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DRAM Parity Checking
When enabled, turns on parity checking for the system RAM. This should be enabled if you are using parity checking (or ECC), and disabled otherwise. The default is normally "Disabled" since (unfortunately) most modern systems don't use parity memory. I recommend the use of parity memory; see here for details on what parity memory is, and see here for a discussion of the merits of parity memory versus non-parity memory.
Warning: If you turn on
parity checking on a system that does not have parity memory in it, the system will halt
with a parity error as soon as it tries to boot up. If you turn off parity checking
on a system that does have parity memory, the system will run just fine, but you will have
no parity checking protection active.
Next: DRAM Parity / ECC Mode