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[Reddit] RX 480 fails PCI-E specification - Page 6  

post #51 of 1129
Quote:
Originally Posted by Penryn View Post

I meant more in the sense that it drew a lot of power altogether. Iirc it drew as as two 5870s which was it's competitor at the time. We also have to remember these are reviewer cards and may not be exactly what is released.

Reviews site are already reporting the results are the same on Retail cards.
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post #52 of 1129
Quote:
Originally Posted by Imouto View Post

Tolerance is in the specs.

For example breakers can witstand an overcurrent for the amount of time the spec specifies. (Specially useful for motor starts and such)

Ok could you link me to said specs then? Because I don't remember reading about tolerances.
post #53 of 1129
Quote:
reddit

stopped reading right about there
post #54 of 1129
Quote:
Originally Posted by Penryn View Post

Sensationalist news is sensationalist. I wonder what some of the other high end cards are pulling from PCI-E slots. People seem to forget about the GTX 480. Maybe using the number 480 is a bad idea period.

Quote:
Originally Posted by Penryn View Post

Quote:
Originally Posted by brucethemoose View Post

Link?

Everyone knows the 480 was a space heater, but I can't find anything about it pulling way too much power over the Pcie bus, specifically.


The other thing is that the RX 480 technically isn't a top end card, unlike the GTX 480 or the dual GPU monsters. People dont expect it to go way over spec.

EDIT: spelling

I meant more in the sense that it drew a lot of power altogether. Iirc it drew as as two 5870s which was it's competitor at the time. We also have to remember these are reviewer cards and may not be exactly what is released.


The news can't be sensationalist if it is based on measurements made by more than one site. There may be some faulty cards or some weird problem with the test systems, but I don't think that equates to sensationalism. I wonder what other cards pulled a few years ago too, but that does not equate to them going over spec as seems to be the case here.

Talking about the GTX 480, the reference card has an 8 and a 6 pin power connector. That's good for 300w: 75w (PCIe slot) + 150w (8 pin) + 75w (6 pin).

The reference RX 480 on the other hand seems to not only go over spec on the PCIe slot, it seems to be going globally over spec as its power consumption is simply too close to the power delivery specs of the arrangement that they chose. This is not a $500 card that will be going into powerful systems with quality PSUs and motherboards, enthusiasts built or OEM built, it's supposed to be the entry point for VR and OEMs and people on a budget won't make any economic sense out of having to put a more expensive motherboard and / or PSU to go with a mid-range GPU.

AMD probably wanted to give the impression that the RX 480 sipped power and was thus more energy efficient before launch and that there was headroom to overclock on a 6-pin, but there isn't. The reference GTX 970 has a max. graphics card power of 145w and comes with two 6-pin connectors. That is what AMD should have done too.
Edited by tpi2007 - 6/29/16 at 7:28pm
 
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post #55 of 1129
Quote:
Originally Posted by dmasteR View Post

Reviews site are already reporting the results are the same on Retail cards.

Which reviewers used retail cards that had power draw figures? I was thinking of getting the RX 480 for my brother but he has average components on his rig and I'd need to be convinced it's not going to burn out his mobo PCIe. Thanks!

EDIT: Most probably need to wait for AIBs but those are going to cost more for sure. biggrin.gif
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post #56 of 1129
I would only assume that the card was initially planned to be clocked lower hence the 6pin. I don't think it was meant to fool anyone to meet a certain appearance. Could be why the card took so long to launch when everything points to it being ready months ago
post #57 of 1129
Quote:
Originally Posted by tpi2007 View Post

Quote:
Originally Posted by Penryn View Post

Sensationalist news is sensationalist. I wonder what some of the other high end cards are pulling from PCI-E slots. People seem to forget about the GTX 480. Maybe using the number 480 is a bad idea period.

Quote:
Originally Posted by Penryn View Post

Quote:
Originally Posted by brucethemoose View Post

Link?

Everyone knows the 480 was a space heater, but I can't find anything about it pulling way too much power over the Pcie bus, specifically.


The other thing is that the RX 480 technically isn't a top end card, unlike the GTX 480 or the dual GPU monsters. People dont expect it to go way over spec.

EDIT: spelling

I meant more in the sense that it drew a lot of power altogether. Iirc it drew as as two 5870s which was it's competitor at the time. We also have to remember these are reviewer cards and may not be exactly what is released.


The news can't be sensationalist if it is based on measurements made by more than one site. There may be some faulty cards or some weird problem with the test systems, but I don't think that equates to sensationalism. I wonder what other cards pulled a few years ago too, but that does not equate to them going over spec as seems to be the case here.

Talking about the GTX 480, the reference card has an 8 and a 6 pin power connector. That's good for 300w: 75w (PCIe slot) + 150w (8 pin) + 75w (6 pin).

The reference RX 480 on the other hand seems to not only go over spec on the PCIe slot, it seems to be going globally over spec as its power consumption is simply too close to the power delivery specs of the arrangement that they chose. This is not a $500 card that will be going into powerful systems with quality PSUs, enthusiasts built or OEM built, it's supposed to be the entry point for VR and OEMs with crappy PSUs and people on a budget won't make any economic sense out of having to put a more expensive motherboard and / or PSU to go with a mid-range GPU.

AMD probably wanted to give the impression that the RX 480 sipped power and was thus more energy efficient before launch and that there was headroom to overclock on a 6-pin, but there isn't. The reference GTX 970 has a max. graphics card power of 145w and comes with two 6-pin connectors. That is what AMD should have done too.

This.

The point isn't that it draws a lot of power (which is a separate issue). It just pulls more power than it should from the Pcie slot, which is a significant issue for the kinds of systems this card will go in.


It wouldn't be a big deal if all the cards on shelves were non reference, like some of AMD's past cards at this price point. But the cards in stores now appear to be reference cards.
Edited by brucethemoose - 6/29/16 at 7:35pm
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post #58 of 1129
Quote:
Originally Posted by mark_thaddeus View Post

Which reviewers used retail cards that had power draw figures? I was thinking of getting the RX 480 for my brother but he has average components on his rig and I'd need to be convinced it's not going to burn out his mobo PCIe. Thanks!

EDIT: Most probably need to wait for AIBs but those are going to cost more for sure. biggrin.gif

Here's one off the bat.

http://www.hardware.fr/articles/951-9/consommation-efficacite-energetique.html

RX 480 comes with a 6 pins PCIE and most of the power drain is shared between the 6 pins and the PCI Express port (sometime more on the latter). The cards does go way over the specs which is 5.5A. In Battlefield 4, we are getting 6.92A and 7.10A with OC (called "Uber" mode in the review). Witcher 3 goes even higher with 7.79A. This stress is not expected on all motherboards.


EDIT: If you take a look at the graph, you'll see in Witcher it actually pulls near 200W in Uber Mode.
Edited by dmasteR - 6/29/16 at 7:37pm
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post #59 of 1129
This is disappointing. Was gonna get a GTX 1070 but price gouging is making that undesirable (especially given custom cards being more expensive than ref). Then I was considering the RX480, and then this happens. Ugh
post #60 of 1129
Quote:
Originally Posted by magnek View Post

Ok could you link me to said specs then? Because I don't remember reading about tolerances.

did you want THIS? (Click to show)
or
THIS? (Click to show)
tongue.gif
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