ASROCK PRO Series User Manual page 63

Z490M Pro4
IOL Init Value
Configure IO latency init value for IO latency training.
RTL (CH A)
Configure round trip latency for channel A.
RTL (CH B)
Configure round trip latency for channel B.
IOL (CH A)
Configure IO latency for channel A.
IOL (CH B)
Configure IO latency for channel B.
IOL Offset (CH A)
Configure IO latency offset for channel A.
IOL Offset (CH B)
Configure IO latency offset for channel B.
RFR Delay (CH A)
Configure RFR Delay for Channel A.
RFR Delay (CH B)
Configure RFR Delay for Channel B.
ODT Setting
ODT WR (A1)
Configure the memory on die termination resistors' WR for channel A1.
ODT WR (A2)
Configure the memory on die termination resistors' WR for channel A2.
ODT WR (B1)
Configure the memory on die termination resistors' WR for channel B1.
ODT WR (B2)
Configure the memory on die termination resistors' WR for channel B2.
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