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I moved my 8GB home server from TrueNAS to Debian with Cockpit and, in my own before-and-after measurement, saw 2.5GB more RAM available. That is a result from my server and workload—not a guaranteed saving for other systems. The meaningful comparison is what each system leaves available while doing the same jobs, not simply how much memory its dashboard reports as used.
What the 2.5GB figure means—and what it doesn’t
The 2.5GB figure is my reported result; the cited documentation does not independently verify it. To make it useful, I would compare both systems under the same workload and at the same point in that workload, recording the measurement method and whether it counts filesystem cache. “Used,” “free,” and “available” memory are not interchangeable: Linux can use otherwise idle RAM for cache, which may be reclaimed when applications need it.
So the practical claim is limited: on my server, after this migration, my chosen measurement showed 2.5GB more headroom. It does not establish that Debian or Cockpit saves that amount on every 8GB machine, or that the difference represents memory previously wasted by TrueNAS.
Why an 8GB TrueNAS system can still be a reasonable starting point
TrueNAS’s current hardware guide says, “You should have at least 8 GB of RAM for basic TrueNAS operations with up to eight drives.” The guide’s 8GB figure is a minimum suggestion for that basic use case, not a promise that every workload will run comfortably at that capacity. It also explains that RAM is shared among services, apps, virtual machines, and read caching. Needs rise with workload and configuration. TrueNAS Hardware Guide
#1 Best Overall
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- The current guide calls for 1GB per drive beyond eight for many use cases.
- For the iSCSI workloads it discusses, it recommends 16GB for good performance and 32GB or more for optimal performance.
- Apps, virtual machines, directory services, deduplication, L2ARC, additional clients, and other services can change the memory picture.
The older TrueNAS 25.04 hardware guide lists 8GB and two identically sized devices for a single storage pool in its minimum hardware table. That is edition-specific guidance, not a statement that any 8GB configuration will suit every pool or workload. TrueNAS 25.04 Hardware Guide
What Debian and Cockpit changed in my setup
Debian is the operating system; Cockpit is a web-based administration interface for Linux servers. Cockpit exposes management for areas such as storage, networking, logs, services, accounts, performance, virtual machines, and containers. It uses existing system APIs and normal user logins. The project also says Cockpit uses systemd socket activation and does not run in the background when unused. Cockpit Project
Rank #2
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- 【8GB DDR4 RAM & 256GB NVMe SSD Storage】 Installed with high-speed 8GB DDR4 dual-channel memory and a fast 256GB M.2 2280 SSD, eliminating slow boot times and application loading delays. To accommodate growing data requirements, the upgradeable hardware design features dual SODIMM slots that allow you to expand memory up to 64GB RAM, ensuring smooth operation during heavy multitasking.
- 【High-Capacity Dual M.2 SSD Storage Expansion】 Never worry about running out of space for your business files. In addition to the pre-installed 256GB system drive, the motherboard houses an extra empty internal M.2 2280 NVMe PCIe 3.0 slot. This allows you to easily add a second solid-state drive for up to an additional 2TB of storage capacity (upgrades not included) without needing to remove or reinstall the original operating system.
- 【Radeon 6-Core Graphics & Triple 4K Displays】 Integrated with official AMD Radeon Graphics (6 Graphics Cores, 1500 MHz frequency) for casual gaming, photo editing, and crisp 4K media decoding. Featuring 1x HDMI 2.0 port, 1x DisplayPort, and 1x Full-Function Type-C port, the E5 outputs true 4K@60Hz resolution to three monitors at once. This multi-screen setup eliminates constant window-switching for traders, programmers, and office workers.
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That makes Cockpit a way to manage parts of a Linux server, not a drop-in replacement for every TrueNAS feature or workflow. The result depends on the actual services and storage tools installed and configured on Debian. Cockpit alone does not decide how disks are pooled, how shares are exported, or how snapshots and backups work.
Storage is a separate migration decision
Changing the operating system and management interface does not tell you whether the storage design changed. Before treating another server as comparable, identify whether it retained ZFS, moved to another filesystem, or adopted a different pool and share setup. Then document how data is shared, snapshotted, backed up, and recovered.
Rank #3
- 【Responsive Quad-Core Productivity】 Powered by the AMD Ryzen 3 5300U processor (4 Cores/8 Threads, up to 3.8GHz), the BOSGAME E5 delivers stable and efficient processing for your daily workflows. It is perfectly optimized to run standard business software, manage large spreadsheets, and handle online classes smoothly. Please note: This budget-friendly PC excels at daily office productivity and network server applications, but is not designed for demanding professional 3D rendering or intensive 3A gaming.
- 【Expandable Memory & Dual NVMe Storage】 Equipped with 8GB DDR4 memory and a 256GB M.2 2280 SATA out of the box, ensuring quick boot times and fluid application loading. Designed for future flexibility, the system features dual SODIMM slots supporting memory upgrades up to 64GB, along with an additional empty M.2 2280 NVMe PCIe 3.0 slot for seamless dual-drive expansion without removing your original system drive.
- 【Dual 2.5G LAN & Pro-Level Networking】 Featuring two ultra-fast 2.5GbE RJ45 LAN ports (Realtek RTL8125) and built-in Wi-Fi 5, this micro computer is a powerhouse for advanced network environments. It serves as the perfect hardware foundation for IT enthusiasts and professionals looking to build a secure home server, deploy a pfSense/OPNsense firewall appliance, configure a high-speed NAS, or run stable virtual machines.
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If you keep ZFS, account for its memory behavior rather than treating all RAM used by it as unavailable overhead. The Debian ZFS wiki describes pooled storage, checksums, snapshots, and software RAID, and explains that ZFS uses RAM for its Adaptive Replacement Cache (ARC). Debian Wiki: ZFS
A useful before-and-after record includes the same services and clients, the same storage activity, the same observation point, and the same memory fields on both systems. Note whether the reported number is free memory, available memory, process or service use, or cache. Without that context, a single number cannot tell you whether the system has more usable headroom or is simply caching differently.
Rank #4
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- 8GB RAM MEMORY & 256GB SSD STORAGE - GMKtec Nucbox G3S mini pc is prebuilt with 8GB DDR4 RAM, you will enjoy a speedier experience with Built-in 256GB M.2 2242 SSD Hard Drive. Our mini desktop pc boots up in seconds, work on multiple browser tabs, software applications and quickly transfers files
- RICH INTERFACE - Nucbox G3 Plus mini computer is equipped with USB 3.2, up to 10Gbps/S, HDMI(4K@60Hz)×2, 3.5mm Audio Jack. Supports WiFi 5, and Gigabit Ethernet RJ45 1000MbE network connectivity, Bluetooth 5.0. This Mini PC supports multiple device connection and can be used with servers, monitoring equipment, office equipment, displays, projectors, televisions, etc
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Choose based on workload, maintenance, and recovery
There is no universal winner established by these figures. TrueNAS publishes storage and memory guidance; Cockpit lists administration functions for a Linux system. The better fit depends on what the server actually does and how much hands-on configuration you want to own.
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One-click scans. No signup required.
- Memory headroom: Compare both systems with the same workload and a clearly defined memory metric.
- Storage workflow: Decide which filesystem and pool tools you will use, and how shares, snapshots, and backups will operate.
- Administration: Cockpit can manage listed parts of a Linux host through a browser, while shell access and automation remain options. Confirm each required task is covered by the tools you configure.
- Recovery: Write down how to restore the operating system, reconnect or import storage, restore configuration, and recover data from backups.
- Maintenance time: Account for the time needed to configure and maintain the Debian services and storage stack you choose. A smaller memory footprint is only one part of the trade-off.
Debian release and installation context
As of October 7, 2026, Debian’s official release FAQ identifies Debian 13, “trixie,” as stable. Its installation guide provides instructions by architecture. Package versions, repositories, and commands can change, so check the official guide and the packages available for the particular server before following installation steps. Debian trixie Installation Guide
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- 【𝟴𝙂𝘽 𝙍𝘼𝙈 + 𝟭𝟮𝟴𝙂𝘽 𝙎𝙎𝘿 𝙎𝙩𝙤𝙧𝙖𝙜𝙚 — 𝙀𝙭𝙥𝙖𝙣𝙙𝙖𝙗𝙡𝙚 𝙎𝙩𝙤𝙧𝙖𝙜𝙚 𝙔𝙤𝙪𝙧 𝙒𝙖𝙮】 Ready to use out of the box with 8GB RAM and 128GB storage for smooth multitasking. Need more space? Pop open the chassis to find an M.2 SSD slot (supports NVMe/SATA) and a TF card slot (up to 512GB) — easily add storage for homelab file servers, media centers, or system logs. The scalable design grows with your needs.
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- 【𝙒𝙞𝙣 𝟭𝟭 + 𝙇𝙞𝙣𝙪𝙭 𝘾𝙤𝙢𝙥𝙖𝙩𝙞𝙗𝙡𝙚 — 𝙊𝙣𝙚 𝙈𝙖𝙘𝙝𝙞𝙣𝙚, 𝙀𝙣𝙙𝙡𝙚𝙨𝙨 𝙍𝙤𝙡𝙚𝙨】 Fully compatible with Windows 11, OPNsense, OpenWrt, Untangle, Debian, Ubuntu, Proxmox, VMware ESXi and XCP-ng ( SR-IOV is not available). Unlocked BIOS supports Auto Power On, Wake-on-LAN & PXE Boot for headless deployment. Equipped with USB 3.2, full-function Type-C, HDMI 2.0 and audio jack. Ideal for home firewall, IoT gateway, homelab hypervisor and small business server deployments.
Debian documents USB memory sticks as one way to obtain and install the system, but a USB stick is optional installation media—not a required purchase if you already have suitable media. Getting and installing Debian GNU/Linux
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