This just worked for me!
Sorry if repost
I set mine to two cards and not three. 100fps now maxed with 99% usage both cards.
1. Download Nvidia Inspector from
http://www.guru3d.com/files-get/nvidia-inspector-download,4.html
2. Click the Wrench Icon to bring up the Profile Settings window.
3. Under Profiles, click the dropdown and select 'Fallout 4'
4. Under Compatibility, change the setting for "SLI compatibility bits (DX1x)" to
"0x080200F5 (Max Payne 3)" by clicking the dropdown next to it.
5. In Nvidia Inspector, scroll down to the SLI section.
6. Here is what you need to change under SLI:
Number of GPUs to use on the SLI rendering mode = SLI_GPU_COUNT_TWO
(You can select FOUR if you have four graphics cards in SLI mode. Select accordingly.)
NVIDIA predefined number of GPUs to use on SLI rendering mode = SLI_PREDEFINED_GPU_COUNT_AUTOSELECT
NVIDIA predefined SLI mode on DirectX 10 = SLI_PREDEFINED_MODE_DX10_FORCE_AFR2
8. Run the game and enjoy the increase number of frames per second!
http://www.guru3d.com/files-get/nvidia-inspector-download,4.html
2. Click the Wrench Icon to bring up the Profile Settings window.
3. Under Profiles, click the dropdown and select 'Fallout 4'
4. Under Compatibility, change the setting for "SLI compatibility bits (DX1x)" to
"0x080200F5 (Max Payne 3)" by clicking the dropdown next to it.
5. In Nvidia Inspector, scroll down to the SLI section.
6. Here is what you need to change under SLI:
Number of GPUs to use on the SLI rendering mode = SLI_GPU_COUNT_TWO
(You can select FOUR if you have four graphics cards in SLI mode. Select accordingly.)
NVIDIA predefined number of GPUs to use on SLI rendering mode = SLI_PREDEFINED_GPU_COUNT_AUTOSELECT
NVIDIA predefined SLI mode on DirectX 10 = SLI_PREDEFINED_MODE_DX10_FORCE_AFR2
8. Run the game and enjoy the increase number of frames per second!
Sorry if repost
I set mine to two cards and not three. 100fps now maxed with 99% usage both cards.