msi z270 sli plus windows 7 m.2 to pcie 7th GPU not working

[icehouse]

Hi Miners,

I am trying to get 7th GPU to work in my system (MSI Z270 SLI Plus, Windows 7)
I have 6 Nvidia GPU working in the system (1080x3 + 1060x3)
but I am not able to make the 7th GPU work.

I bought a m.2 to pcie converter. I was able to see 7th gpu in device manager but disabled.
when I try to enable it, the system crashed. them for the past few days, I was not able to see the 7th gpu
in device manager anymore. what when wrong?

my questions are:
1) the m.2 to pcie converter come with a sata power cable. do I need to connect it to power?

2) in bios, do i need to make any change?

3) Does windows 7 has limitation on number of GPU supported?

Thanks!

[icehouse]

pump

[Grim]

-   Start Menu
-   Under Search type: Regedit (Press Enter)
-   Navigate to the following directory:
o   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E968-E325-11CE-BFC1-08002BE10318}
-   You will see directories labeled “0000”, “0001” and so on that are relative to the total amount of cards.
-   Under each of those Keys (eg. 0000) create the following two Dword values, once created set their value to 1
o   DisplayLessPolicy
o   LimitVideoPresentSources
-   You can create the Dword by right clicking on the key and NEW  DWORD


https://devtalk.nvidia.com/default/topic/738070/cuda-setup-and-installation/8x-gpu-gtx-issue-under-windows/post/4208565/#4208565

[icehouse]

Thank You Grim!
It works
Really tricky... if u don't tell me. I think i will never make it works.
Thank you again!

-   Start Menu
-   Under Search type: Regedit (Press Enter)
-   Navigate to the following directory:
o   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E968-E325-11CE-BFC1-08002BE10318}
-   You will see directories labeled “0000”, “0001” and so on that are relative to the total amount of cards.
-   Under each of those Keys (eg. 0000) create the following two Dword values, once created set their value to 1
o   DisplayLessPolicy
o   LimitVideoPresentSources
-   You can create the Dword by right clicking on the key and NEW  DWORD


https://devtalk.nvidia.com/default/topic/738070/cuda-setup-and-installation/8x-gpu-gtx-issue-under-windows/post/4208565/#4208565

[icehouse]

Hi Grim,

need help again! I follow your steps to modify windows registry. windows 7 finally can see the 7th gpu.
then i start mining... but it crashed last night. I don't know it was hanging or something. As I don't have monitor
connected to it. I am not able to VNC to it. and from the pool report. it was not mining.

Anything that I am missing?

Thanks

-   Start Menu
-   Under Search type: Regedit (Press Enter)
-   Navigate to the following directory:
o   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E968-E325-11CE-BFC1-08002BE10318}
-   You will see directories labeled “0000”, “0001” and so on that are relative to the total amount of cards.
-   Under each of those Keys (eg. 0000) create the following two Dword values, once created set their value to 1
o   DisplayLessPolicy
o   LimitVideoPresentSources
-   You can create the Dword by right clicking on the key and NEW  DWORD


https://devtalk.nvidia.com/default/topic/738070/cuda-setup-and-installation/8x-gpu-gtx-issue-under-windows/post/4208565/#4208565

[Nexillus]

Hi Grim,

need help again! I follow your steps to modify windows registry. windows 7 finally can see the 7th gpu.
then i start mining... but it crashed last night. I don't know it was hanging or something. As I don't have monitor
connected to it. I am not able to VNC to it. and from the pool report. it was not mining.

Anything that I am missing?

Thanks

-   Start Menu
-   Under Search type: Regedit (Press Enter)
-   Navigate to the following directory:
o   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E968-E325-11CE-BFC1-08002BE10318}
-   You will see directories labeled “0000”, “0001” and so on that are relative to the total amount of cards.
-   Under each of those Keys (eg. 0000) create the following two Dword values, once created set their value to 1
o   DisplayLessPolicy
o   LimitVideoPresentSources
-   You can create the Dword by right clicking on the key and NEW  DWORD


https://devtalk.nvidia.com/default/topic/738070/cuda-setup-and-installation/8x-gpu-gtx-issue-under-windows/post/4208565/#4208565

This base settings or did you apply an OC on it?
Have the GPU's / risers known to be good?
What nvidia driver are you using ?
Have you checked logs to see how it crashed? BSOD? Nvidia driver stopped and started?

[icehouse]

Hi Grim,

need help again! I follow your steps to modify windows registry. windows 7 finally can see the 7th gpu.
then i start mining... but it crashed last night. I don't know it was hanging or something. As I don't have monitor
connected to it. I am not able to VNC to it. and from the pool report. it was not mining.

Anything that I am missing?

Thanks

-   Start Menu
-   Under Search type: Regedit (Press Enter)
-   Navigate to the following directory:
o   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E968-E325-11CE-BFC1-08002BE10318}
-   You will see directories labeled “0000”, “0001” and so on that are relative to the total amount of cards.
-   Under each of those Keys (eg. 0000) create the following two Dword values, once created set their value to 1
o   DisplayLessPolicy
o   LimitVideoPresentSources
-   You can create the Dword by right clicking on the key and NEW  DWORD


https://devtalk.nvidia.com/default/topic/738070/cuda-setup-and-installation/8x-gpu-gtx-issue-under-windows/post/4208565/#4208565

This base settings or did you apply an OC on it?
Have the GPU's / risers known to be good?
What nvidia driver are you using ?
Have you checked logs to see how it crashed? BSOD? Nvidia driver stopped and started?

Thanks Grim,

I didn't over clock on the 7th gpu. riser should be good as i changed a good riser from other working machine.
i am running GeForce Game Ready Driver version 391.01
I finally about to see how it crash. 7 gpu are showing in device manager. windows are stable.
6 gpu running, windows are stable. but once 7 gpu are running. windows will become slower and slower until like hanging.

I am trying to look at windows event log but not able find any useful info.

Thank for your help again.