Chapter 5: UEFI BIOS (EPYC 7003)
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Data Bits EMS
Use this feature to set the data transmission size for Console Redirection. The options are
7 Bits and
8 Bits
.
Parity EMS
A parity bit can be sent along with regular data bits to detect data transmission errors.
Select Even if the parity bit is set to 0, and the number of 1's in data bits is even. Select
Odd if the parity bit is set to 0, and the number of 1's in data bits is odd. Select None if you
do not want to send a parity bit with your data bits in transmission. Select Mark to add a
mark as a parity bit to be sent along with the data bits. Select Space to add a Space as a
parity bit to be sent with your data bits. The options are
None
, Even, Odd, Mark and Space.
Stop Bits EMS
A stop bit indicates the end of a serial data packet. Select 1 Stop Bit for standard serial
data communication. Select 2 Stop Bits if slower devices are used. The options are
1
and 2.
CPU Configuration
SMT Control
Use this setting to specify Simultaneous Multithreading. The options are Disabled and
Auto
.
Core Performance Boost
This setting is used to configure for Core Performance Boost. Options include Disabled and
Auto
.
Global C-state Control
This setting is used to configure for Global C-state Control. Options include Disabled, Enabled,
and
Auto
.
Local APIC Mode
This setting is used for Local APIC Mode. The options include xAPIC, x2APIC, and
Auto
.
CCD Control
This setting sets the number of CCDs to be used. The options include
Auto,
2 CCDs, 3
CCDs, 4 CCDs, and 6 CCDs.
Core Control
This sets the number of cores to be used by your system. Once this option has been used to
remove any cores, a power cycle is required in order for the future selections to take effect.
Options include
Auto
, TWO (1+1), Four (2 + 2), Four (4+0), and Six (3 + 3). If unsure, leave
this to Auto.
