The official flavour of Ubuntu using KDE. The default desktop environment is KDE Plasma Desktop.
Xenial Xerus (16.04)
- 1 GHz processor
- 512 MB of system memory (RAM)
- 5 GB of free disk space
- VGA capable of 1024x768 screen resolution
Bionic Beaver (18.04)
- 8 GB of free disk space
- other requirements are similar to earlier releases
The minimum requirements were last mentioned in Kubuntu 8.04 news announcement, then merely copied from Ubuntu 12.04 release note and has since deprecated, and not found at elsewhere. The minimum requirements for newer release is unofficial and subject to testing on real hardware or in a virtual machine. Kubuntu has varying requirements on VM.
Xenial Xerus (16.04) on VM: Requires at least 1 GB RAM, 10 GB fixed-size Virtual Disk Image, 128 MB video memory. Selecting "Try Kubuntu" or "Install Kubuntu" does not matter. Live session will takes time to load; If virtual machine has stopped responding, do reset and start again. Installation may take longer time. User will see "low disk space warning" during installation but will succeed.
Bionic Beaver (18.04) on VM: Requires VT-x/AMD-V hardware acceleration, otherwise will not proceed further than boot menu. Other requirements need further clarification.
- 1 GHz dual core processor or better
- 2 GB of system memory (RAM)
- 10 GB of free disk space (the more hard disk capacity, the better)
- VGA capable of 1024x768 screen resolution. If desktop effects are desired, a supported GPU is required.
The recommended requirement is based on this article with poorly cited source on Wikipedia and partially copied from Ubuntu 16.04. The amount of system memory and free disk space are found similarly in the release note of KDE Neon User Edition 5.6.
There is no official system requirements for Kubuntu being documented to this revised date. Related discussions are found in this 2014 thread and this 2016 thread on Kubuntu Forums.