Max Async Latency

Common Options : 0 to 15 ns

Quick Review

This is an AMD Athlon 64 / Opteron processor-specific BIOS feature. It controls the amount of asynchronous latency, which depends on the time it takes for data to travel from the processor to the furthest DIMM on the motherboard and back. For your reference, AMD has a few conservative suggestions on setting this BIOS feature.

Do note that in this case, the distance of the furthest DIMM slot is considered analogous to the number of DIMM slots. The greater number of DIMM slots available on the motherboard, the further the final slot is from the memory controller.

Also, these values are rough and conservative recommendations that assume that the furthest DIMM slot is occupied by a module. If your motherboard has four slots and you choose to populate only the first two slots, you could use a shorter asynchronous latency.

Generally, it is recommended that you stick with the asynchronous latency recommended by AMD (see table above) or your memory module's manufacturer. You can, of course, adjust the amount of asynchronous latency according to the situation. For example, if you are overclocking the memory modules, or if you populate the first two slots of the four available DIMM slots; you can get away with a lower asynchronous latency.

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