EPOX Pentium 4 Processor based AGP 4X mainboard User Manual download pdf (Page 22)

Installation

Page 3-6

3-3 System Memory Configuration

The mainboard accommodates four PC2100/PC2700/PC3200 184-pin DIMMs (Dual In-

line Memory Modules):

• Supports up to 4.0GB of 266/333/400MHz DDR SDRAM.

• Supports two 64-bit wide DDR data channels.

• Available bandwidth up to 3.2GB/s (DDR400) for single-channel mode and

6.4GB/s (DDR400) in dual-channel mode.

• Registered DIMMs not supported.

• Supports 128-Mb, 256-Mb, 512Mb DDR technologies.

• Supports only x8, x16, DDR devices with four banks.

• SPD (Serial Presence Detect) scheme for DIMM detection support.

• Supports configurations defined in the JEDEC DDR1 DIMM specification

only.

Memory configurations :

• When FSB is 400MHz, DDR266 is supported.

• When FSB is 533MHz, DDR266 and DDR333 are supported.

• When FSB is 800MHz, DDR333 and DDR400 are supported. (With DDR333,

adaptive synchronization aligns to the closest FSB to memory clock ratio, setting the

memory channel to 320MHz).

• The four DIMM sockets are divided into two Dual Channel pairs according to

the color <Figure 7>. Each dual channel pair has the same color, e.g. DIMM1

and DIMM3. <Figure 8> shows the logical memory layout. We recommend

you to use DIMM sockets of the same color to obtain the best memory

performance. It is preferable to use DRAM DIMM of the same type and size.

• Using non-compliant memory with higher bus speeds (overclocking) may

severely compromise the integrity of the system.

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EPOX Pentium 4 Processor based AGP 4X mainboard User Manual Page 22