind a single 8-pin
A 6-pin connector is good for between 200 to 300 watts. The 6-pin connector has 4 current carrying wires in it, the 8-pin has 6.

The 75 W "rating" for the 6-pin connector is completely artificial if you have a good PSU.

they BOTH have 3 lines of 12volts. old 6 pin could have 2 on cheap PSUs; that is why there is 1 sensor on 6 pin but 2 sensors on 8 pin. Warning: Spoiler! (Click to show)
Pin 2 is not defined on the 6-pin, pin 5 is a sense line. Often 2 is tied to +12v and 5 is grounded (and not supposed to carry current), but they are not part of the 6-pin connector. "Cheap PSUs" are actually the compliant ones here.


source for your image?


http://wenku.baidu.com/view/21e1d2573c1ec5da50e270e8.html
Even if pin 2 is +12v, there's no corresponding ground path. And if there were, the connector would be identical to the 8-pin connector which supplies 150W, so it would be irrelevant anyway.



read the specs bro. thumb.gif
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post #2002 of 2870
Quote:
Originally Posted by ZealotKi11er View Post

Only get 20MH/s with 7970. The problem here is actual memory bandwidth. I do not think compression help mining at all. 290X get 32MH/s because of monstrous 512-Bit.

Both my 290x only do 28.4mh\s stock and 30.4 1060\1250

Tried them with different mboards and os. Still the same hash rate.
post #2003 of 2870
Quote:
Originally Posted by Oj010 View Post

What clock speed and driver? I'm running at around 1,150-1,200 MHz and using 14.11.2 Beta (yes I know it's bloody ancient, but it's the best I've found).

better question would be what miner are you using?

I've seen best results with the claymore verison.
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post #2004 of 2870
Quote:
Originally Posted by looniam View Post

Quote:
Originally Posted by Dyson Poindexter View Post

Warning: Spoiler! (Click to show)
Quote:
Originally Posted by looniam View Post

Quote:
Originally Posted by Dyson Poindexter View Post

Warning: Spoiler! (Click to show)
Quote:
Originally Posted by looniam View Post

Quote:
Originally Posted by Dyson Poindexter View Post

Quote:
Originally Posted by NFL View Post

I wouldn't mind a single 8-pin
A 6-pin connector is good for between 200 to 300 watts. The 6-pin connector has 4 current carrying wires in it, the 8-pin has 6.

The 75 W "rating" for the 6-pin connector is completely artificial if you have a good PSU.

they BOTH have 3 lines of 12volts. old 6 pin could have 2 on cheap PSUs; that is why there is 1 sensor on 6 pin but 2 sensors on 8 pin. Warning: Spoiler! (Click to show)
Pin 2 is not defined on the 6-pin, pin 5 is a sense line. Often 2 is tied to +12v and 5 is grounded (and not supposed to carry current), but they are not part of the 6-pin connector. "Cheap PSUs" are actually the compliant ones here.


source for your image?


http://wenku.baidu.com/view/21e1d2573c1ec5da50e270e8.html
Even if pin 2 is +12v, there's no corresponding ground path. And if there were, the connector would be identical to the 8-pin connector which supplies 150W, so it would be irrelevant anyway.



read the specs bro. thumb.gif
Well, it's not supposed to be a ground path. So, what do the two extra grounds do on the 8-pin connector, that allow the 3 +12v lines to provide more current?
post #2005 of 2870
Quote:
Originally Posted by ebduncan View Post

better question would be what miner are you using?

I've seen best results with the claymore verison.

Ethminer 0.9.41
post #2006 of 2870
Quote:
Originally Posted by Dyson Poindexter View Post

Warning: Spoiler! (Click to show)
Quote:
Originally Posted by looniam View Post

Quote:
Originally Posted by Dyson Poindexter View Post

Warning: Spoiler! (Click to show)
Quote:
Originally Posted by looniam View Post

Quote:
Originally Posted by Dyson Poindexter View Post

Warning: Spoiler! (Click to show)
Quote:
Originally Posted by looniam View Post

Quote:
Originally Posted by Dyson Poindexter View Post

Quote:
Originally Posted by NFL View Post

I wouldn't mind a single 8-pin
A 6-pin connector is good for between 200 to 300 watts. The 6-pin connector has 4 current carrying wires in it, the 8-pin has 6.

The 75 W "rating" for the 6-pin connector is completely artificial if you have a good PSU.

they BOTH have 3 lines of 12volts. old 6 pin could have 2 on cheap PSUs; that is why there is 1 sensor on 6 pin but 2 sensors on 8 pin. Warning: Spoiler! (Click to show)
Pin 2 is not defined on the 6-pin, pin 5 is a sense line. Often 2 is tied to +12v and 5 is grounded (and not supposed to carry current), but they are not part of the 6-pin connector. "Cheap PSUs" are actually the compliant ones here.


source for your image?


http://wenku.baidu.com/view/21e1d2573c1ec5da50e270e8.html
Even if pin 2 is +12v, there's no corresponding ground path. And if there were, the connector would be identical to the 8-pin connector which supplies 150W, so it would be irrelevant anyway.



read the specs bro. thumb.gif
Well, it's not supposed to be a ground path. So, what do the two extra grounds do on the 8-pin connector, that allow the 3 +12v lines to provide more current?

look i am in the same boat as you; after years of reading people quote "knowledge" and web site articles i was more than surprise to finally read the specs (PCI-SIG has a membership requirement) and see 3 12v wires spec'd for both connections; whereas 6 pin has two grounds one ground/sensor and 8 pin 3 grounds and two ground/sensors.

now whether or not 2 wire/6 pin pci-e connections (those cheap PSUs we both mentioned) had a blind eye turn towards them because two 18awg wire can safely deliver 75 watts would be a guess. though @Phaedrus2129 has been a product manager for a few PSU rebrands (eVGA and coolermaster) and may answer that.
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post #2007 of 2870
Quote:
Originally Posted by looniam View Post

Quote:
Originally Posted by Dyson Poindexter View Post

Warning: Spoiler! (Click to show)
Quote:
Originally Posted by looniam View Post

Quote:
Originally Posted by Dyson Poindexter View Post

Warning: Spoiler! (Click to show)
Quote:
Originally Posted by looniam View Post

Quote:
Originally Posted by Dyson Poindexter View Post

Warning: Spoiler! (Click to show)
Quote:
Originally Posted by looniam View Post

Quote:
Originally Posted by Dyson Poindexter View Post

Quote:
Originally Posted by NFL View Post

I wouldn't mind a single 8-pin
A 6-pin connector is good for between 200 to 300 watts. The 6-pin connector has 4 current carrying wires in it, the 8-pin has 6.

The 75 W "rating" for the 6-pin connector is completely artificial if you have a good PSU.

they BOTH have 3 lines of 12volts. old 6 pin could have 2 on cheap PSUs; that is why there is 1 sensor on 6 pin but 2 sensors on 8 pin. Warning: Spoiler! (Click to show)
Pin 2 is not defined on the 6-pin, pin 5 is a sense line. Often 2 is tied to +12v and 5 is grounded (and not supposed to carry current), but they are not part of the 6-pin connector. "Cheap PSUs" are actually the compliant ones here.


source for your image?


http://wenku.baidu.com/view/21e1d2573c1ec5da50e270e8.html
Even if pin 2 is +12v, there's no corresponding ground path. And if there were, the connector would be identical to the 8-pin connector which supplies 150W, so it would be irrelevant anyway.



read the specs bro. thumb.gif
Well, it's not supposed to be a ground path. So, what do the two extra grounds do on the 8-pin connector, that allow the 3 +12v lines to provide more current?

look i am in the same boat as you; after years of reading people quote "knowledge" and web site articles i was more than surprise to finally read the specs (PCI-SIG has a membership requirement) and see 3 12v wires spec'd for both connections; whereas 6 pin has two grounds one ground/sensor and 8 pin 3 grounds and two ground/sensors.

now whether or not 2 wire/6 pin pci-e connections (those cheap PSUs we both mentioned) had a blind eye turn towards them because two 18awg wire can safely deliver 75 watts would be a guess. though @Phaedrus2129 has been a product manager for a few PSU rebrands (eVGA and coolermaster) and may answer that.
I haven't been able to find the actual spec sheet (the link you provided does not load for me) but everything I've read says that pin 2 is "not defined" but often +12v since the 8-pin requires it.

At any rate, we should be able to agree that the 75 watt limit is entirely artificial. The spec page for a mini-fit jr is 9 amps per pin, for 324 W on a 3-pair connection. Even if pin 2 were to be omitted, the "six pin" would still be rated for up to 216 W if wire gauge and trace size on either side were appropriate. I feel that the 75W limit was a result of some guy at PCI-SIG saying "surely GPUs won't need more than 150 W total."
post #2008 of 2870
The 6/8pin PCIe power limits are a convention. Sure the 6pin connector and wires can pull much more practically. You just gotta mod the hardware because most is designed to fit within that power envelope and not to go over it. Means strong VRM, custom VBIOS, ... when it comes to GPU.
post #2009 of 2870
Quote:
Originally Posted by Oj010 View Post

Ethminer 0.9.41

drop that

use this instead if you have AMD cards

https://bitcointalk.org/index.php?topic=1433925.0
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post #2010 of 2870
Quote:
Originally Posted by ebduncan View Post

Quote:
Originally Posted by Oj010 View Post

Ethminer 0.9.41

drop that

use this instead if you have AMD cards

https://bitcointalk.org/index.php?topic=1433925.0
I never had good luck with Claymore, I've been using Genoil with a lot of success.
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