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Guru3D.com » News » AMD Gives Statement on the PCI-Express Overcurrent Problems

AMD Gives Statement on the PCI-Express Overcurrent Problems

by Hilbert Hagedoorn on: 07/02/2016 11:37 AM | source: | 246 comment(s)
AMD Gives Statement on the PCI-Express Overcurrent Problems

AMD just issued a small statement on the PCI-Express over-current Issues mentioned and reported on the web. It seems that the Radeon RX 480 reference cards are going over spec using more than 75 Watts over the PCI-Express slot and then another 75 Watt over the 6-pin power connector. 

If you pull over 75 Watts from the motherboard slot, it will place more strain on it and some motherboards might note cope with that very well. To that end and to solve the issues reported they will address this issue in software. The cards do exceed 150 Watts, in fact we measured it at 166 Watts. Here is that statement:

"We continuously tune our GPUs in order to maximize their performance within their given power envelopes and the speed of the memory interface, which in this case is an unprecedented 8 Gbps for GDDR5. Recently, we identified select scenarios where the tuning of some RX 480 boards was not optimal. Fortunately, we can adjust the GPU's tuning via software in order to resolve this issue. We are already testing a driver that implements a fix, and we will provide an update to the community on our progress on Tuesday (July 5, 2016)."

If this is fixed by software (driver) this likely means it will be throttling down if it hits a certain power state, so if a higher than 150 Watt power state is reached, AMD might be throttling down the cards in the future to meet the proper P state. Yesterday we have been performing some additional stress tests ourselves and cannot replicate the issues mention on the web. We do see a minor increase of temperature on the PCI-Express slot, but nothing rather concerning. Yesterday we updated the FLIR images in our reference review to show that.
  







« G.SKILL Offers Nice Software Update for the RIPJAWS KM780 RGB · AMD Gives Statement on the PCI-Express Overcurrent Problems · Sapphire Radeon RX 480 Nitro »

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Devilhunter12



Posts: 71
Joined: 2016-01-18

#5299601 Posted on: 07/02/2016 11:53 AM
Of course they will lower the clocks of 480 and card will throttle. AMD is doing a very simple logic.

__hollywood|meo
Senior Member



Posts: 2990
Joined: 2005-09-27

#5299602 Posted on: 07/02/2016 11:54 AM
theyre having a field day trolling at about this. the discussions ceiling is so low i cant be bothered to chime in there. more on topic, im glad AMD is doing something about this problem quickly however. making mistakes isnt wat we should base judgement on; its how mistakes are addressed & rectified that matters...coming from someone who has owned plenty of team greens gpus over the years

Devilhunter12
Senior Member



Posts: 71
Joined: 2016-01-18

#5299604 Posted on: 07/02/2016 11:56 AM
theyre having a field day trolling at about this. the discussions ceiling is so low i cant be bothered to chime in there. more on topic, im glad AMD is doing something about this problem quickly however. making mistakes isnt wat we should base judgement on; its how mistakes are addressed & rectified that matters...coming from someone who has owned plenty of team greens gpus over the years


They will lower the clocks and their is no other logically way.

pharma
Senior Member



Posts: 1941
Joined: 2003-09-10

#5299611 Posted on: 07/02/2016 12:08 PM
According to Ryan Smith it could affect reviews depending on what the root cause is.

"If power is somehow being wasted and it can be stopped (think leaking hose) then no. However if the issue is that power consumption is just being allowed to go too high (think a hose turned up higher) then yes, the card would need to be throttled back to avoid breaking power containment."

I guess nobody can blame AMD for last minute clocks/voltage changes to be more competitive, but they forgot (or turned blind eye) PCI-E certification. Seems like reviews will need to be redone ....

WhiteLightning
Moderator



Posts: 29367
Joined: 2007-09-19

#5299614 Posted on: 07/02/2016 12:11 PM
If they will lower the clocks, i wonder how much of a difference it will make with benchmark scores. not that much i reckon. In any way it is sloppy work if it falls out of specification.

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