Smicha,smicha wrote:Guys,
Any advice when there are only 4 gpus visible in windows and there are more on board? Is there anything I can do apart from clean reinstall of nvidia drivers?
They (7) were visible all when connected via DP cable to the highest card. When connected to lowest via DVI only 4 of them are visible. When HDMI cable was used same thing. Now DP cable is connected to the 1st cards and only 4 are visible... Any clues?
This assumes that GPUs are in working order and properly seated and cables (could be PCI-e or splitter or riser) are in working order and properly seated. Since I often move my GPUs between systems, I've yet to find that the following [or my modification of it - described in the footnote] doesn't dispel those ghosts, even in situations that are just as you describe [ so consider the following introduction by Otoy to be under-inclusive of the situations where the numbered steps [ or my mod of it - see footnote ] work */]:
"Windows and the Nvidia driver see all available GPU’s, but OctaneRender™ does not.
There are occasions when using more than two video cards that Windows and the Nvidia driver properly register all cards, but OctaneRender™ does not see them. This can be addressed by updating the registry. This involves adjusting critical OS files, it is not supported by the OctaneRender™ Team.
1) Start the registry editor (Start button, type “regedit” and launch it.)
2) Navigate to the following key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E968-E325-11CE-BFC1-08002BE10318}
3) You will see keys for each video card starting with “0000″ and then “0001″, etc.
4) Under each of the keys identified in 3 for each video card, add two dword values:
DisplayLessPolicy
LimitVideoPresentSources
and set each value to 1
5) Once these have been added to each of the video cards, shut down Regedit and then reboot.
6) OctaneRender™ should now see all video cards." [ https://docs.otoy.com/#sector_9 ]
*/ In particular situations where just following the above steps once doesn't work, I've found success by loading the number of GPUs that load without issue; then perform the above listed steps; then shutdown; then add one more GPU; then restart; then repeat the whole process as each additional GPU is added. Once all GPUs have been added successfully, I perform the process once more to better accommodate the next addition.
