ASROCK 990FX Extreme4 User Manual page 52

Multiplier/Voltage Change
This item is set to [Auto] by default. If it is set to [Manual], you may adjust
the value of Processor Frequency and Processor Voltage. However, it is
recommended to keep the default value for system stability.
HT Bus Speed
This feature allows you selecting Hyper-Transport bus speed. Confi gura-
tion options: [200MHz] to [2000MHz].
HT Bus Width
This feature allows you selecting Hyper-Transport bus width. Confi guration
options: [8 Bit] and [16 Bit].
DRAM Confi guration
DRAM Frequency
If [Auto] is selected, the motherboard will detect the memory module(s)
inserted and assigns appropriate frequency automatically.
DRAM Timing Control
Power Down Enable
Use this item to enable or disable DDR power down mode.
Bank Interleaving
Interleaving allows memory accesses to be spread out over banks on the
same node, or accross nodes, decreasing access contention.
Channel Interleaving
It allows you to enable Channel Memory Interleaving. Confi guration op-
tions: [Disabled], [Auto]. The default value is [Auto].
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