Chassis Plans ATXP-875P, Техническое описание

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ATXP-875P Technical Reference Chapter 3: Upgrading
Chassis Plans 39
Chapter 3 Upgrading
Upgrading the Microprocessor
The latest revision of the ATXP-875P currently supports full series of Intel Pentium 4 (mPGA478 400MHz,
533MHz and 800MHz PSB) processors featuring Intel Hyper-Threading technology. Please, check the
manufacturer’s web site for details and revisions regarding CPU speed.
Since the ATXP-875P features CPU auto-sensing device there is no jumper to be set when changing the CPU.
Upgrading the System Memory
The ATXP-875P allows an upgrade of the system memory with up to 4GB SDRAM DDR DIMM modules in four
memory slots with the following features:
System Memory Features:
•
2.6 V (only) 184-pin DDR SDRAM DIMMs with gold-plated contacts.
•
Unbuffered, single-sided or double-sided DIMMs with the following restriction:
- Double-sided DIMMs with x16 organization are not supported.
•
Maximum total system memory: 4 GB; minimum total system memory: 64 MB .
•
DDR266 MHz (PC2100), DDR333 MHz (PC2700) and DDR400 MHz (PC3200) DDR SDRAM DIMMs
only.
•
Serial Presence Detect (SPD).
•
ECC and non-ECC DIMMs supported.
Supported System Bus Frequency and Memory Speed Combinations
To use this type of DIMM… The processor’s system bus frequency must be…
DDR400 800 MHz
DDR333 800 or 533 MHz (Note)
DDR266 800, 533 or 400 MHz
Note : When using an 800 MHz system bus frequency processor, DDR333 memory is clocked at 320 MHz. This
minimizes system latencies to optimize system throughput.