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[Reddit] RX 480 fails PCI-E specification - Page 20  

post #191 of 1129
Quote:
Originally Posted by Hequaqua View Post

AGP...a term that I haven't used or seen in years. lol

Did a AGP slot supply any wattage to the cards?

 

They did, but mainly to supply power for the POST process and to determine what power requirements the GPU had. There's a lot of activity for things like power bring-up and waking up the card from idle that needs power from the PCI-E/PCI/AGP slots first before acknowledging additional power being fed by an auxiliary power connector.

 

In fact, this is one of the reasons why some GPUs will power on and function without the power connector plugged in, as some GTX 750 Ti cards recently proved. The GPU itself uses very little power at POST and in idle mode that it doesn't need auxiliary power, but it's a help when you need to extract more speed from the chip.

 

Quote:
Originally Posted by Themisseble View Post

Well I dont get it.

Why would AMD make single six pin if their card is just to power hungry?! PCB looks better on RX 480 (maybe not efficient) than on GTX 1080FE.
What about GTX 750TI OC using more than 80W from PCIe?
 
One theory that I have is that they wanted to match the GTX 970's power rating on paper. That card is rated at 148W, while the RX 480 is sold as a 150W TDP product. Sure, the GTX 970 could draw more than its rated TDP, but it never went high enough to cause concern, or to cause the PCI-E bus to be overdrawn. 
 
I wonder, also, if the Radeon Wattman functionality isn't clashing with the board imposing power limits on the PCI-E slot. 

Edited by CataclysmZA - 6/30/16 at 8:51am
post #192 of 1129
I got two coming today for crossfire, all I have to say is...
 
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post #193 of 1129
Quote:
Originally Posted by CataclysmZA View Post

They did, but mainly to supply power for the POST process and to determine what power requirements the GPU had. There's a lot of activity for things like power bring-up and waking up the card from idle that needs power from the PCI-E/PCI/AGP slots first before acknowledging additional power being fed by an auxiliary power connector.

In fact, this is one of the reasons why some GPUs will power on and function without the power connector plugged in, as some GTX 750 Ti cards recently proved. The GPU itself uses very little power at POST and in idle mode that it doesn't need auxiliary power, but it's a help when you need to extract more speed from the chip.

Yeah well AMD does make good and efficient cards... why does RX 480 use so much power?
post #194 of 1129
Quote:
Originally Posted by Klocek001 View Post

what exactly is the point of this?

Quote:
Originally Posted by Hequaqua View Post

Agreed.

I just looks like you can use this to convert the PCiE slot to a molex. I'm not sure how that would help in supplying any more to a card.

You guys read the description for the product yeah?
Quote:
Provides Clean Power to the PCI-E Bus, improving stability.

You're not supplying the card you are supplying the board with more power. Then again I'm sure the 24 pin can handle the extra wattage needed smile.gif.
post #195 of 1129
I will say it again. PCi-e SIG had rx 480 in their own hands, and they aproved it. No need to worry about it to much.
post #196 of 1129
Quote:
Originally Posted by prznar1 View Post

I will say it again. PCi-e SIG had rx 480 in their own hands, and they aproved it. No need to worry about it to much.

But but but we need something to complain about!
 
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post #197 of 1129
Quote:
Originally Posted by prznar1 View Post

I will say it again. PCi-e SIG had rx 480 in their own hands, and they aproved it. No need to worry about it to much.

But how can we bash AMD for no reason then?
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post #198 of 1129
Quote:
Originally Posted by DaaQ View Post

The Specifications do define the protocol and not the hardware specs of the PCI-E slot. If a manufacturer uses better parts which can handle higher amps on the contacts and the lines, they can allow the devie in the slot a higher power consumption than 75 watt via these registers.
Sadly most people doesnt even read the specifications and judge things they dont understand.
http://composter.com.ua/documents/PCI_Express_Base_Specification_Revision_3.0.pdf

This, Its like no one read his post.

"PCI Express provides a mechanism for software controlled limiting of the maximum power per slot
that a PCI Express adapter (associated with that slot) can consume."

SOFTWARE, can be limited wink.gif
Edited by Yttrium - 6/30/16 at 9:27am
post #199 of 1129
Quote:
Originally Posted by Yttrium View Post

This, Its like everyone didn't read his post.

PCI Express provides a mechanism for software controlled limiting of the maximum power per slot
that a PCI Express adapter (associated with that slot) can consume.

SOFTWARE, can be limited wink.gif

Someone wants to downplay amd eating their lunch.
post #200 of 1129
Im waiting for people to claim the lights dim in their rooms when the RX 480 goes into a benchmark...
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