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Contents
Vendor Tested Memory
The table below lists parts which passed either BASIC or FULL
testing conducted by Intel for the Intel® Desktop Board VC820. Parts
tested by third-party RIMM vendors can be found under the list of
"RIMM Vendors - Web Sites" section above. For a complete explanation
of FULL and BASIC testing see the Desktop
Board Component Functional Testing Levels page.
PC600 RIMMs
| Manufacturer* |
Size (MB) |
Test Level |
Manufacturer Part Number |
Number of Devices |
ECC or non-ECC |
| Infineon |
128 MB |
FULL |
HYR186420G-653 |
8 |
ECC |
| NEC |
64 MB |
FULL |
MC-4R64CEE6C-653 |
4 |
Non-ECC |
| NEC |
128 MB |
FULL |
MC-4R128CEE6C-653 |
8 |
Non-ECC |
| NEC |
256 MB |
FULL |
MC-4R256CEE6C-845 |
16 |
Non-ECC |
| Samsung |
64 MB |
FULL |
KMMR18R84AC1-RG6* |
4 |
ECC |
| Samsung |
64 MB |
FULL |
MR18R0824AG1-CG600 |
4 |
ECC |
| Samsung |
96 MB |
FULL |
KMMR18R86AC1-RG6* |
6 |
ECC |
| Samsung |
96 MB |
FULL |
MR18R0826AG1-CG600 |
6 |
ECC |
| Samsung |
128 MB |
FULL |
KMMR18R88AC1-RG6* |
8 |
ECC |
| Samsung |
128 MB |
FULL |
MR18R0828AG1-CG600 |
8 |
ECC |
| Samsung |
192 MB |
FULL |
KMMR18R8CAC1-RG6* |
12 |
ECC |
| Samsung |
192 MB |
FULL |
MR18R082CAG1-CG600 |
12 |
ECC |
| Samsung |
256 MB |
FULL |
KMMR18R8GAC1-RG6* |
16 |
ECC |
| Samsung |
256 MB |
FULL |
MR18R082GAG1-CG600 |
16 |
ECC |
| Samsung |
64 MB |
FULL |
KMMR16R84AC1-RG6* |
4 |
Non-ECC |
| Samsung |
96 MB |
FULL |
KMMR16R86AC1-RG6* |
6 |
Non-ECC |
| Samsung |
128 MB |
FULL |
KMMR16R88AC1-RG6* |
8 |
Non-ECC |
| Samsung |
192 MB |
FULL |
KMMR16R8CAC1-RG6* |
12 |
Non-ECC |
| Samsung |
256 MB |
FULL |
KMMR16R8GAC1-RG6* |
16 |
Non-ECC |
|
PC700 RIMMs
| Manufacturer* |
Size (MB) |
Test Level |
Manufacturer Part Number |
Number of Devices |
ECC or non-ECC |
| Infineon |
128 MB |
FULL |
HYR186420G-745 |
8 |
ECC |
| Kingston |
64 MB |
BASIC |
KVR700x18-4/64 |
4 |
ECC |
| NEC |
64 MB |
FULL |
MC-4R64CEE6C-745 |
4 |
Non-ECC |
| NEC |
128 MB |
FULL |
MC-4R128CEE6C-745 |
8 |
Non-ECC |
| NEC |
256 MB |
FULL |
MC-4R256CEE6C-745 |
16 |
Non-ECC |
| Samsung |
64 MB |
FULL |
KMMR18R84AC1-RK7* |
4 |
ECC |
| Samsung |
96 MB |
FULL |
KMMR18R86AC1-RK7* |
4 |
ECC |
| Samsung |
128 MB |
FULL |
KMMR18R88AC1-RK7* |
4 |
ECC |
| Samsung |
64 MB |
FULL |
KMMR16R84AC1-RK7* |
4 |
Non-ECC |
| Samsung |
64 MB |
FULL |
MR16R0824AG1-CK700 |
4 |
Non-ECC |
| Samsung |
96 MB |
FULL |
KMMR16R86AC1-RK7* |
6 |
Non-ECC |
| Samsung |
96 MB |
FULL |
MR16R0826AG1-CK700 |
6 |
Non-ECC |
| Samsung |
128 MB |
FULL |
KMMR16R88AC1-RK7* |
8 |
Non-ECC |
| Samsung |
128 MB |
FULL |
MR16R0828AG1-CK700 |
8 |
Non-ECC |
| Samsung |
192 MB |
FULL |
KMMR16R8CAC1-RK7* |
12 |
Non-ECC |
| Samsung |
192 MB |
FULL |
MR16R082CAG1-CK700 |
12 |
Non-ECC |
| Samsung |
256 MB |
FULL |
KMMR16R8GAC1-RK7* |
16 |
Non-ECC |
| Samsung |
256 MB |
FULL |
MR16R082GAG1-CK700 |
16 |
Non-ECC |
| Samsung |
192 MB |
FULL |
KMMR18R8CAC1-RK7* |
12 |
ECC |
| Samsung |
192 MB |
FULL |
MR18R082CAG1-CK700 |
12 |
ECC |
| Samsung |
256 MB |
FULL |
KMMR18R8GAC1-RK7* |
16 |
ECC |
| Samsung |
256 MB |
FULL |
MR18R082GAG1-CK700 |
16 |
ECC |
| Smart Modular |
64 MB |
BASIC |
SMH072RFSAH01 |
4 |
ECC |
| Smart Modular |
96 MB |
BASIC |
SMH108RFSAH01 |
6 |
ECC |
| Smart Modular |
128 MB |
BASIC |
SMH144RFSAH01 |
8 |
ECC |
|
PC800 RIMMs
| Manufacturer* |
Size (MB) |
Test Level |
Manufacturer Part Number |
Number of Devices |
ECC or non-ECC |
| Infineon |
128 MB |
FULL |
HYR186420G-845 |
8 |
ECC |
| Kingston |
64 MB |
BASIC |
KVR800x18-4/64 |
4 |
ECC |
| Kingston |
128 MB |
BASIC |
KVR800x18-8/128 |
8 |
ECC |
| Kingston |
256 MB |
BASIC |
KVR800X18-16/256 |
16 |
ECC |
| NEC |
64 MB |
FULL |
MC-4R64CEE6C-845 |
4 |
Non-ECC |
| NEC |
128 MB |
FULL |
MC-4R128CEE6C-845 |
8 |
Non-ECC |
| NEC |
256 MB |
FULL |
MC-4R256CEE6C-845 |
16 |
Non-ECC |
| Samsung |
64 MB |
FULL |
KMMR18R84AC1-RK8* |
4 |
ECC |
| Samsung |
64 MB |
FULL |
MR18R0824AG1-CK800 |
4 |
ECC |
| Samsung |
64 MB |
FULL |
KMMR16R84AC1-RK8* |
4 |
Non-ECC |
| Samsung |
96 MB |
FULL |
KMMR18R86AC1-RK8* |
6 |
ECC |
| Samsung |
96 MB |
FULL |
MR18R0826AG1-CK800 |
6 |
ECC |
| Samsung |
96 MB |
FULL |
KMMR16R86AC1-RK8* |
6 |
Non-ECC |
| Samsung |
128 MB |
FULL |
KMMR18R88AC1-RK8* |
8 |
ECC |
| Samsung |
128 MB |
FULL |
MR18R0828AG1-CK800 |
8 |
ECC |
| Samsung |
128 MB |
FULL |
MR16R0828AG1-CK800 |
8 |
Non-ECC |
| Samsung |
128 MB |
FULL |
KMMR16R88AC1-RK8* |
8 |
Non-ECC |
| Samsung |
192 MB |
FULL |
KMMR18R8CAC1-RK8* |
12 |
ECC |
| Samsung |
192 MB |
FULL |
MR18R082CAG1-CK800 |
12 |
ECC |
| Samsung |
192 MB |
FULL |
KMMR16R8CAC1-RK8* |
12 |
Non-ECC |
| Samsung |
192 MB |
FULL |
MR16R082CAG1-CK800 |
12 |
Non-ECC |
| Samsung |
256 MB |
FULL |
KMMR18R8GAC1-RK8* |
16 |
ECC |
| Samsung |
256 MB |
FULL |
MR18R082GAG1-CK800 |
16 |
ECC |
| Samsung |
256 MB |
FULL |
KMMR16R8GAC1-RK8* |
16 |
Non-ECC |
| Smart Modular |
64 MB |
BASIC |
SMH072RFS0D02 |
4 |
ECC |
| Smart Modular |
128 MB |
BASIC |
SMH144RFS0D01 |
8 |
ECC |
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* These Samsung part numbers are obsolete.
Definitions of Testing Levels
System Memory Combinations
The desktop board uses Rambus* RDRAM RIMM* technology.
The desktop board supports the following memory features:
- Up to two 2.5 V, 168-pin RIMM modules
- Single- or double-sided RIMM module configurations
- Serial Presence Detect (SPD) memory only
- Non-ECC with 16-bit components (128 Mbit technology)
- ECC with 18-bit components (144 Mbit technology)
- 512 MB maximum onboard capacity using 128/144 Mbit technology
Caution. The board supports combinations of no more
than 32 RDRAM components across all installed RIMM modules. If the
total number of RDRAM components installed in RIMM connectors exceeds
32, the computer will not boot.
All RIMM connectors must be populated to achieve continuity for
termination at the Rambus interface. Continuity RIMMs ( or "pass-through"
modules) must be installed in any unused RIMM connectors.
The following table gives examples of RDRAM component-count for supported
RIMM modules. Component counts can be identified on the RIMM label.
Typical RIMM Module Configurations
| Rambus Technology |
128/144 Mbit |
| 4 RDRAM components per RIMM |
64 MB |
| 6 RDRAM components per RIMM |
96 MB |
| 8 RDRAM components per RIMM |
128 MB |
| 12 RDRAM components per RIMM |
192 MB |
| 16 RDRAM components per RIMM |
256 MB |
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Note. To obtain the best memory bus loading characteristics,
RIMM modules should be installed in Bank 0 first and then in Bank
1 (bank 0 is closest to the processor). A continuity RIMM module must
be installed in Bank 1 if unused.
The BIOS automatically selects the memory bus frequency from the Serial
Presence Detect (SPD) information in the RIMM module. The Intel Desktop
Board VC820 platform supports only Serial Presence Detect (SPD) memory.
Serial Presence Detect (SPD) information is required to properly configure
the Rambus interface. The BIOS configures the Rambus interface to
the speed of the slowest RIMM module installed.
The following table describes the memory frequencies supported with
standard configurations of the Intel Desktop Board VC820.
Memory Bus Frequency with DRCG (Rambus Clock Generator)
| |
PC600 |
PC700 |
PC800 |
| Host Bus 100 MHz |
300 MHz |
See footnote* |
400 MHz |
| Host Bus 133 MHz |
266 MHz |
356 MHz |
400 MHz |
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* The BIOS configures the Rambus interface to a memory bus frequency
of 300 MHz for PC700 memory when configured with a host bus speed
of 100 MHz. This is equivalent to PC600 performance.
ECC memory detects multiple-bit errors and corrects single-bit
errors. When ECC memory is installed, the BIOS will support both
ECC and non-ECC mode. The BIOS automatically detects if ECC memory
is installed and provides the Setup option for selecting ECC mode.
ECC mode must be enabled in the Setup program; the default setting
is disabled. If any non-ECC memory is installed, ECC operation is
not available.
The following table describes the effect of using Setup to put each
memory type in each supported mode.
Memory Error Detection Mode Established in Setup Program
| Memory Type |
ECC Disabled |
ECC Enabled |
| Non-ECC RIMM |
No error detection |
N/A |
| ECC RIMM |
No error detection |
Single-bit error correction, multiple-bit error detection |
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Note. Whenever ECC mode is selected in Setup, some performance
loss may occur.
This applies to:
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