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Technical Manual
ePanel-C3
Version 1.04
North Bridge Configuration
Configure SDRAM Timing by SPD
Disabled deactivates the reading of data from the Serial Presence Detect (SPD) EEPROM of the RAM module
(Default). Most notably low-cost modules often have faulty parameters, so a safe start-up is assured with the
default setting. If a branded module is installed this option should be set to Enabled.
SDRAM Frequency
The memory controller only supports PC1600 and PC2100 DDR SDRAM modules. This results in the two
frequencies 200 (PC1600) and 266 MHz (PC2100).
SDRAM CAS# Latency
SDRAM Bank Interleave
SDRAM Command Rate
Auto Precharge for TLB/WB
SDRAM Integrity Mode
This option should only be changed by experts, since an incorrect setting can quickly lead to a start-up error. It
is only possible to reset this error by deleting the NVRAM.
AGP Mode
The Default setting is 4x. Under normal circumstances, it is not necessary to reset this to 2x or 1x.
AGP Aperture Size
Aperture size expands the existing graphics memory. This feature is only used if there is no space left in the
actual graphics memory (e.g. when using textures). The rule of thumb is: Aperture size should be at least one
quarter and at most one half of the main memory.
AGP Fast Write
This option activates fast data transfer (Enabled), i.e. the route through the system memory is avoided. If there
are problems, the option should be reset to the setting Disabled (Default).
AGP Read Synchronization
When Enabled, the Northbridge waits until the write procedure in the system memory is completed before a
new access to the AGP Bus Master takes place (Default). Setting this to Disabled increases performance but
can cause problems.
Page 48 of 71 Pages
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