Editing HPE ProLiant DL20 (section)

== Use Cases ==
Use cases range from light workloads up to reasonably heavy workloads.  Runs ESXi 6 and 6.5 with no trouble.  2 together form a quiet yet powerful lab environment and the 2 x 1Gbs and 2 PCIe slots are not so much of a restriction in a lab environment.  Melanox ConnectX 10Gbs cards are easily available on eBay and also on the vSphere HCL, and 1 in each host with a crossover gives plenty of room for multiple VLANs and very fast vMotion!  In addition, a Starttech single or dual USB 3.0 to 1Gbs adapter works really well and can be secured to the top of the server with velcro.  This gives 4 x 1Gbs ports.  

As a VMware Advantage account holder I run the full-fat vSphere Enterprise Plus 6 on mine without any issues, booting off a small USB 3.0 32GB internally-mounted drive.  Just upgraded the VCSA to 6.5 and its getting to be a nice system.  TBH I'd like to add a thrid server but 2 is fine for now.  64GB in each would be nice now.  My lab has a 3TB WD Red mirrored pair for storage sat in my old Synology 2-bay NAS.

The spinning LED caddies are a matter of personal opinion.  They can get on your nerves after a while.