Uso Kubuntu 14.04, Xubuntu 16.04, Slackware 14.1 KDE nesse PC Intel "Atom" abaixo:
creto2@creto2-desktop:~$ inxi -FxZ
System: Host: creto2-desktop Kernel: 4.4.0-45-generic x86_64 (64 bit gcc: 5.4.0)
Desktop: Xfce 4.12.3 (Gtk 2.24.28) Distro: Ubuntu 16.04 xenial
Machine: Mobo: ASRock model: AD525PV3
Bios: American Megatrends v: P1.20 date: 04/01/2011
CPU: Dual core Intel Atom D525 (-HT-MCP-) cache: 512 KB
flags: (lm nx sse sse2 sse3 ssse3) bmips: 7180
clock speeds: max: 1795 MHz 1: 1795 MHz 2: 1795 MHz 3: 1795 MHz
4: 1795 MHz
Graphics: Card: Intel Atom Processor D4xx/D5xx/N4xx/N5xx Integrated Graphics Controller
bus-ID: 00:02.0
Display Server: X.Org 1.18.4 drivers: intel (unloaded: fbdev,vesa)
Resolution: 1280x800@59.81hz
GLX Renderer: Mesa DRI Intel Pineview
GLX Version: 1.4 Mesa 11.2.0 Direct Rendering: Yes
Audio: Card Intel NM10/ICH7 Family High Definition Audio Controller
driver: snd_hda_intel bus-ID: 00:1b.0
Sound: Advanced Linux Sound Architecture v: k4.4.0-45-generic
Network: Card: Qualcomm Atheros AR8151 v2.0 Gigabit Ethernet
driver: atl1c v: 1.0.1.1-NAPI port: ec00 bus-ID: 01:00.0
IF: enp1s0 state: up speed: 100 Mbps duplex: full
mac: bc:5f:f4:37:a1:56
Drives: HDD Total Size: 160.0GB (17.4% used)
ID-1: /dev/sda model: SAMSUNG_HD161GJ size: 160.0GB
Partition: ID-1: / size: 19G used: 5.5G (32%) fs: ext4 dev: /dev/sda6
ID-2: /home size: 88G used: 17G (21%) fs: ext4 dev: /dev/sda8
ID-3: swap-1 size: 4.00GB used: 0.00GB (0%) fs: swap dev: /dev/sda5
RAID: No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors: System Temperatures: cpu: 31.0C mobo: N/A
Fan Speeds (in rpm): cpu: N/A
Info: Processes: 192 Uptime: 11:40 Memory: 731.0/3942.2MB
Init: systemd runlevel: 5 Gcc sys: 5.4.0
Client: Shell (bash 4.3.461) inxi: 2.2.35
creto2@creto2-desktop:~$
E roda bem usável o KDE do Kubuntu que é um dos mais pesados que já vi.
T+