I have a Poweredge T320 used mainly as NFS file server and Plex. all 8 HDD bays are full. Main storage is 4x4TB WD Red in Raid5.

However electricity prices are surging and its too power hungry to be running 24/7. I bought a replacement Optiplex 5070 with a i5-7600 cpu that I plan to supply with a couple of Exos 20TB drives, abandoning the Raid config.

As I was waiting for it to arrive, a Dell T20 (G3220 cpu) came up for sale close by for $20. I ended up buying that one as well.

Now I have to choose which one to set up as a server. I do not transcode or do any other CPU intensive tasks, so my main concern is low power use. Which one do you guys suggest I pick?