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| PartNumber | 78.B1GM4.AF20B | 78.B1GM3.AF50B | 78.B1GM4.AF00B |
| Description | Memory Modules 4GB ECC DDR4 SDRAM UDIMM | Memory Modules 4GB DDR4 2133 | Memory Modules DIMM / SO-DIMM / SIMM 4GB ECC DDR4 SDRAM UDIMM |
| Manufacturer | Apacer | Apacer | - |
| Product Category | Memory Modules | Memory Modules | - |
| RoHS | Y | Y | - |
| Product | UDIMM, ECC | UDIMM | - |
| Memory Size | 4 GB | 4 GB | - |
| Memory Type | DDR4 | DDR4 | - |
| Speed | 2133 MT/s | - | - |
| Operating Supply Voltage | 1.14 V to 1.26 V | - | - |
| Maximum Operating Temperature | + 85 C | - | - |
| Number of Pins | 288 Pin | - | - |
| Dimensions | 133.35 mm x 31.25 mm x 3.9 mm | - | - |
| Packaging | Bulk | Bulk | - |
| Brand | Apacer | Apacer | - |
| Minimum Operating Temperature | 0 C | - | - |
| Product Type | Memory Modules | Memory Modules | - |
| Factory Pack Quantity | 1 | 1 | - |
| Subcategory | Memory & Data Storage | Memory & Data Storage | - |