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Intel
®
E7505 Chipset MCH Datasheet 167
Functional Description
5.5.3 DRAM Technologies and Types Supported
• 128-Mb, 256-Mb, 512-Mb, and 1-Gb technology DRAMs
• x4, x8 registered
• x8, x16 unbuffered (Double-sided x16 is not supported)
• 4 bank devices only
• Page sizes supported: 4 KB, 8 KB, 16 KB, 32 KB, and 64 KB. They are selectable per row pair.
5.5.4 Memory Capacity
The maximum memory capacity supported by the MCH is 16 GB–64 MB (see note below). This
can be achieved with the following configurations:
Note: Due to 8-bit register constraints, the maximum usable memory address decode is 15.94 GB
(16 GB–64 MB).
NOTES:
1. “Double row” implies that single or double row DIMMs are supported. “Single row” implies that only single row
DIMMs are supported.
2. Loads listed above are “maximums.”
3. “Loading” does not include the MCH load.
4. The supported configuration limits are based on electricals. Logically the MCH supports three double-sided
DIMMs per channel in all configurations
Note: Contact your Intel representative to verify the memory configurations validated with the MCH.
Table 5-9 shows memory per DIMM at each DRAM density:
5.5.5 Refresh
The MCH contains a multi-level refresh operation to reduce the refresh performance impact.
Refresh events are queued and performed opportunistically, when the DRAM pipe is idle. Standard
Auto Refresh operation is performed in a staggered manner for only populated pairs of rows. Self-
refresh operation is supported as part of transition into or out of Suspend-To-RAM (STR).
Table 5-8. Maximum Supported Memory Configurations
DIMM Type Frequency
Number of DIMMs
per Channel
Address/CMD
Loading
CS
Loading
CKE
Loading
Data
Loading
Unbuffered 100 and 133 2 DIMMs double row 36 loads 8 8 4 Loads
Registered 100 and 133 3 DIMM double row 3 loads 1 3 6 loads
Table 5-9. Memory per DIMM at Each DRAM Density
Parts 128 Mb 256 Mb 512 Mb 1 Gb Comments
x16, single row 64 MB 128 MB 256 MB 512 MB
Available in unbuffered only.
NOTE: Double-sided x16 is not supported
x8, single row 128 MB 256 MB 512 MB 1 GB Unbuffered and registered
x8, double row 256 MB 512 MB 1 GB 2 GB Unbuffered and registered
x4, single row 256 MB 512 MB 1 GB 2 GB Available in registered only
x4, double row 512 MB 1 GB 2 GB 4 GB Available in registered only (stacked chips)