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Author Topic: 7xGPU + Windows // modding AMD video driver is the answer  (Read 71680 times)
hero18688
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August 23, 2014, 12:12:52 AM
 #21

Hi,OP.My rigs lost audio after implemented this reg mod.It acts as HTPC sometimes.Can you post one without disabling the audio?

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lbr (OP)
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August 23, 2014, 02:56:03 AM
 #22

Hi,OP.My rigs lost audio after implemented this reg mod.It acts as HTPC sometimes.Can you post one without disabling the audio?

You have 5+ GPUs in HTPC? ; )

You can edit mod reg file before importing it. For example delete all lines setting DP_DisableHBR2. That way maybe you will find the key affecting audio. Probably this one - DalNumSupportedHDMIConnections.

Since I don't use audio from GPUs and don't have any device which can use audio from GPU there is no way I can find which setting causes it.

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hero18688
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August 24, 2014, 02:57:57 PM
 #23

Hi,OP.My rigs lost audio after implemented this reg mod.It acts as HTPC sometimes.Can you post one without disabling the audio?

You have 5+ GPUs in HTPC? ; )

You can edit mod reg file before importing it. For example delete all lines setting DP_DisableHBR2. That way maybe you will find the key affecting audio. Probably this one - DalNumSupportedHDMIConnections.

Since I don't use audio from GPUs and don't have any device which can use audio from GPU there is no way I can find which setting causes it.
Thanks.problem solved

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August 24, 2014, 05:38:33 PM
 #24

Is there any way to do this with Nvidia 750ti cards?


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lbr (OP)
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August 25, 2014, 03:22:07 AM
 #25

Is there any way to do this with Nvidia 750ti cards?

What is the issue with nVidia cards exactly?

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September 23, 2014, 08:53:55 PM
 #26

This post hasn't been updated in a while I'm just wondering if you are still maintaining it? OP doesn't state if 14.7 R3 is supported, so I thought I'd ask, and if newer versions will be supported as they come out? I don't even know if newer versions than 14.6 help with any hash rates, but I'd like to find out! All my rigs are 6-7 card rigs tho
lbr (OP)
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September 26, 2014, 05:33:52 PM
 #27

OP doesn't state if 14.7 R3 is supported

OP does state this, tho -
Supported driver versions and operating systems
Any Windows and any AMD driver version should be supported in theory.

Anyway, if you try it and it won't work, I'll take a look.

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September 26, 2014, 06:09:39 PM
 #28

OP doesn't state if 14.7 R3 is supported

OP does state this, tho -
Supported driver versions and operating systems
Any Windows and any AMD driver version should be supported in theory.

Anyway, if you try it and it won't work, I'll take a look.


It works perfectly with 14.7 RC3. Thanks for the great tool!
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October 02, 2014, 09:00:46 PM
 #29

Windows 8.1 64
4x AMD7990 - 8 GPU
Have no problems running on 14.4, 14.6 etc but i have 6 7990 Smiley Is there any way to start more than 8 gpu on windows 8.1. I have readed somewhere that this is driver issue! When i try to start the system it shows me error in ATIKMPG or something like this. Help if it is possible.
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October 03, 2014, 08:33:20 AM
 #30

Windows 8.1 64
4x AMD7990 - 8 GPU
Have no problems running on 14.4, 14.6 etc but i have 6 7990 Smiley Is there any way to start more than 8 gpu on windows 8.1. I have readed somewhere that this is driver issue! When i try to start the system it shows me error in ATIKMPG or something like this. Help if it is possible.

I cannot make more than 8 GPU work. I tried 3x7990+3x7970. It will crash the computer. Win 8 and 8.1 were used.
hero18688
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October 03, 2014, 01:11:34 PM
 #31

Not compatible with 14.9.Please update.

alexbg21
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October 03, 2014, 05:04:15 PM
 #32

4 x 7990 - 8 GPU and no more possible! I was thinking it is windows limitation but now i'm almost sure that this is AMD driver issue. Today i installed two Nvidia750 Ti to check whas goin on and there is no problem. 10 GPU! I will make sceenhot tomorrow and will post it here! If somebody is familiar with AMD drivers plese help to improve if its possible, drivers to support 10 or more GPU Wink
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October 03, 2014, 05:52:46 PM
 #33

GIGABYTE 990FXA UD3 motherboard, FX 8320, 4 X 2 GB RAM.
I tried prepatched drivers 14.4. Also 14.6 RC2 and patched it. Actually i have no problems running 4 X 7990 without any modded drivers. The problem comes when i install 5th 7990 which adds two more GPUs. Thes it installs driver and after restart when windows 8.1 is loading appears some kind of blue screen where is written that ATIKMPG of something like this file caused problem and windows will restart trying to fix this problem. It is always the same no matter which driver i use. Modded or not. Later i removed 5th 7990 and just disabled 2 of the cores. Then put again 5th VGA and windows started normally. When i try to enable 9th GPU windows crashes with the same blue screen with counter to restart trying to fix (atikmpag.sys) Smiley  Ok. Somebody tall me that windows have 8 GPU limitation which could not be removed. I think it is not true!!!
Today i installed two Nvidia750 Ti to check what is going on and there is no problem. 4 X 7990 which is 8 GPU and two Nvidia GPU was installed correctly and also mining at this moment! I will make screenshot later and will post it in topic! If somebody is familiar with AMD drivers please help to improve it if its possible AMD drivers to support 10 or more GPU.
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October 03, 2014, 09:37:11 PM
 #34

GIGABYTE 990FXA UD3 motherboard, FX 8320, 4 X 2 GB RAM.
I tried prepatched drivers 14.4. Also 14.6 RC2 and patched it. Actually i have no problems running 4 X 7990 without any modded drivers. The problem comes when i install 5th 7990 which adds two more GPUs. Thes it installs driver and after restart when windows 8.1 is loading appears some kind of blue screen where is written that ATIKMPG of something like this file caused problem and windows will restart trying to fix this problem. It is always the same no matter which driver i use. Modded or not. Later i removed 5th 7990 and just disabled 2 of the cores. Then put again 5th VGA and windows started normally. When i try to enable 9th GPU windows crashes with the same blue screen with counter to restart trying to fix (atikmpag.sys) Smiley  Ok. Somebody tall me that windows have 8 GPU limitation which could not be removed. I think it is not true!!!
Today i installed two Nvidia750 Ti to check what is going on and there is no problem. 4 X 7990 which is 8 GPU and two Nvidia GPU was installed correctly and also mining at this moment! I will make screenshot later and will post it in topic! If somebody is familiar with AMD drivers please help to improve it if its possible AMD drivers to support 10 or more GPU.

I have same experience. I cannot make 9-10 AMD GPU work.
alexbg21
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October 03, 2014, 10:58:59 PM
 #35

It is not so difficult to start 8 AMD GPU and 2 NVIDIA and may be even more but i have to buy pci-e expander first to chek this. The only thing is that you have to connect one monitor to one of AMD cards and other to one of NVIDIA otherwise you will have problems with sgminer and msi afterburner. Windows 7 and 8 do almost same results.
lbr (OP)
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October 05, 2014, 12:46:32 AM
 #36

GIGABYTE 990FXA UD3 motherboard, FX 8320, 4 X 2 GB RAM.
The problem comes when i install 5th 7990 which adds two more GPUs. Thes it installs driver and after restart when windows 8.1 is loading appears some kind of blue screen where is written that ATIKMPG of something like this file caused problem and windows will restart trying to fix this problem.

And if no AMD driver is installed?
Have you tried adding more RAM?
Do you see BIOS on the monitor?

Anyway, if this is AMD driver issue, maybe I will be able to mod the driver, pm me.

Btw, what's ur motherboard revision?

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lbr (OP)
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October 05, 2014, 12:53:50 AM
 #37

Not compatible with 14.9.Please update.

Sure, however I need access to 6+GPU rig.
Mine are at remote(very) location, also they are equipped with IDE HDDs, and since modding driver requires a lot of reboots and sometimes rigs hang, it is too painfull for me.

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October 08, 2014, 07:11:50 PM
Last edit: October 23, 2014, 10:25:02 PM by alexbg21
 #38

Still no success with more than 8 AMD GPU on windows. I think kernel file makes problem, but success with 4 X 7990 and two GTX 970 plus CPU mining - all 45 Mhs on X11 !!! 8 GPU limit per windows is MYTH. This is absolutely not true!!! These days i will buy pcie expander card and will try to add three more GTX 970 Wink In windows 8.1 i did not connect any monitor like it was it windows 7. Everithing works perfect.

8+GPU works only on GIGABYTE 990FXA-UD3 Rev. 4.0 (Revision 1.2/2.0/3.0 and GYGABYTE 990FXA-UD5 which i tested have bios issue for 8+GPU). Asrock H81PRO BTC - only 7 GPU!!! I think this board have bios bug or something like that. Till now GIGABYTE 990FXA-UD3 Rev. 4.0 is best for support multiple GPU but do not try to switch more than 10 GPU - South bridge will die !!! 2 of my board are death now, trying to switch on 11th GPU Smiley

https://imageshack.com/i/exWBHEs3j

https://imageshack.com/i/kqcGXV1Hj

-------------------------------------------
windows 8 gpu limit
8 gpu limit
Maximum Gpus windows 8
Windows GPU limit
-------------------------------------------

As i understood problem is in these two files:

amdkmdag.sys   c:\windows\system32\drivers\atikmdag.sys
amdkmdap.sys   c:\windows\system32\drivers\atikmdap.sys
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October 20, 2014, 12:34:50 AM
 #39

Still no success with more than 8 AMD GPU on windows. I think kernel file makes problem, but success with 4 X 7990 and two GTX 970 plus CPU mining - all 45 Mhs on X11 !!! 8 GPU limit per windows is MYTH. This is absolutely not true!!! These days i will buy pcie expander card and will try to add three more GTX 970 Wink In windows 8.1 i did not connect any monitor like it was it windows 7. Everithing works perfect.

https://imageshack.com/i/exWBHEs3j

https://imageshack.com/i/kqcGXV1Hj

-------------------------------------------
windows 8 gpu limit
8 gpu limit
Maximum Gpus windows 8
Windows GPU limit
-------------------------------------------

As i understood problem is in these two files:

amdkmdag.sys   c:\windows\system32\drivers\atikmdag.sys
amdkmdap.sys   c:\windows\system32\drivers\atikmdap.sys


Very impressive.  Nice job.  I remember having issues with just 5 before this mod came out...
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October 20, 2014, 06:53:07 AM
 #40

Windows 8.1 64
4x AMD7990 - 8 GPU
Have no problems running on 14.4, 14.6 etc but i have 6 7990 Smiley Is there any way to start more than 8 gpu on windows 8.1. I have readed somewhere that this is driver issue! When i try to start the system it shows me error in ATIKMPG or something like this. Help if it is possible.

Oh man, do you really need to run so many GPU on 1 motherboard...


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