Gigabyte R263-Z30-AAH1 User Manual page 115

Rack server - amd epyc 9004 - 2u up 12-bay nvme/sata/sas, (aac1/aac2/platinum redundant power supplies), (aah1/aah2/ titanium redundant power supplies)
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Parameter
Processor ODT impedance
Dram DQ drive strengths
Description
Select the ODT impedance for all DBYTE IOs.
Options available: Auto, High Impedance, 480 ohm, 240 ohm, 160 ohm,
120 ohm, 96 ohm, 80 ohm, 68.6 ohm, 60 ohm, 53.3 ohm,48 ohm, 43.6 ohm,
40 ohm, 36.9 ohm, 34.3 ohm, 32 ohm, 30 ohm, 28.2 ohm, 26.7 ohm,
25.3 ohm. Default setting is Auto.
Select the Dram Pull-up and Pull-Down Output Driver Impedance for all DQ
and DMI IOs..
Options available: Auto, 48 ohm, 40 ohm, 34 ohm, Default setting is Auto.
BIOS Setup
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