Salidas de vídeo desde placa madre y desde tarjeta gráfica

[Pasote]

Bueno me pongo a mirar lo que es hacer SLI.

De momento con la placa Z170-K según el manual si se pueden conectar y coexistir salidas placa madre y tarjeta gráfica. Que funcione como bien dices puede ser harina de otro costal....

Te pongo extracto del manual :

2.6.3 System Agent (SA) Configuration
VT-d [Enabled]
Allows you to enable or disable VT-d function on MCH. Configuration options: [Enabled]
[Disabled]
Graphics Configuration
Allows you to select a primary display from CPU, PCIE and PCI graphical devices.
Primary Display [Auto]
Allows you to select the primary display from CPU, PCIE and PCI graphics devices.
Configuration options: [Auto] [CPU Graphics] [PCIE] [PCI]
iGPU Multi-Monitor [Disabled]
This item allows you to empower both integrated and discrete graphics devices for the
multi-monitor output. The CPU graphics shared system memory size is fixed at 64 MB.
Configuration options: [Disabled] [Enabled]
RC6(Render Standby) [Enabled]
Allows you to enable or disable render standby support. Configuration options:
[Disabled] [Enabled]
DMI/OPI Configuration
This item allows you to control various DMI (direct media interface) to run at PCI-E 2.0 speed.
DMI Max Link Speed [Gen2]
Allows you to configure the DMI speed. Configuration options: [Auto] [Gen1] [Gen2]
[Gen3]

PEG Port Configuration
Allows you to configure the PEG Port settings.
PCIEx16_1 Link Speed [Auto]
Allows you to configure the PCIEx16 speed for slot 1. Configuration options: [Auto]
[Gen1] [Gen2] [Gen3]
Memory Configuration
Allows you to configure the memory configuration parameters.
Memory Remap [Enabled]
Set this item to [Enabled] to support DRAM address remapping

Y especialmente no entiendo este párrafo en relación a los 64 MB

iGPU Multi-Monitor [Disabled]
This item allows you to empower both integrated and discrete graphics devices for the
multi-monitor output. The CPU graphics shared system memory size is fixed at 64 MB.
Configuration options: [Disabled] [Enabled]