Some Steam Machine units include a single-channel 16GB DDR5 memory module instead of dual-channel 8GB RAM.
During an interview with Digital Foundry, Valve engineers Pierre-Loup Griffais and Yazan Aldehayyat confirmed that some Steam Machine units ship with a single 16GB DDR5 memory module rather than the expected dual-channel 8GB RAM configuration. According to them, the change was driven by supply chain realities rather than engineering preference. Sourcing sufficient quantities of 8GB DDR5 SODIMM modules became increasingly difficult during production, as manufacturers shifted toward higher-capacity memory modules, leaving smaller-capacity sticks in short supply.
As a result, Valve opted to use a single 16GB DDR5-5600 module in some Steam Machine units. In theory, dual-channel memory offers higher throughput by allowing the system to access two memory modules simultaneously. Single-channel configurations can therefore limit performance in workloads that are heavily dependent on memory bandwidth. However, according to Valve, the real-world impact is smaller than benchmarks would suggest.
Ultimately, the extent of the performance difference largely depends on the type of game being played. Titles that are primarily GPU-limited, especially those running at higher resolutions such as 4K, are unlikely to show significant differences between single-channel and dual-channel memory configurations. However, large-scale RPGs, simulation titles, and strategy games such as Baldur’s Gate 3, Dragon’s Dogma 2, Factorio, Cities: Skylines, and Crimson Desert often place greater demand on the CPU and memory, and are likely to benefit from the additional memory bandwidth provided by a dual-channel setup.
Fortunately, Valve appears committed to repairability and user upgrades. Following the approach taken with the Steam Deck, the company plans to provide official teardown and repair documentation while also partnering with iFixit to supply replacement parts and repair guides. This should make it easier for users who wish to alter or upgrade their Steam Machine memory configuration in the future.
