Intel System Board G4H875-B - Manual (Page 77)

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BIOS Setup
DRAM Data Integrity Mode
The ECC (Error Checking and Correction) function is supported only
in x72 (72-bit) PC SDRAM DIMMs. If you are using x64 (64-bit) PC
SDRAM DIMMs, set this field to Non-ECC.
Non-ECC Uses x64 PC SDRAM DIMM.
ECC This option allows the system to recover from memory
failure. It detects single-bit and multiple-bit errors, then
automatically corrects single-bit error.