Can this video graphics card support dual monitors, and if so, what types of ports are available for connecting them?

Yes, this video graphics card can support dual monitors. It has 1 HDMI port and 1 DisplayPort available for connecting them.

What are the power requirements for the MSI GeForce GT 1030, and does it require an external power connector?

The power consumption for the MSI GeForce GT 1030 is 30W, and the recommended PSU is 300W.

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MSI GeForce GT 1030 DirectX 12 GT 1030 2GH LP OC 2GB 64-Bit GDDR5 PCI Express 3.0 x16 (uses x4) HDCP Ready Low Profile Video Graphics Card