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A minimal RAM inspection tool for Linux. Shows DIMM slot details (model, vendor, frequency), memory usage stats and top consumers — in a clean, btop-style TUI.
Raspberry Pi supported.
Linux only. Requires
/proc,/sys/class/hwmon, anddmidecode.
DIMM Slots
╭──────────┬────────────────────────┬────────────────┬─────────┬──────┬───────────┬───────────┬─────────╮
│ Slot │ Part Number │ Vendor │ Size │ Type │ Max MT/s │ Cfg MT/s │ Voltage │
├──────────┼────────────────────────┼────────────────┼─────────┼──────┼───────────┼───────────┼─────────┤
│ ChannelA │ M471A2G43CB2-CWE │ Samsung │ 16 GB │ DDR4 │ 3200 │ 3200 │ 1.2 V │
│ ChannelB │ M471A2G43CB2-CWE │ Samsung │ 16 GB │ DDR4 │ 3200 │ 3200 │ 1.2 V │
╰──────────┴────────────────────────┴────────────────┴─────────┴──────┴───────────┴───────────┴─────────╯
Memory Usage
╭──────────────────────────────────────────────────────────────────────╮
│ RAM 32 GB installed across 2 DIMM slots 31.3 GB │
├──────────────────────────────────────────────────────────────────────┤
│ Used 18.0 GB █████████████████████░░░░░░░░░░░░░░░ 57% │
│ Available 13.3 GB │
│ Free 1.4 GB │
│ Buffers 1.5 GB │
│ Cached 8.5 GB │
├──────────────────────────────────────────────────────────────────────┤
│ Swap Used 555 MB █░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ 3% │
│ Swap Total 16.0 GB │
╰──────────────────────────────────────────────────────────────────────╯
Top Memory Consumers
╭────────────────────────────────────────────────────────────────────────────────╮
│ # PID Process RSS Share │
├────────────────────────────────────────────────────────────────────────────────┤
│ 1. 9703 phpstorm 5.7 GB ████░░░░░░░░░░░░░░░░░░░░ 18% │
│ 2. 9907 copilot-languag 883 MB █░░░░░░░░░░░░░░░░░░░░░░░ 2% │
│ 3. 10702 chrome 821 MB █░░░░░░░░░░░░░░░░░░░░░░░ 2% │
╰────────────────────────────────────────────────────────────────────────────────╯
Upgrade Potential
╭────────────────────────────────────────────────────────╮
│ Slots 2 used / 4 total ●●○○ │
│ Installed 32 GB │
│ Maximum 64 GB │
│ Headroom 32 GB available │
│ Max Freq 3200 MT/s │
╰────────────────────────────────────────────────────────╯
Motherboard
╭──────────────────────────────────────────────────────────────────────╮
│ Manufacturer Gigabyte Technology Co., Ltd. │
│ Product Z390 GAMING SLI-CF │
╰──────────────────────────────────────────────────────────────────────╯
Or in RaspberryPi
Board Memory
╭────────────────────────────────────────────────────────╮
│ Raspberry Pi 5 Model B Rev 1.1 │
├────────────────────────────────────────────────────────┤
│ Type LPDDR4X (soldered, no slots) │
│ Frequency 4267 MT/s (default) │
│ Voltage 0.6000V │
╰────────────────────────────────────────────────────────╯
Memory Usage
╭──────────────────────────────────────────────────────────────────────╮
│ RAM 15.8 GB │
├──────────────────────────────────────────────────────────────────────┤
│ Used 2.3 GB █████░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ 14% │
│ Available 13.5 GB │
│ Free 536 MB │
│ Buffers 1.2 GB │
│ Cached 11.8 GB │
├──────────────────────────────────────────────────────────────────────┤
│ Swap Used 244 MB █████████████████░░░░░░░░░░░░░░░░░░░ 47% │
│ Swap Total 511 MB │
╰──────────────────────────────────────────────────────────────────────╯
Top Memory Consumers
╭─────────────────────────────────────────────────────────────────────────────────╮
│ # PID Process RSS Share│
├─────────────────────────────────────────────────────────────────────────────────┤
│ 1. 2928 jellyfin 528 MB █░░░░░░░░░░░░░░░░░░░░░░░ 3% │
│ 2. 868 node 171 MB ░░░░░░░░░░░░░░░░░░░░░░░░ 1% │
│ 3. 892 MainThread 156 MB ░░░░░░░░░░░░░░░░░░░░░░░░ 0% │
│ 4. 973599 pcmanfm 149 MB ░░░░░░░░░░░░░░░░░░░░░░░░ 0% │
│ 5. 1147 syncthing 108 MB ░░░░░░░░░░░░░░░░░░░░░░░░ 0% │
│ 6. 2008011 mariadbd 105 MB ░░░░░░░░░░░░░░░░░░░░░░░░ 0% │
│ 7. 1020 labwc 104 MB ░░░░░░░░░░░░░░░░░░░░░░░░ 0% │
│ 8. 1453483 cps 98 MB ░░░░░░░░░░░░░░░░░░░░░░░░ 0% │
│ 9. 899 wayvnc 98 MB ░░░░░░░░░░░░░░░░░░░░░░░░ 0% │
│ 10. 865 node 79 MB ░░░░░░░░░░░░░░░░░░░░░░░░ 0% │
╰─────────────────────────────────────────────────────────────────────────────────╯
Temperature support depends on hardware. The RAM Temperatures section is shown automatically when sensors are available and silently skipped when they are not.
| Hardware | Support |
|---|---|
| DDR5 | ✅ via spd5118 kernel driver |
| DDR4 | ❌ no sensor chip on the DIMM itself |
On DDR4 systems the section will never appear — this is expected, not a bug.
cargo install raminfoThat's it. The binary lands in ~/.cargo/bin/ which is already in your $PATH if Rust is set up normally.
Download the binary for your architecture from the Releases page.
| File | Target |
|---|---|
raminfo-x86_64-linux |
64-bit Linux (most desktops / servers) |
raminfo-aarch64-linux |
64-bit ARM — modern distros (Raspberry Pi 4/5 on Ubuntu 22.04+, AWS Graviton) |
raminfo-aarch64-linux-static |
64-bit ARM — older distros (Raspberry Pi 4/5 on Raspberry Pi OS Bullseye/Bookworm) |
raminfo-armv7-linux |
32-bit ARM — modern distros (Raspberry Pi 2/3 on Ubuntu 22.04+) |
raminfo-armv7-linux-static |
32-bit ARM — older distros (Raspberry Pi 2/3 on Raspberry Pi OS Bullseye/Bookworm) |
# example for x86_64
curl -L https://github.com/swayoleg/raminfo/releases/latest/download/raminfo-x86_64-linux \
-o raminfo
chmod +x raminfo
sudo mv raminfo /usr/local/bin/git clone https://github.com/swayoleg/raminfo
cd raminfo
cargo build --release
sudo cp target/release/raminfo /usr/local/bin/Cross-compiling for ARM (from an x86 machine):
# install targets
rustup target add aarch64-unknown-linux-gnu
rustup target add aarch64-unknown-linux-musl
rustup target add armv7-unknown-linux-gnueabihf
rustup target add armv7-unknown-linux-musleabihf
# install cross-linkers (Ubuntu/Debian)
sudo apt install musl-tools gcc-aarch64-linux-gnu gcc-arm-linux-gnueabihf
# build gnu (modern distros)
cargo build --release --target aarch64-unknown-linux-gnu
cargo build --release --target armv7-unknown-linux-gnueabihf
# build musl/static (older distros, Raspberry Pi OS)
cargo build --release --target aarch64-unknown-linux-musl
cargo build --release --target armv7-unknown-linux-musleabihfAlso add to .cargo/config.toml:
[target.aarch64-unknown-linux-gnu]
linker = "aarch64-linux-gnu-gcc"
[target.armv7-unknown-linux-gnueabihf]
linker = "arm-linux-gnueabihf-gcc"
[target.aarch64-unknown-linux-musl]
linker = "aarch64-linux-gnu-gcc"
rustflags = ["-C", "target-feature=+crt-static"]
[target.armv7-unknown-linux-musleabihf]
linker = "arm-linux-gnueabihf-gcc"
rustflags = ["-C", "target-feature=+crt-static"]Binaries will be in target/<target-triple>/release/raminfo.
DIMM slot details require dmidecode:
# Debian / Ubuntu
sudo apt install dmidecode
# Arch
sudo pacman -S dmidecode
# Fedora
sudo dnf install dmidecodeFor passwordless sudo, add to /etc/sudoers:
your_user ALL=(ALL) NOPASSWD: /usr/sbin/dmidecode
sudo raminfo # full output including DIMM hardware details
raminfo # memory stats and top consumers (no sudo needed)DIMM slot info requires sudo to call dmidecode. For passwordless use, add to /etc/sudoers:
your_user ALL=(ALL) NOPASSWD: /usr/sbin/dmidecode
cargo test # run all tests
cargo test --test format_tests # formatting helpers only
cargo test --test parsing_tests # parser logic onlyTests live in the tests/ directory and cover formatting utilities (format.rs) and all parsing logic (parsers.rs) using mock system data. The src/lib.rs file exists solely to expose modules to these integration tests.
- Cover with tests
-
--monitor— live refresh mode -
--interval <seconds>— refresh rate for monitor mode (default: 2s) -
--monitor --json— newline-delimited JSON stream (ndjson) -
--json— single-shot JSON output for scripting and piping tojq - Windows support via WMI (
Win32_PhysicalMemory,Win32_OperatingSystem) - Refactor into lib + binary — expose core parsing as a reusable library crate
colored— terminal colorsdmidecode— system package, required for DIMM slot details, will ignore dim slots if not installed