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Hypertherm SuperMicro 370SBA 533Mhz User Manual

Page 61

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Chapter 5: Running Setup

5-9

Memory Autosizing Support

The dynamic detection and sizing of SDRAM and EDO is performed by the

BIOS in a system populated with memory which has no SPD information.

When set to

Enable

, memory does not have the SPD information. The

settings for this option are

Auto

or

Enable

.

DRAM Integrity Mode

This option is

grayed out

for the Celeron processor, but is available for the

Pentium II processor.

DRAM Refresh Rate

This option specifies the interval between Refresh signals to DRAM system

memory. The settings for this option are

15.6 us

(micro-seconds),

31.2 us

,

62.4 us

,

124.8 us

or

249.6 us

.

Memory Hole

This option specifies the location of an area of memory that cannot be

addressed on the ISA bus. The settings are

Disabled

,

15 MB

-

16 MB

, or

512 KB

-

640 KB

.

SDRAM CAS# Latency

This option regulates the column address strobe. The settings are 2

SCLKs, 3 SCLKs or

Auto

.

SDRAM RAS# to CAS# Delay

This option specifies the length of the delay inserted between the RAS and

CAS signals of the DRAM system memory access cycle if SDRAM is

installed. The settings are

Auto

(AMIBIOS automatically determines the

optimal delay),

2 SCLKs

or

3 SCLKs

.

Note: The Optimal default setting

is Auto and the Fail-Safe default setting is 3 SCLKs

.

SDRAM RAS# Precharge

This option specifies the length of the RAS precharge part of the DRAM

system memory access cycle when Synchronous DRAM system memory is

installed in the computer. The settings are

Auto

(AMIBIOS automatically

determines the optimal delay),

2 SCLKs or 3 SCLKs

.

Note: The Optimal

default setting is Auto and the Fail-Safe default setting is 3 SCLKs.

Power Down SDRAM

BX supports SDRAM power down mode to minimize SDRAM power usage.

The settings for this option are

Enabled

or

Disabled

. The

Enabled

setting

enables the SDRAM Power Down feature.