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[Guru3D]AMD Gives Statement on the PCI-Express Overcurrent Problems

post #1 of 40
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Quote:
"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)."

Looks like AMD plans to reduce the speed of the memory (which from what I understand they put their blame on) to handle the issue.
I wonder if this is also going to hinder OC because of lower locked memory speeds if that is what they are going to do.

So overall I guess the RX 480 isn't going to perform according to all the recent reviews. I wonder if they are all going to re-review the card after AMD puts a fix driver.
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post #2 of 40
I am curious how they plan on addressing this via drivers. They can either attempt to under-volt the cards, and hopefully all the ones out already are fine and run under-volt, or they lower clocks speeds. Either case is going to result in a mess for AMD on some level.
    
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post #3 of 40
4GB has been immune from all these issues but there 2 versions of the 4gb out at the moment.
1 version is just the 8gb with different bios to disable ram and drop its speed. Other version has only 4 chips with the lower clock speed.

All the review cards had all 8 chips, Retail seems to be luck of the draw.

Going to be interesting to see how they fix it since so far people dropping the power limit or undervolting it has made a massive difference on the 8gb cards so I dont think they will downclock the memory.
post #4 of 40
Thread Starter 
Quote:
Originally Posted by bmgjet View Post

4GB has been immune from all these issues but there 2 versions of the 4gb out at the moment.
1 version is just the 8gb with different bios to disable ram and drop its speed. Other version has only 4 chips with the lower clock speed.

All the review cards had all 8 chips, Retail seems to be luck of the draw.

Going to be interesting to see how they fix it since so far people dropping the power limit or undervolting it has made a massive difference on the 8gb cards so I dont think they will downclock the memory.

From what I understand only the review cards were 8GB with disabling bios.
The retails are all 4GB with less chips only, and not bios disabled. I doubt AMD will waste chips on cards.
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post #5 of 40
Please correct me if I'm wrong but aren't the 8GB reference SKUs running at 8GHz and the 4GB ones at 7GHz?

Maybe AMD just decided that they are going to just make all RX 480 reference models including the the 8GB SKU to run at 7GHz effective for the memory.
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post #6 of 40
I'm sure AIB's are celebrating, no one wants a gimped reference Stuporclocked Edition.
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post #7 of 40
Quote:
Originally Posted by The Robot View Post

I'm sure AIB's are celebrating, no one wants a gimped reference Stuporclocked Edition.
Damn i lmao. Thats a good one. biggrin.gif
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post #8 of 40
Quote:
Originally Posted by bmgjet View Post

Other version has only 4 chips with the lower clock speed.

So are you saying that there are RX 480 cards with 128-bit memory interface out there?
post #9 of 40
Quote:
Originally Posted by PostalTwinkie View Post

I am curious how they plan on addressing this via drivers. They can either attempt to under-volt the cards, and hopefully all the ones out already are fine and run under-volt, or they lower clocks speeds. Either case is going to result in a mess for AMD on some level.

If they reduce voltage, not all cards will be stable. So, they'll perhaps reduce speeds at full load, which could destroy overclockability. However we look at it, the RX 480 reference design is becoming a disaster. How will the driver tweaks fair with the performance and overclockability of aftermarket varients I wonder?
Edited by BradleyW - 7/3/16 at 6:07am
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post #10 of 40
Thread Starter 
Quote:
Originally Posted by BradleyW View Post

If they reduce voltage, not all cards will be stable. So, they'll perhaps reduce speeds at full load, which could destroy overclockability. However we look at it, the RX 480 reference design is becoming a disaster. How will the driver tweaks fair with the performance and overclockability of aftermarket varients I wonder?

AIB cards might not even have that issue, as the boards are self designed, and most likely they will be able to handle it. More power through direct PSU instead of motherboard should solve it overall with the right design.

I guess if AMD force to under-volt and reduce speeds to make the cards stable, review sites will do new reviews to see how this affects the cards performance.
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