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I've been dealing with a problem where if I don't enable "Above 4G decoding" in the BIOS settings, my server system won't boot up with a certain number of storage devices.
Google results give this: "The definition of “Above 4G decoding” is to allow the user to enable or disable memory mapped I/O for a 64-bit PCIe device to 4GB or greater address space, because the primary VGA card should always be mapped below 4GB address." (https://www.asus.com/support/FAQ/1004170/)
But what does this mean, for someone who doesn't know much about computers?
3It means that the system memory assigned to your VGA card must below the 4 GB address space unless this option is enabled. Depending on the exact specifications of your server, this might not be possible, if the option is disabled. You should leave it enabled based on the fact your system will not boot with it disabled. – Ramhound – 2017-08-09T17:09:06.420
1@Ramhound You should make this an answer, not a comment. Thanks though! – jmoon – 2017-08-09T18:10:26.103