HP Probook 645 G4 RAM upgrade specifications
HP ProBook 645 G4 laptop RAM upgrade specifications include two SO-DIMM slots supporting DDR4-SDRAM memory modules operating at 2400 MHz frequency. Maximum RAM capacity reaches 32 GB total when both memory slots are populated with compatible modules. The specifications detail available upgrade options and memory configuration parameters for the HP ProBook 600 series model 645 G4.
Memory Upgrade Specifications
| Specification | Value |
|---|---|
| Memory slots | 2x SO-DIMM |
| Form factor | SO-DIMM |
| Memory type | DDR4-SDRAM |
| Frequency | 2400 MHz |
| Maximum RAM | 32 GB |
| Voltage | 1.2V |
| Number of pins | 260-pin |
| Interface | PC4 |
| PC Speed Rating | PC4-2400 (PC4-19200) |
| Bandwidth | 19.2 GB/s |
| Laptop Release date | 22 August 2018 |
Additional Notes
- Dual channel architecture requires matching memory modules in both slots to optimize memory bandwidth and integrated graphics performance.
- The presence of 2 physical slots on the HP Probook 645 G4 allows for a complete replacement of factory memory to reach the architectural limit without being restricted by soldered components.
- Installing memory modules with speeds higher than 2400 MHz results in automatic downclocking to the system bus limit due to chipset firmware restrictions.
- Using a single memory module instead of a pair creates a data bottleneck by forcing the system into single channel mode.
- Internal motherboard access is required for installation as the chassis lacks a dedicated external memory service hatch.
- Maximum capacity is reached by utilizing 2 16 GB modules because the hardware logic does not support 32 GB high density single sticks.
- Compatibility is restricted to non ECC unbuffered modules to ensure successful POST sequences.