LENOVO ThinkPad X240 RAM upgrade specifications
The Lenovo ThinkPad X240 supports DDR3L-SDRAM memory upgrades through two SO-DIMM slots. Maximum RAM capacity reaches 8 GB total. Compatible memory operates at 1600 MHz frequency. Upgrade specifications indicate SO-DIMM form factor modules are required for compatibility with this X-series model. Current and expanded configurations utilize DDR3L-SDRAM technology across available memory slots.
Memory Upgrade Specifications
| Specification | Value |
|---|---|
| Memory slots | 2x SO-DIMM |
| Form factor | SO-DIMM |
| Memory type | DDR3L-SDRAM |
| Frequency | 1600 MHz |
| Maximum RAM | 8 GB |
| Voltage | 1.35V (Low Voltage) |
| Number of pins | 204-pin |
| Interface | PC3L |
| PC Speed Rating | PC3L-1600 (PC3L-12800) |
| Bandwidth | 12.8 GB/s |
| Laptop Release date | 13 January 2018 |
Additional Notes
- The presence of 2 physical slots combined with a capped threshold of 8 GB restricts the hardware to 4 GB modules per channel for symmetrical performance.
- Operating on the DDR3L standard indicates a low voltage requirement of 1.35 V which is mandatory for motherboard stability and prevents thermal damage associated with older 1.5 V modules.
- Memory bandwidth is limited to single channel throughput if only 1 slot is populated in the LENOVO ThinkPad X240 regardless of the total capacity installed.
- The chipset lacks support for high density 8 GB or 16 GB single sticks forcing a hardware recognized limit that cannot be bypassed via software or BIOS updates.
- Installing modules with frequencies higher than 1600 MHz results in automatic downclocking to match the integrated memory controller cycles.
- Physical access to the SO-DIMM slots requires the removal of the external battery and the entire base chassis cover which may involve plastic clips prone to fatigue.
- The architecture relies on non ECC unbuffered memory meaning server grade modules or registered RAM will cause a failure to boot.