Wednesday, August 17th 2016
High PCIe Slot Power Draw Costs RX 480 PCI-SIG Integrator Listing
AMD's design of the Radeon RX 480 graphics card, which draws over 75W of power from the PCI-Express x16 slot, has cost it a product listing on the PCI-SIG Integrators List. The list is compiled for hardware devices implementing the various PCI-Express specifications to the letter. The RX 480 is off-spec, in that it overdraws power from the slot, as the card needs more power than what the slot and the 6-pin PCIe power connector can provide while staying within specs. According to these specs, the slot can provide up to 75W of power, and the 6-pin connector another 75W. The RX 480 was tested to draw more than this 150W power budget.
What this means for AMD is that it cannot display the PCI-Express certification logo on the product or its marketing materials. This, however, may not affect AMD's add-in board (AIB) partners that are PCI-SIG members in their own right, and make graphics cards with their own sub-vendor IDs, provided their power-supply designs comply with PCIe specs. Custom-design cards with an 8-pin PCIe power connector, instead of 6-pin, may qualify as the combination of the 8-pin connector and the slot yields a power budget of 225W. AMD released a software fix to the issue of the cards overdrawing power from the slot, with the Radeon Software Crimson Edition 16.7.1 Beta.
Source:
Heise.de
What this means for AMD is that it cannot display the PCI-Express certification logo on the product or its marketing materials. This, however, may not affect AMD's add-in board (AIB) partners that are PCI-SIG members in their own right, and make graphics cards with their own sub-vendor IDs, provided their power-supply designs comply with PCIe specs. Custom-design cards with an 8-pin PCIe power connector, instead of 6-pin, may qualify as the combination of the 8-pin connector and the slot yields a power budget of 225W. AMD released a software fix to the issue of the cards overdrawing power from the slot, with the Radeon Software Crimson Edition 16.7.1 Beta.
63 Comments on High PCIe Slot Power Draw Costs RX 480 PCI-SIG Integrator Listing
This is from wiki so no guarantees:
"Some cards are using two 8-pin connectors, but this has not been standardized yet, therefore such cards must not carry the official PCI Express logo. This configuration would allow 375 W total (1×75 W + 2×150 W) and will likely be standardized by PCI-SIG with the PCI Express 4.0 standard."
. . . . . . .I don't even know what to say about that.
It should be up to manufacturers to ensure they comply to qualify.
It's no different than automobile manufacturers conducting their own crash tests for compliance in that standard.
Funny how that works, eh.
"And yes with the fix it is still not compliant it is 75 Watt from the slot and 75watt from 6 pin, not 84Watt from the 6 pin."
Regarding the 970:
It has 4GB memory the issue is that the last 0.5gb is not full speed (can't figure out if it is the total 4GB that is slowed down or only the 0.5gb??)
Too little too late!
They make a topic out of something non-existant atm and didn't notice once it was at least existant.
Ridiculous announcement by them (not TPU) to sum it up...
3,5 gb - 224 bit bus
0,5 gb - 32 bit bus
So compared to a 980 all memory access is slower. You only uses/gets the advertised 256 bit memory bus when accessing data from faster "partition" and slower one at the same time.
Even with the fixed driver, this violates the standard
www.techpowerup.com/img/16-07-08/rx-480-pcie-fix-power.jpg
OK
Again from Wiki so.....
For accessing its memory, the GTX 970 stripes data across 7 of its 8 32-bit physical memory lanes, at 196 GB/s. The last 1/8 of its memory (0.5 GiB on a 4 GiB card) is accessed on a non-interleaved solitary 32-bit connection at 28 GB/s, one seventh the speed of the rest of the memory space. Because this smaller memory pool uses the same connection as the 7th lane to the larger main pool, it contends with accesses to the larger block reducing the effective memory bandwidth not adding to it as an independent connection could
and what does this have to do with the 970, . . . . I miss something?
practicalphysics.org/explaining-rms-voltage-and-current.html
RMS:Just because some site created a video with an oscilloscope and then provided a convoluted method of filtering and talked about spikes doesn't make you all the sudden smarter than the industry.
Here's the page on August 9th
And here it is on the 8th
That's the furthest back I can check that's still after the Rx480 launched. Is there any evidence to the contrary since this article doesn't provide any.
nvm they are listed by the chip name. Which is silly because the chip is not the entire gpu+board...
Wondering what this list really is. Because you would expect several versions of each chip to correlate with the board design, but for everything there is only one listed.
Lots of cards are missing.
But that is just my opinion.
and if you are looking at a 1080 why on earth do you care about a 290 rebrand instead of a 480? At best you should be saying vega is taking forever.
Here's the last paragraph of the conclusion which says that it's fixed (heck the title of the article says it's fixed) especially with compatibility mode which maxes it out at 73W. Without compatibility mode it averages 76W with peaks of 79W which is what the graph you linked to shows and isn't a problem for all but the crappiest of motherboards.And here's the link if you wanna read the whole thing in context: www.techpowerup.com/223981/amd-releases-pci-express-power-draw-fix-we-tested-confirmed-works