ASROCK X299 User Manual page 84

tWWDD
Use this item to change tWWDD setting. The default is [Auto]
Fourth Timing
RTL (A1)
Configure the round trip latency for channel A1.
RTL (A2)
Configure the round trip latency for channel A2.
RTL (B1)
Configure the round trip latency for channel B1.
RTL (B2)
Configure the round trip latency for channel B2.
RTL (C1)
Configure the round trip latency for channel C1.
RTL (C2)
Configure the round trip latency for channel C2.
RTL (D1)
Configure the round trip latency for channel D1.
RTL (D2)
Configure the round trip latency for channel D2.
IOL (A1)
Configure the IO latency for channel A1.
IOL (A2)
Configure the IO latency for channel A2.
IOL (B1)
Configure the IO latency for channel B1.
IOL (B2)
Configure the IO latency for channel B2.
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