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System Memory Features
The Desktop Board D845PEMY has two DIMM sockets and is designed to support up to 2 GB of single-channel DDR SDRAM memory. The board supports the following memory features:
- 2.5 V (only) 184-pin DDR SDRAM DIMMs with gold-plated contacts
- Unbuffered single-sided or double-sided DIMMs
- Maximum total system memory: 2 GB; minimum total system memory: 64 MB
- DDR333/266/200 MHz SDRAM DIMMs only
- Serial Presence Detect (SPD)
- Suspend to RAM
CAUTION:
Do not use ECC DIMMs with this board. Using ECC DIMMs could damage the board.
Integrator's Notes:
- Registered DIMMs are not supported.
- Double-sided x16 DIMMs are not supported.
- If a full-length PCI add-in card is installed in PCI bus connector 1 (the PCI bus connector closest to the processor), remove the add-in card before installing or upgrading memory to avoid interference with the memory retention mechanism.
Note:
To be fully compliant with all applicable DDR SDRAM memory specifications, the board should be populated with DIMMs that support the Serial Presence Detect (SPD) data structure. This allows the BIOS to read the SPD data and program the chipset to accurately configure memory settings for optimum performance.
Supported system bus frequency and memory speed combinations
| If the processor's system bus frequency is. . . |
You can use this type of DIMM. . . |
| 533 MHz |
DDR333 or DDR266 |
| 400 MHz |
DDR266 or DDR200 | |
Supported DIMM configurations
| DIMM Capacity |
Configuration(Note) |
DDR SDRAM Density |
DDR SDRAM Organization Front-side/Back-side |
Number of DDR SDRAM Devices |
| 64 MB |
SS |
64 Mbit |
8 M x 8/empty |
8 |
| 64 MB |
SS |
128 Mbit |
8 M x 16/empty |
4 |
| 128 MB |
DS |
64 Mbit |
8 M x 8/8 M x 8 |
16 |
| 128 MB |
SS |
128 Mbit |
16 M x 8/empty |
8 |
| 128 MB |
SS |
256 Mbit |
16 M x 16/empty |
4 |
| 256 MB |
DS |
128 Mbit |
16 M x 8/16 M x 8 |
16 |
| 256 MB |
SS |
256 Mbit |
32 M x 8/empty |
8 |
| 256 MB |
SS |
512 Mbit |
32 M x 16/empty |
4 |
| 512 MB |
DS |
256 Mbit |
32 M x 8/32 M x 8 |
16 |
| 512 MB |
SS |
512 Mbit |
64 M x 8/empty |
8 |
| 1024 MB |
DS |
512 Mbit |
64 M x 8/64 M x 8 |
16 | | Note:
In this column, “DS“ refers to double-sided memory modules (containing DDR SDRAM devices on both sides) and “SS“ refers to single-sided memory modules (containing DDR SDRAM devices on only one side).
Updated: August 23, 2004
This applies to:
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