I have the server core OS installed with network and raid controller drivers installed. What other drivers are necessary? With GUI, you typically install chipset, vga, audio (if supported), sata controller, etc...
closed as not a real question by MadHatter, TheCleaner, mdpc, John Gardeniers, Jeff Ferland Nov 20 '12 at 20:10
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There's really no reason not to install all available drivers, especially chipset. Not having a point-and-click GUI doesn't mean you should leave your system in a partially-installed state.