title = “64GB RAM is the sweet spot for three Windows VMs” type = “.report.” source_topic = “Home Lab Hardware”

Yes, if each VM gets 8‑16GB and you want room to breathe.

Three Windows VMs will eat RAM fast. Windows 10/11 idles around 2‑4GB, but once you start actually running things, 8GB per VM is the minimum for a usable experience. 12‑16GB is comfortable. Do the math: 3 × 12 = 36GB just for the VMs. Add the host OS overhead (another 4‑8GB), and you’re north of 40GB before you even open anything.

That’s why 32GB feels like a tight squeeze. You can make it work if you’re thrifty – maybe running lightweight VMs or not using them all at once – but you’ll constantly be watching memory pressure and swapping. For a home lab where you want to experiment without babysitting RAM, 64GB is where the frustration ends.

Also worth noting: you’re not just buying RAM for today. If you ever want to spin up a fourth VM, add Docker, or run a heavier workload, 64GB keeps the door open. Future you will thank you.

Don’t cheap out. This is where the extra