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[Reddit] RX 480 fails PCI-E specification - Page 83  

post #821 of 1129
Quote:
Originally Posted by mtcn77 View Post

I don't understand this: are there 3 active pins on every modern 6 pin connector or 2?

There are 3+ and 3- on a 6 pin and 2extra grounds on an 8 pin. There are no sense wires on GPU power feeds.
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post #822 of 1129
blah seems they rejected my refund and sent me the card anyway -.-.

gues ill see what amd does for a fix if the specs are turned down im gonna return it under false advertisement
post #823 of 1129
Quote:
Originally Posted by B NEGATIVE View Post

There are 3+ and 3- on a 6 pin and 2extra grounds on an 8 pin. There are no sense wires on GPU power feeds.

Yes thumb.gif but there is also a possibility of pin 5 being sense, which provides backup and is lower gauge.

But I will quote here:
Quote:
The PCI Express specification is, unfortunately, not a free, public specification....Welcome to the uncertainty which happens when you don't have freely available specifications.
http://www.playtool.com/pages/psuconnectors/connectors.html#pciexpress

Edit:
Even so, there is no problem with consuming more than 75watt out 6pin PEG
Edited by C2H5OH - 7/4/16 at 5:52am
post #824 of 1129
Quote:
Originally Posted by C2H5OH View Post

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

There are 3+ and 3- on a 6 pin and 2extra grounds on an 8 pin. There are no sense wires on GPU power feeds.

Yes thumb.gif but there is also a possibility of pin 5 being sense, which provides backup and is lower gauge.
But I will quote here:
Quote:
The PCI Express specification is, unfortunately, not a free, public specification....Welcome to the uncertainty which happens when you don't have freely available specifications.
http://www.playtool.com/pages/psuconnectors/connectors.html#pciexpress
Warning: Spoiler! (Click to show)
Edit:
Even so, there is no problem with consuming more than 75watt out 6pin PEG

EXACTLY!

but some leaks can be found.

http://wenku.baidu.com/view/21e1d2573c1ec5da50e270e8.html for PCI_Express_x16_150W-ATX_1 [1] .0 (WARNING! lots of java!)

i still have a little skepticism but i cross referenced a copy of the 225/300 watt doc i found (see below) to that site and it appears correct; though there are some formatting issues with page numbers as some are numerals as other are written out and such.

notice on page 22 and also page 32 in the 225/300 watts specs specifies three 12v pins. whereas lots off sites state there is only 2. i wonder if anyone has actually seen a two 12v pin connector?


PCIe_225_300W_14Mar08.zip 700k .zip file
Edited by looniam - 7/4/16 at 6:16am
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post #825 of 1129
Quote:
Originally Posted by looniam View Post

EXACTLY!

but some leaks can be found.

http://wenku.baidu.com/view/21e1d2573c1ec5da50e270e8.html for PCI_Express_x16_150W-ATX_1 [1] .0 (WARNING! lots of java!)

i still have a little skepticism but i cross referenced a copy of the 225/300 watt doc i found (see below) to that site and it appears correct; though there are some formatting issues with page numbers as some are numerals as other are written out and such.

notice on page 22 and also page 32 in the 225/300 watts specs specifies three 12v pins. whereas lots off sites state there is only 2. i wonder if anyone has actually seen a two 12v pin connector?


PCIe_225_300W_14Mar08.zip 700k .zip file

Well, this is the problem with closed specifications, you never know for certain (unless you pay) but as @B NEGATIVE said, you most probably have 3+ and 3- (or in some cases 3+ and 2- and sense) and you can consume way more than 75W trough a 6 pin PEG.

Don't understand why PSI SIG are so conservative.

Edit:
Even back in 2008 the the specs are saying AWG18 for the wires or good for 7A each.
Edited by C2H5OH - 7/4/16 at 6:41am
post #826 of 1129
Quote:
Originally Posted by C2H5OH View Post

Yes thumb.gifbut there is also a possibility of pin 5 being sense, which provides backup and is lower gauge.

But I will quote here:
http://www.playtool.com/pages/psuconnectors/connectors.html#pciexpress

Edit:
Even so, there is no problem with consuming more than 75watt out 6pin PEG

No,there is not,pin 5 is ground.

Please READ the links you post....
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post #827 of 1129
Quote:
Originally Posted by B NEGATIVE View Post

No,there is not,pin 5 is ground.

Please READ the links you post....

It depends where you're looking, but it depends who (as manufacturer) chose to do (implement) what smile.gif
http://forums.evga.com/System-won39t-power-on-when-VGU-has-power-m2377316.aspx
post #828 of 1129
Quote:
Originally Posted by C2H5OH View Post

It depends where you're looking, but it depends who (as manufacturer) chose to do (implement) what smile.gif
http://forums.evga.com/System-won39t-power-on-when-VGU-has-power-m2377316.aspx

Ok...if you want. From the OCN PSU pinout repository




http://www.overclock.net/t/1420796/repository-of-power-supply-pin-outs/260_20


Either/or it has to conform to ATX spec which doesnt have a sense wire.
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post #829 of 1129
Quote:
Originally Posted by C2H5OH View Post

Well, this is the problem with closed specifications, you never know for certain (unless you pay) but as @B NEGATIVE said, you most probably have 3+ and 3- (or in some cases 3+ and 2- and sense) and you can consume way more than 75W trough a 6 pin PEG.

Don't understand why PSI SIG are so conservative.

Edit:
Even back the the specs are saying AWG18 for the wires or good for 7A each.

i guess pci-sig was looking to be compensated by charging $2,000 for non memebers to get a copy. ($50 for a member).

and that lead to a lot of popular wisdom with people assuming 75 watts was the absolute limit so therefore 75w/12v=6.25a TOTAL

btw, i know you looked at the 225/300 doc because (if you're fearless enough to look) the 150 doc specs pins @8amps.

go figure.

E:
Quote:
Originally Posted by C2H5OH View Post

Quote:
Originally Posted by B NEGATIVE View Post

No,there is not,pin 5 is ground.

Please READ the links you post....

It depends where you're looking, but it depends who (as manufacturer) chose to do (implement) what smile.gif
http://forums.evga.com/System-won39t-power-on-when-VGU-has-power-m2377316.aspx Warning: Spoiler! (Click to show)

i have thrown this around a lot lately:



sense pins ARE grounds. thumb.gif
Edited by looniam - 7/4/16 at 6:57am
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post #830 of 1129
The funny thing is that when we first talked about this card we all said 75W form PCIE Lane and 75W from the 6-Pin. Right there and then we where wrong. 6-Pin has to be out of specification for PCIE Lane to be within safe limits. We can't assume PCIE Lanes to use 75W in the future. Probably 50W tops and the over-current is going though the PCIE connectors.
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