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[Reddit] RX 480 fails PCI-E specification - Page 18  

post #171 of 1129
THG are the only ones that checked the pci-e power draw.
AMD assures they're the only one in the world with that issue
post #172 of 1129
Quote:
Originally Posted by Klocek001 View Post

THG are the only ones that checked the pci-e power draw.
AMD assures they're the only one in the world with that issue

this smells.

When did AMD do this? Sounds like pure BS as they specifically state
Quote:
We will have more on this topic soon as we investigate, but it's worth reminding people that only a very small number of hundreds of RX 480 reviews worldwide encountered this issue.

Nowhere did they state that it's only one review. Stop spreading FUD.
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post #173 of 1129
What reviewers say about Radeon RX 480 exceeding PCI-Express power specifications
Quote:
Our measurements show that the reference design easily overloads PCIE slot. To be specific it’s 5.5 amps at 12 volts, 66 watts total. The Radeon RX 480 draws 78-83 watts out of the slot, which is more than power coming from 6-pin connector. Excessive load from PCIe slot is not limited, because it’s within safe reserves.

In the worst case scenario the motherboard would switch off. However with our Asus Z170-Deluxe in the test system, the Radeon RX 480 ran smoothly, and also with our MSI Z97 Gaming 3 there were no abnormalities. Nevertheless, the overload can theoretically lead to reboots or even damage, especially with overclocking.
Quote:
In games, the Radeon RX 480 exceeds 150 Watt thermal design power and PCIe specification. On average, we have 156 watts measured at games, in Furmark the card even pulls at reduced clock 169 watts. Extremely problematic is the fact that the Radeon RX 480 draws up to 88 watts from motherboard slot, although specifications only allow 75 watts. This may in some motherboards cause instability. Since AMD card already operates above the standard, far above the limit, it is not advised to perform overclocking experiments with the reference design, which has only one additional 6-pin connector. Here one can only hope that AMD’s partners offer boards with standards-compliant layout and sufficient power supply.

It is highly recommended to not oc the reference card.
Edited by keikei - 6/30/16 at 7:14am
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post #174 of 1129

worst case the mobo will switch off
(...but we can't guarantee it'll switch back on)


I'm just saying, if I had one in my rig I'd be pretty mad at amd, maybe I'd try to get a refund. It'd always be in the back of my head while gaming that I don't know if my card isn't overloading the pci-e 100% of the time, especially if my mobo was out of warranty period.
Edited by Klocek001 - 6/30/16 at 7:18am
post #175 of 1129
Quote:
Originally Posted by BradleyW View Post

"PCI-Express 3.0 means PCI-Express 3.0" - Nvidia.

Minus 5 points for saying this in another thread, however I'm looking forward to the Founders Edition of the PCI-Express 3.0 slot.
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post #176 of 1129
Quote:
Originally Posted by SwishaMane View Post

Better start building your custom two 6pin to one 6pin adapters... smile.gif

U SERIOUS? haha
but really... are you? I am using 16 gauge wire in my new cables, will that help?
Quote:
Originally Posted by Defoler View Post

No. Both PCIE 2.0 and 3.0 are rated just for 75w. So both have the same issue.

specool.gif *sigh of relief* so glad
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post #177 of 1129
Quote:
Originally Posted by andydabeast View Post

U SERIOUS? haha
but really... are you? I am using 16 gauge wire in my new cables, will that help?
specool.gif *sigh of relief* so glad

eVGa already makes a sleeved two 6pin to single 8pin adapter... If the RX480 really needs a push, why not build a custom cable? Eazy peazy mayne
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post #178 of 1129
Kind of off topic but why don't they just make a powered PCI-E adapter that plugs into the PCI-E slot of the motherboard, and then you can plug a spare 6 or 8 pin power connector into that adapter for more power going to the card without the power actually going through the motherboard's PCI-E slot itself?

I guess sort of like a powered USB hub, but a powered PCI-E adapter.
post #179 of 1129
post #180 of 1129
I've read this whole thread...and have a few questions that I'm not sure have been answered.

Of the reviewers that saw the high power draw on the PCI slot, how many saw it across all the benchmarks?

Or was it just a few benchmarks/games?

I remember modding my bios of my 970 many many times, and while I had no way to measure that actual wattage from the PCI slot. I do remember that the original bios has a value of 66w/100% with 75w at 114%. I also remember setting these to 79w at both settings....no issues. No restarts, no BSOD, etc.

I think most users that OC can throw out the TDP for most cards....once you OC or put a big load on the card, the original TDP gets tossed aside like a rag doll. The 970 is supposed to draw a max of 201w. I can routinely hit over that with many games/benchmarks. In fact, both of my cards will pull around 220+w just playing BF4. That increases to around 240w at 1440p.

I can see where this might be an issue for the average joe, but not for those that use quality components.

I remember reading in the thread or the RX480 review thread that some think these were chips that didn't make the grade for the consoles....they might be right. I've never bought a reference board, and don't plan on buying one in the future. It appears to me that both companies like to set the bios' to reflect their marketing. Hence, they cherry-pick the slides.

It will be interesting to see over the next few days(weeks) how this all plays out. My suggestion if you have purchased these cards is don't OC until this has been resolved. If you have a high end board, and quality PSU....then go for it!! biggrin.gif

EDIT: Screen shot of my cards after gaming at 1440p: Warning: Spoiler! (Click to show)

Edited by Hequaqua - 6/30/16 at 7:56am
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