PC 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 & 11Outdated 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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchTo enable zram on a systemd-based Linux distribution, first check whether your distribution already configures it, then use systemd-zram-generator or your distro’s supported method. To confirm it is active, run zramctl and swapon --show. A zram swap device stores compressed pages in RAM; its reported capacity is not additional physical memory.
What zram does—and what its size means
zram is a Linux kernel compressed-RAM block device. When configured as swap, pages moved to it are compressed and kept in memory. This can reduce memory pressure for some workloads, at the cost of CPU work; results depend on the workload, how compressible its data is, available memory, CPU, kernel, and configuration. It does not guarantee a particular compression ratio or performance improvement.
The device’s logical size is not extra physical RAM. Its capacity describes the block device, while the actual memory occupied by compressed pages is a separate measure. For kernel details and manual setup guidance, see the Linux kernel zram documentation.
Check whether your distribution already manages zram
Before installing a manager or creating a device, inspect your distribution’s current setup. Some distributions enable zram or provide their own configuration. Avoid running a second zram manager against a device already managed by a distro service.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
#1 Best Overall
- Includes Raspberry Pi 5 with 2.4Ghz 64-bit quad-core CPU (8GB RAM)
- Includes 128GB Micro SD Card pre-loaded with 64-bit Raspberry Pi OS, USB MicroSD Card Reader
- CanaKit Turbine Black Case for the Raspberry Pi 5
- CanaKit Low Noise Bearing System Fan
- Mega Heat Sink - Black Anodized
Package names, defaults, and configuration precedence vary. As specific examples—not a complete package guide—the systemd-zram-generator project README says Debian 12 Bookworm or later provides the package in its official repositories and documents installation for Arch. Consult your distribution’s current documentation and the systemd-zram-generator project README for the method that fits your system.
Enable zram with systemd-zram-generator
On a systemd distribution where this generator is supported and not superseded by distro-specific management, it creates zram devices and generated systemd units from configuration. Its configuration manual documents per-device sections and settings such as device size, compression algorithm, swap priority, host-memory limit, and optional writeback device. Check the installed manual because project behavior and distribution integration can change.
1. Install the generator using your distribution’s instructions
Use the package or installation method documented for your distribution. Do not assume that package names, defaults, or repository availability are identical across Linux systems.
Rank #2
- Includes Raspberry Pi 4 4GB Model B with 1.5GHz 64-bit quad-core CPU (4GB RAM)
- Includes Pre-Loaded 32GB EVO+ Micro SD Card (Class 10), USB MicroSD Card Reader
- CanaKit Premium High-Gloss Raspberry Pi 4 Case with Integrated Fan Mount, CanaKit Low Noise Bearing System Fan
- CanaKit 3.5A USB-C Raspberry Pi 4 Power Supply (US Plug) with Noise Filter, Set of Heat Sinks, Display Cable - 6 foot (Supports up to 4K60p)
- CanaKit USB-C PiSwitch (On/Off Power Switch for Raspberry Pi 4)
2. Add a device configuration
A minimal project-documented example is:
# /etc/systemd/zram-generator.conf
[zram0]
zram-size = ram / 2This is an example, not a universal recommended size. The project documentation also describes a default size expression when a configuration section exists, but distribution-provided settings may differ. Select a size appropriate to your system and check your distro’s configuration before overriding it. See the zram-generator configuration manual for supported expressions and options.
3. Check the compression algorithm available on this machine
Do not copy an algorithm name from another guide without checking the running kernel. Inspect the available choices with:
cat /sys/block/zram0/comp_algorithmThe available list depends on kernel support. If the generator is configured to use an unsupported algorithm, its documentation says setup continues with a warning; check the service logs and resulting device rather than assuming the requested algorithm took effect.
Rank #3
- 【What you Get】You will get 1*Pi 5 8GB Single Board,1*RasTech Case,1*Active Cooler,1*Screwdriver,1*Installation instructions,12-month free warranty, lifetime service, 24-hour prompt and friendly response.
- 【More Connectors】There are two USB 3.0 ports(5Gbps simultaneously) and two USB 2.0 ports, which triple total bandwidth ,support any combination of up to two cameras or displays. Peak SD card performance is doubled through support for the SDR104 high-speed mode. It provides a smooth desktop experience for you. Offer Gigabit Ethernet and a PCIe interface, along with dual-band Wi-Fi and Bluetooth 5.0/BLE wireless capability. The RasTech Pi 5 Kit use the new 27W 5.1V 5A USB-C power connector.
- 【 Support Dual 4Kp60 Display 】Each of the two microHDMI sockets can control a 4K display at 60 Hertz, now support HDR, offering super HD video for media streaming projects. RPi 5 is the first RPi model that comes with a PCI Express port (PCIe 2.0 x1 with 500 MB/s) to attach SSDs (requires separate M.2 HAT).
- 【 Excellent Chips And Applications】Pi 5 is a full-size Pi computer using silicon built in-house at Pi. The RP1 “southbridge” provides the bulk of the I/O capabilities for Pi 5. Pi 5 is more friendly and convenient in the development of Internet of Things, Web development, machine identification, automatic control and other electronic equipment applications and network.
- 【 Faster CPU, Better GPU 】 Pi 5 features a Broadcom BCM2712 64-bit quad-core Arm Cortex-A76 processor running at 2.4GHz, it delivers a 2–3× increase in CPU performance relative to RaspberryPi 4. The 800MHz VideoCore VII GPU is compatible to OpenGL ES 3.1 and Vulkan 1.2, substantial uplift in graphics performance. Pi 5 Offers lightning-fast CPU speed, a PCI Express interface, a Real Time Clock (RTC) and a power button and runs significantly cooler than Pi 4.
4. Apply the configuration
The generator runs early during boot, so rebooting is the straightforward way to apply a new configuration. The project README also recommends reloading systemd and starting the generated device unit:
sudo systemctl daemon-reload
sudo systemctl start dev-zram0.deviceGenerated unit names and behavior can depend on the installed version and system. Check the unit on your machine and follow the installed project manual; the generator’s README documents the setup workflow.
Alternative: configure zram manually
The kernel documents direct configuration through sysfs, and zramctl provides a higher-level utility interface. This can suit systems without the generator, but accepted options and exact steps depend on the running kernel and util-linux version. Follow the kernel documentation and the local zramctl --help or man page.
Rank #4
- All-in-One Complete Kit: This SANOOV RPi 5 bundle comes with Raspberry Pi 5 4GB RAM single board, active cooler, durable ABS case and screwdriver. No extra parts needed, ready to use right out of the box for beginners and hobbyists
- Powerful Single Board Computer: Equipped with 4GB RAM and high-performance processor, delivers fast running speed for 4K playback, AI projects, programming and daily computing tasks. SANOOV for raspberry pi 5 4GB is equipped with broadcom 64 quad-core Arm Cortex A76 processor with gigabit ethernet and upgraded with IEEE 802.11ac Wi-Fi, Bluetooth 5.0 dual-band 2.4Ghz and 5Ghz and Power Over Ethernet (POE). Upgrading delivers 2-3 x speed vs Pi 4, redefining the experience
- Efficient Active Cooler: Effectively lowers operating temperature and prevents performance throttling. Runs quietly even under long-time heavy load, ensures stable operation all day long. SANOOV RPi 5 4GB kit offer an active cooler, which combines an aluminium heatsink with a high-performance PWM fan. Active cooler is fully compatible with the Pi OS, which can effectively reduce the temperature of RPi5 and ensure its good performance during long-term high load operation
- Sturdy ABS Protective Case: Well-fitted for Raspberry Pi 5 board, can be secured with 4 screws to effectively protect the Pi 5 motherboard from damage, reserves full access to all ports and buttons. SANOOV uses ABS material to produce the case, which has a softer texture and feel. Meanwhile, SANOOV case adopts a layered design for easy disassembly and installation. (Tip: The Case cannot install M.2 HAT Add on Board and Solid State Drive!)
- Wide Application & Full Compatibility: Seamlessly compatible with official OS and mainstream peripheral accessories for Raspberry Pi 5. Whether you are a beginner, student, electronics hobbyist or professional developer, this all-in-one kit meets your diverse needs. It excels in IoT projects, robotics design, retro gaming devices, home media servers and other DIY creations. Backed by a large global community, you can easily find guides, technical support and shared projects online
Do not combine manual setup with a generator or distribution service managing the same device. Choose one lifecycle manager so that configuration, activation, and device recreation do not conflict.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Confirm zram exists and is being used
Run both checks:
zramctl
swapon --showzramctl reports zram device characteristics and utilization counters; its columns can vary with util-linux version. swapon --show lists active swap devices, so it confirms whether a zram device is activated as swap. The generator README recommends these utilities for checking setup.
A configured device or nonzero capacity alone does not prove swap pages are currently stored there. Look for a zram device in swapon --show to confirm it is active, then compare its counters over time if you want to see whether usage changes.
Quick wins for a faster PC:
Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Repair Windows errors before they cause bigger problemsFix Now →Best Value
- Not including the Raspberry Pi 5 (8GB), the Crowpi advanced version comes with the Raspberry Pi 5
- ELECROW Black Case for the Raspberry Pi 5, CrowPi is equipped with a 9-inch HD touchscreen along with a camera; All the regular components used in DIY electronics are packed into the CrowPi development board, such as LCD, LED matrix, buzzer, light sensor, PIR sensor, ultrasonic sensor, IR sensor, etc
- Raspberry Pi Sensors: The Crowpi raspberry pi 5 programming kit is jam-packed with lots of buttons such as 19 different sensors in a tidy easy to use package; You don't have to wait and wire things
- Build Quality: Solid ABS shell and well made components in one place make it strong and convenient to travel
- Programming Lessons: This raspberry pi 5 learning kit ships with step by step instructions and provides 21 lessons to take you through identifying components reading code and running it in the terminal
Interpret the counters carefully
Depending on the tool version, output may expose values such as data size, compressed data size, memory used, and compression algorithm. These describe different things: the logical device capacity is not the amount of physical memory consumed, and compressed-data measures are not interchangeable with memory-used measures. For kernel-exposed attributes and their meanings, consult the documentation for your running kernel under /sys/block/zram0/.
A changing usage counter indicates activity over the interval you observe. There is no universal target utilization or optimal compression ratio established by the documentation; judge the readings in the context of your workload and memory pressure.
Change or disable a generator-managed device safely
Recreating a device can affect active swap: pages may need to move from compressed swap into other memory. If zram backs a temporary filesystem rather than swap, unmounting or resetting it loses that filesystem’s contents. Understand what the device currently holds before restarting or stopping its setup service.
Apply a configuration change
Rebooting is the simplest documented way to apply generator configuration changes. A runtime restart of systemd-zram-setup@zramN.service recreates the device; use the actual instance name and instructions applicable to your system. If generated unit structure changes, reload systemd with systemctl daemon-reload. When removing a device, stop its unit before reloading.
The Tool Desk
Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Disable zram
For generator-managed zram, remove or override the relevant local configuration according to your distribution’s configuration precedence, then stop or deactivate the generated device cleanly. Confirm the result with swapon --show. There is no safe universal deletion command: another manager or vendor-supplied configuration may still enable zram.
Choosing between the generator and manual setup
| Consideration | systemd-zram-generator | Manual setup |
|---|---|---|
| Distribution support | Depends on the distribution’s package and systemd integration; check its documentation. | Depends on kernel and utility support; follow local documentation. |
| Device lifecycle | Managed through generated systemd units and generator configuration. | Managed through the commands or service you configure; avoid overlap with another manager. |
| Persistence across boots | Configuration is stored in the generator configuration and processed during boot. | Requires a persistent mechanism appropriate to the distribution; the kernel’s manual setup steps alone do not establish distro-specific persistence. |
| Verification | zramctl and swapon --show. |
zramctl and swapon --show. |
These are operational differences, not evidence that either approach delivers better compression or performance. Use the route supported by your distribution and keep one manager responsible for the device.
Quick Recap
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.
