Did you set the Mode in the Bios to Legacy Mode and Enable CSM?
You have 44 PCIe Lanes with that CPU
so this is not going to be an issue.
Do you see the two cards in the Bios?
If so what are they showing they are running at?
Maybe Forcing them in the Bios to GEN2 https://www.nvidia.com/Download/driverResults.aspx/112594/en-us
May or may not help.
With some games and applications, you may experience little to no performance gain or even a performance drop with 4-way SLI or multi-GPU configurations.
1 Open the NVIDIA Control Panel, then click Manage 3D Settings from the navigation pane.
2 Click the Global Settings tab, then scroll to the Power management mode feature, click the corresponding list arrow and select Prefer maximum performance, then click Apply
Changing the Primary Display Across SLI GPUs Takes Longer than Expected
On an SLI system, switching the primary (or SLI focus) display when each display in the SLI group is connected to a different GPU takes longer than expected.
On an SLI system with each SLI GPU driving a display, the display connected to the slave GPU is the primary display (also the SLI focus display).
In order to switch the primary display to the one connected to the other GPU, the master and slave GPU configuration must also switch.
In order to reassign which GPU is the master and which is the slave, the driver must be reloaded.
It the process of reloading the driver that takes the additional time.
post edited by bcavnaugh - 2019/05/05 22:14:04