5 Things to Know About RAM for Unreal Engine Compilation

32GB is the practical minimum for Unreal Engine builds With 16GB, you will hit swap constantly during a full rebuild, causing compile times to stretch out as the system thrashes. 32GB keeps those memory spikes in RAM, and the build finishes faster.

Unreal’s build system is a memory hog UBT and UHT consume large amounts of RAM during compilation. Extra memory prevents the system from slowing down due to excessive paging.

Visual Studio compilation benefits less but still gains Visual Studio is more CPU-bound, but large solutions still benefit from extra RAM for caching and parallel builds, especially with IncrediBuild or FastBuild.

64GB makes sense if you keep the editor open while compiling If you run the Unreal Editor and compile simultaneously, 64GB prevents performance bottlenecks. For most daily builds, 32GB is sufficient.

Do not skimp on RAM if you build UE5 daily Saving money on RAM will cost you time and frustration. 32GB is the floor for a tolerable workflow.