Short answer: There is no proven universal winner across current Linux distributions. In a controlled Fedora 31 comparison published in 2019, LXDE used the least memory, followed by LXQt and Xfce. Those results are a historical snapshot of one setup—not a current ranking for every Linux PC. If RAM is tight, compare those environments on your own distribution using the same measurement method and the applications you actually use.
What the available comparisons found
The most directly comparable figures come from Troy Dawson’s Fedora Magazine test, published December 4, 2019. He ran Fedora 31 Live images in separate KVM virtual machines, each with one CPU and 4 GB of RAM. The default desktops were left in place, three terminal windows were opened, and memory was recorded after five minutes.
| Desktop | Reported used memory |
|---|---|
| LXDE | 318 MB |
| LXQt | 391 MB |
| Xfce | 448 MB |
| MATE | 465 MB |
| GNOME | 612 MB |
| Cinnamon | 624 MB |
| KDE | 733 MB |
These are the reported readings for that Fedora 31 virtual-machine setup, not guarantees for other releases or configurations. Services and desktop defaults affect the result; Dawson cautioned that changing the included services or features changes memory use. Read the Fedora Magazine test and its setup.
An older Phoronix test, published in 2010, found LXDE using about 30 MB less RAM than Xfce. It ran Ubuntu 10.04-era development software on a Samsung NC10 netbook with 2 GB of RAM, comparing LXDE 0.5, GNOME 2.29.91, KDE SC 4.4.1, and Xfce 4.6.1. Phoronix noted that Ubuntu package defaults differed, so the comparison was not perfectly controlled. It is useful as historical context, not as evidence about today’s desktops. See the Phoronix test.
The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
How to choose a low-memory desktop
If a machine has limited RAM, LXDE, LXQt, and Xfce are sensible environments to compare first. The Fedora test put LXDE lowest, but it does not establish that LXDE will be the lightest choice on your distribution, with your settings and applications.
- Start with the desktop your distribution supports well. Its default services, settings, and included applications can change the total more than the desktop name alone suggests.
- Try a live session or separate test install. Use the same machine and distribution where possible, and keep the session type, extensions, services, and startup programs consistent.
- Judge responsiveness under your actual workload. A browser with many tabs, mail, documents, and background tasks can matter more than the desktop’s idle footprint.
- Balance memory use with usability. A small idle reading is not the only consideration; choose a desktop that has the features and workflow you need.
How to measure RAM fairly
A memory figure is only meaningful when you know what the tool counted. Linux reports can treat cache and buffers differently: a displayed “used” total may include cached data, while another figure excludes it. Choose one metric and use it for every desktop rather than comparing unlike totals. Numix explains this accounting issue and recommends holding hardware and session conditions steady. Read Numix’s measurement guidance.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
- Keep the test conditions alike. Use the same hardware allocation, distribution release, session type, display settings, and background services as far as practical.
- Start each session the same way. Log in, open the same applications, and allow startup activity to settle before taking a reading. Dawson’s Fedora test used a five-minute wait.
- Record the metric and workload. Note the tool and value you report, whether cache is included, what applications are open, and when the reading was taken.
- Compare idle and working sessions. Idle use helps compare background overhead; a realistic workload shows whether the difference matters during normal use.
GNOME System Monitor’s Resources tab reports the computer’s RAM use, and GNOME notes that automatically started background processes are normal. It is a monitoring aid, not an independent benchmark of desktop environments. See GNOME’s System Monitor help.
Do not confuse disk space with RAM
Debian’s Bookworm task-size figures describe installed disk space, not memory used while a desktop is running. For example, Debian lists Xfce at 2509 MB and KDE Plasma at 4584 MB of task installation size. Those values cannot tell you which desktop uses less RAM. See Debian’s Bookworm task disk-space table.
Outdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchPC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
What can be concluded today
The cited comparisons do not establish a current, cross-distribution winner. The Fedora results are from 2019, the Phoronix comparison is from 2010, and the newer Numix material offers measurement guidance rather than a measured ranking. Treat LXDE, LXQt, and Xfce as candidates to test—not as a guaranteed ordering—and base the decision on consistent measurements with your normal applications.
Quick Recap
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
