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AMD 16.8.1 + 16.8.2 Memory Clocks Not Working

post #1 of 47
Thread Starter 
I would like to make a request of everyone running AMD's 16.7.3, 16.8.1, 16.8.2, 16.8.3, 16.9.1, 16.9.2, or 16.10.1 drivers with any video card, but especially Fiji and Polaris.

As some here may already know, I discovered that my Sapphire Nitro+ RX 470 4GB was not scaling with memory clocks at all. I could set maximum memory clocks and see no gain in performance, or even see a loss, without HWInfo showing a single memory error.

After returning that card and purchasing an XFX RX 480 8GB GTR I discovered the same problem - I could set any memory clock, but gain no performance. When I downgraded to 16.7.2 drivers, however, I immediately gained performance almost perfectly linearly with memory clocks:






With the 16.8.2 driver, scaling is like this:



As in, there's a loss of performance at any speed above stock, and it's pretty much flat (this was just one run each, whereas the former charts are 2 runs averaged together, making things smoother - still, I'm rather consistent in my runs).

GPU-Z, HWInfo, etc.. all show higher clocks being set, but the screen does not flicker when the memory clocks are set and there is a performance loss for any value other than the default, and no gain with higher frequencies.

I need as many people as possible to do similar testing, though you don't need to be fancy with charts or test as many frequencies.

If your screen flickers when you set the memory clocks, then the memory settings are likely being set. If it does not flicker, then I believe the memory clocks are not actually being set, despite what GPU-z et. al. reports.

Your help is appreciated!

--The loon

UPDATE:

Also, when testing, please lock your GPU clocks! Set manually temperature targets and +50% power target, and use a fixed clock speed! Otherwise we'll have no idea what the results mean thumb.gif

UPDATE 2:

I have now tested every version after 16.7.2 - up to 16.9.1 - and all of them exhibit the same problem for me.

I have filed two reports with AMD - a tech support request and a driver issue report. No response at this time.

UPDATE 3:

I have now received a couple of responses from AMD tech support, but they have been incredibly stupid responses that seems to demonstrate that they are incapable of understanding the problem. Their last email suggested I upgrade to 16.9.1 to fix my "utilization issue."

"Please be infirmed AMD released 16.9.1 version graphics driver recently and the issue currently fixed in the latest driver version 16.9.1. "

This is a driver I specifically already mentioned I tested and which exhibits the same problem. I know I'm dealing with the lowest tier techs here, but come on!

UPDATE 4:

Escalated by AMD support on 9/20/2016.
Tested 16.9.2 with no change - issue still present.

UPDATE 5:

I received feedback from AMD... and almost missed the response! Took me a week to notice it, not sure how it became marked as read.... may have assumed it was the stupid auto-response they give.

Matt B ran quite a few tests, but saw performance scaling with memory clocks. Once I noticed the email, I replied with the following graph to show how underclocking makes it more obvious (and is more important to me...):



I received a response rather quickly (on 10/4/2016)
Quote:
I love overclocking and tweaking so i was trying my best to recreate the issue you described. That's the fun part of the job!

I'll let you know if i manage to reproduce it and if i do, I'll file a ticket to get it fixed internally.

Edited by looncraz - 10/5/16 at 6:48pm
post #2 of 47
I have two RX480s. I'm on 16.8.2. I will test this with 3D mark and see if there is a difference in score. I will let you know.

AMD drivers so far have been really crap. frown.gif
    
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post #3 of 47
Does synthetic bench count?

290 1200 core/Stock memory

http://www.3dmark.com/3dm/14292809

290 1200 core/1500 memory

http://www.3dmark.com/3dm/14292898

16.8.2 without Overdrive. Also, I don't use DDU. I'll run crossfire, too, if needed.
Edited by rdr09 - 8/21/16 at 6:52am
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post #4 of 47
card 1: 1320/2250
card2: 1300/2200

Fire Strike Ultra (Click to show)
Run1


Run2

Fire Strike Extreme (Click to show)
Run1


Run2


Run3



card 1: 1320/2000
card2: 1300/2000
Fire Strike Ultra (Click to show)
Run1



Run2

Fire Strike Extreme (Click to show)
Run1



Run2



Run3


Scores are all over the place with fire strike ultra. I noticed my core clock is ranging between 1250 and 1320 while running graphics test 1. I'm pretty sure I was hitting power limit. Temps were around 75C most of the time.

I added Fire Strike Extream scores which had very minimal core frequency dips. Core frequency ranged from 1300 to 1320 on card 1 and on card 2 the frequency never changed.

Fire Strike Extreme 3 runs average with memory clock of 2000MHz
11,633

Fire Strike Extreme 3 runs average with memory clock of 2200/2250MHz
11,945
Edited by Fantasy - 8/21/16 at 7:37am
    
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post #5 of 47
Scores will be all over the place if you are getting memory errors or TDP throttling.

I'm getting linear scaling with 16.8.2, with easily repeatable results on my RX 470.
Edited by KarathKasun - 8/21/16 at 7:29am
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post #6 of 47
Quote:
Originally Posted by KarathKasun View Post

Scores will be all over the place if you are getting memory errors or TDP throttling.

I'm getting linear scaling with 16.8.2, with easily repeatable results on my RX 470.

Yeah, I think I was hitting power limit.
    
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post #7 of 47
Thread Starter 
Quote:
Originally Posted by Fantasy View Post

Yeah, I think I was hitting power limit.

Does your screen flicker when you set memory clocks? That seems to be the giveaway of whether or not the clocks are actually being set and respected.

I've observed this on two systems with two cards and four different Windows installations, so it's definitely happening mad.gif
post #8 of 47
Nope. Screen never flicker. Although I don't think it ever did for me on 16.7.2. But don't quote me on that. I don't remember.
I'm actually going to try 16.7.2 and see if there is any difference in scores.
    
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post #9 of 47
Thread Starter 
Quote:
Originally Posted by Fantasy View Post

Nope. Screen never flicker. Although I don't think it ever did for me on 16.7.2. But don't quote me on that. I don't remember.
I'm actually going to try 16.7.2 and see if there is any difference in scores.

That would be a good way forward! Also make sure you don't allow any throttling (even if you have to underclock the card), and also do non-crossfire testing.
post #10 of 47
Here are the results.
3Dmark Fire Strike Extreme Custom Run. Graphics test 1 and 2.

Driver 16.7.2


Core/Memory 1225/2000
  • Run 1: 5,533
  • Run 2: 5,458
  • Run 3: 5,578
  • Avarage: 5,523

Core/Memory 1225/2100
  • Run 1: 5,636
  • Run 2: 5,615
  • Run 3: 5,615
  • Avarage: 5,622

Core/Memory 1225/2250
  • Run 1: 5,709
  • Run 2: 5,652
  • Run 3: 5,762
  • Avarage: 5,707




Driver 16.8.2

Core/Memory 1225/2000
  • Run 1: 5,605
  • Run 2: 5,519
  • Run 3: 5,492
  • Avarage: 5,538

Core/Memory 1225/2100
  • Run 1: 5,604
  • Run 2: 5,498
  • Run 3: 5,633
  • Avarage: 5,578

Core/Memory 1225/2200
  • Run 1: 5,719
  • Run 2: 5,724
  • Run 3: 5,628
  • Avarage: 5,690

Core/Memory 1225/2250
  • Run 1: 5,629
  • Run 2: 5,614
  • Run 3: 5,622
  • Avarage: 5,621


Well what do you know, you were right !
Edited by Fantasy - 8/21/16 at 10:16am
    
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