I've been running Unraid 7.2.2 since I installed it about a year ago on my T440 server.
I'm preparing to add a second CPU and additional RAM to the T440 to allow me to use the PCIe x16 slot for a GbE NIC. I want to upgrade the OS while I'm at it.

I've been watching the announcements and OS 7.3.3-rc.1 is still the latest, and 7.4 is still in beta.

Is there anything I should keep in mind when adding a second CPU to a T440.
Just shut everything down, disconnect power, add the CPU and RAM, and power it back up?

Upgrade to 7.3.3-rc.1 beforehand? Wait for 7.4? or does it even matter?


Edit -----------------
I did more research and learned that Unraid is running two parallel stable branches right now

7.2.8 (latest, 2026-07-29)
7.3.2 (2026-07-08, "recommended for all users"
7.3.3-rc.1 (2026-09-03) literally the least-baked build

So based on that information, and my desire for a low risk path, I'm favoring 7.3.2.

Again, any implications for me imminent move to dual CPU? Also anything w.r.t changes in the boot flash?

Edited September 19Sep 19 by timg11

14 hours ago, timg11 said:

Just shut everything down, disconnect power, add the CPU and RAM, and power it back up?

That should be it.