| PartNumber | 78.B1GM4.AF20B | 78.B1GMS.4050B | 78.B1GM3.AF50B |
| Description | Memory Modules 4GB ECC DDR4 SDRAM UDIMM | Memory Modules 4GB DDR4 SDRAM UDIMM | Memory Modules 4GB DDR4 2133 |
| Manufacturer | Apacer | Apacer | Apacer |
| Product Category | Memory Modules | Memory Modules | Memory Modules |
| RoHS | Y | - | Y |
| Product | UDIMM, ECC | UDIMM | UDIMM |
| Memory Size | 4 GB | 4 GB | 4 GB |
| Memory Type | DDR4 | 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 | Bulk |
| Brand | Apacer | Apacer | Apacer |
| Minimum Operating Temperature | 0 C | - | - |
| Product Type | Memory Modules | Memory Modules | Memory Modules |
| Factory Pack Quantity | 1 | 1 | 1 |
| Subcategory | Memory & Data Storage | Memory & Data Storage | Memory & Data Storage |