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| PartNumber | MT18HTF51272AZ-80EC1 | MT18HTF51272PDZ-80EC1 | MT18HTF51272AZ-667C1 |
| Description | MODULE DDR2 SDRAM 4GB 240UDIMM | DRAM Module DDR2 SDRAM 4Gbyte 240RDIMM Tray | MODULE DDR2 SDRAM 4GB 240UDIMM |
| Manufacturer | Micron Technology Inc. | - | Micron Technology Inc. |
| Product Category | Memory - Modules | - | Memory - Modules |
| Series | - | - | - |
| Package Case | 240-UDIMM | - | 240-UDIMM |
| Memory Size | 4GB | - | 4GB |
| Memory Type | DDR2 SDRAM | - | DDR2 SDRAM |
| Speed | 800MT/s | - | 667MT/s |