Chapter 4: BIOS
4-9
DCT Unganged Mode
This setting enables unganged DRAM mode (64-bit). Options are Auto
(ganged mode) and
Always
(unganged mode).
Power Down Enable
This setting enables or disables DDR power down mode. Options are
Enabled
and Disabled.
Power Down Mode
This sets the power down mode. Options are
Channel
and Chip Select.
ECC Confi guration
DRAM ECC Enable
DRAM ECC allows hardware to report and correct memory errors automati-
cally. Options are
Enabled
and Disabled.
DRAM Scrub Redirect
Allows system to correct DRAM ECC errors immediately, even with
background scrubbing on. Options are Enabled and
Disabled
.
4-Bit ECC Mode
Allows the user to enabled 4-bit ECC mode (also known as ECC
Chipkill). Options are Enabled and
Disabled
.
DRAM BG Scrub
Corrects memory errors so later reads are correct. Options are
Dis-
abled
and various times in nanoseconds and microseconds.
Data Cache BG Scrub
Allows L1 cache RAM to be corrected when idle. Options are
Disabled
and
various times in nanoseconds and microseconds.
L2 Cache BG Scrub
Allows L2 cache RAM to be corrected when idle. Options are
Disabled
and
various times in nanoseconds and microseconds.
