How Much Power Does Memory Use?

The answer can vary depending on different circumstances, for example system type, applications, and the type of specific memory installed. For these reasons we do not advertise specific power usage for any of our memory. As a rule of thumb, however, you want to estimate high when determining power supply needs (5 watts per module for standard consumer memory) to prevent instability during heavier workloads, as well as account for aging host systems supplying less power as components wear, leading to malfunctions. High-performance memory such as Ballistix® parts can draw more power, especially if you overclock the voltage beyond XMP settings. Registered (RDIMM) parts with more DRAM components draw additional power as well. Load-reduced memory (LRDIMMs) in a server can use a little less power compared to comparable RDIMMs, because those parts work with a lower data load to allow higher capacities and lower power needs.

If you are building your own computer, and you want to know how large of a power supply you should purchase, it is a good idea to use one of the free “power supply calculators” you can find online or consult your motherboard and/or system manufacturer for guidance.