Everything you need to build your own DIY NAS

Want to go it alone? Here’s how you can build your very own NAS.

When it comes to network-attached storage, there are two routes to go down for setting up your own server. The first is by using the best NAS enclosure and installing a few hard drives. The second is to go it alone and build your own NAS from scratch.

Building a NAS for general home use, be it for storing files or managing some home security hardware, doesn’t require range-topping PC parts. You can easily get away with an affordable Intel processor and some other cheaper parts that help bring the cost down compared to enclosures.

When it comes to building a NAS for Plex,m this is where specifications matter a little more. If you’re considering 4K transcoding, you will require a considerably powerful processor. Everything else can largely remain the same as the home NAS build.

In this guide, I’m going to run you through precisely what you’ll need to build your own DIY NAS.


It all starts with the case. Any PC chassis will do, but you will need to take into account the number of drives that can be installed. The more bays available, the more drive you can install and the larger the available capacity will be.

I’d recommend something like the SilverStone DS380B. It has support for up to 12 drives, four being fixed 2.5-inch bays and eight supporting hot-swappable 3.5-inch drives. There’s enough internal space for a graphics card though you will need to use the PCI slot for SATA expansion as only a Mini-ITX motherboard will fit here.

SilverStone DS380B
SilverStone DS380B (Source: SilverStone)

SilverStone DS380B

The SilverStone DS380B is quite the PC case. It’s designed specifically with NAS in mind, supporting ITX motherboards and having more than enough bays for all your NAS hard drives.


The motherboard is the most important component of a PC build and the same goes for NAS. We’d ideally want to pick a motherboard with countless SATA ports so plenty of drives can be connected, but that would mean going with a bulkier case.

The ASUS ROG Strix B660-I Gaming WiFi is a brilliant motherboard with plenty to love. It’s compact enough, has support for up to 128GB of RAM, supports 12th Gen Intel processors, wireless connectivity, and has a PCI slot for adding a SATA expansion card.

ASUS ROG Strix B660 ITX Gaming-I WiFi
ASUS ROG Strix B660 ITX Gaming-I WiFi (Source: ASUS)

ASUS ROG Strix B660-I Gaming WiFi

The ASUS ROG Strix B660-I Gaming WiFi is an affordable motherboard that supports 12th Gen Intel processors. The four SATA ports can be complemented by an optional SATA PCI card.


The processor (or CPU) is what’s used to … well, process everything. It’s the brain of the computer, responsible for handling calculations, carrying out tasks, and running software on the NAS. The more powerful (and expensive) the processor, the more you’ll be able to perform on the NAS.

We’re big fans of the Intel Pentium Gold G7400. It’s a 46W processor, meaning you won’t require much in the form of cooling, has two cores with four threads, and can hit a clock speed of 3.7GHz. Couple this with DDR4 and DDR5 support, as well as Intel UHD Graphics 710 and you’ve got an excellent processor.

Should you require something with a little more performance, the Intel Core i5-12600K is a fantastic processor. It’ll work just fine with the motherboard we’ve selected above for the compact case, comes with 10 cores and 12 threads, and has beefier graphics for enhanced media consumption.

Intel Pentium Gold
Intel Pentium Gold (Source: Intel)

Intel Pentium Gold G7400

This 46W processor is all you need for a NAS. It has two cores and four threads, allowing you to do basic tasks and more on the server. Because it’s not too powerful, you won’t require advanced cooling.

Intel 12th Gen Core i5
Intel 12th Gen Core i5 (Source: Intel)

Intel Core i5-12600K

The Intel Core i5-12600K processor is a mid-range CPU. It has 10 physical cores and 12 threads, which makes it perfect for running a media server and so much more. This is also the best CPU for gaming, in our opinion.

Power supply

Being what supplies electricity to all the various components, the power supply is an incredibly important component. We’d always recommend spending a little more on a reputable branded PSU to ensure you won’t encounter any issues, especially with a NAS that will typically run continuously.

SilverStone is a big name in the PSU business and even manufactures units for other companies. The SX500-LG is an excellent powerhouse, offering up to 500W of power with an 80 Plus Gold rating for efficiency. The single 120mm fan is more than enough to keep it cool, not that you’ll hear it spin up.

SilverStone SX-500
SilverStone SX-500 (Source: SilverStone)

SilverStone SX500-LG

This 500W 80 Plus Gold-rated power supply from SilverStone is perfect for a NAS such as this build. It’s fully modular with a 120mm fan to keep everything adequately cooled. It’ll easily handle the Pentium or Core i5.

CPU cooler

In order to get the most out of the processor and other components inside our DIY NAS build, we’ll need to buy a CPU cooler. Intel doesn’t supply one with the Pentium or Core i5 processors we recommend. Because we’re using a more compact chassis, we’re going to need to be careful when picking out a cooler.

Luckily, there’s a low-profile cooler from Noctua that will do the job just fine for either CPU. Noctua is one of the leading brands when it comes to fans and the Noctua NH-L9i is about as good as it gets. It’s powerful enough to handle even a Core i7 processor.

Noctua NH-L9i
Noctua NH-L9i (Source: Noctua)

Noctua NH-L9i

The Noctua NH-L9i may be a small fan but it’s incredibly powerful. In fact, Noctua even rates this cooler high enough to handle an Intel Core i7, meaning we’ve got headroom with a future CPU upgrade.


Random access memory (RAM) is what is used by a device to store data for quicker access. These modules are like super-fast drives, allowing the operating system to store software and other files that can be quickly accessed at request. All data stored on RAM is cleared when the device is turned off.

We’d recommend the Kingston Fury Beast Black 16GB kit. It’s supported by both the Intel Pentium and Core i5 processors, has more than enough capacity for most scenarios, and has a speed rating of DDR5-4800 with a latency of CL38.

Kingston Fury Beast Black DDR5-4800 16GB
Kingston Fury Beast Black DDR5-4800 16GB (Source: Kingston)

Kingston Fury Beast Black 16GB

This kit from Kingston is all you need for a DIY NAS, whether it’s a simple server for storing backups or running Plex Media Server. It’s ideal for an Intel Pentium Gold or Core i5-12600K processor with a speed of DDR5-4800 and latency of CL38.

OS drive

The operating system (OS) drive is where we’ll be installing the main software that will manage the server. To free up all SATA ports for drives, we’re opting for an M.2 SSD since the Mini-ITX motherboard has an available slot.

The Samsung 970 EVO Plus is brilliant. It’s ideal for running an OS on, including popular NAS solutions. It’s one of the best SSD for NAS, largely down to the excellent value and rapid transfer speeds for data.

Samsung 970 EVO Plus
Samsung 970 EVO Plus (Source: Samsung)

Samsung 970 EVO Plus

We’re using an M.2 SSD for the operating system, which frees up all four SATA ports for data storage. Samsung’s 970 EVO Plus range is one of the best SSD for NAS for not only NAS but desktop and laptop PCs too.

Storage drives

The storage drive is what you’ll be using to store all your important data on the NAS. There are a few different models available and the two big players are Seagate and Western Digital. The differences between these two brands are negligible if you’re not too fussed about speeds, workloads, and other specs.

We’d recommend either the Western Digital Red or Seagate IronWolf range of 3.5-inch drives. They’re designed specifically for NAS use and are included in our best NAS drives collections.

Western Digital Red
Western Digital Red (Source: Western Digital)

Western Digital Red

Western Digital’s Red series of hard drives are excellent for NAS enclosures. Ranging between 2TB and 6TB, you can install up to eight of these drives in the NAS. they’re not the best around, but you won’t decimate your budget by buying a few.

Seagate IronWolf
Seagate IronWolf (Source: Seagate)

Seagate IronWolf

I’m a big fan of Seagate’s IronWolf series of NAS hard drives. If you’re serious about storage, the Pro range offers a few advanced extras.

Operating system

The best operating system depends on personal preference and what you feel comfortable using. It’s possible to use a desktop-class OS like your favorite Linux distro or Windows, but we’d recommend something like FreeNAS or Open Media Vault if all you plan to do is store some files and maybe run a Plex Media Server.

There are a few good operating systems out there and some even try to take what comes with a prebuilt NAS enclosure and replicate the user experience. Xpenology is a great example of this, taking Synology’s class-leading NAS OS and making it available to everyone.

By Richard Edmonds

I've been covering the tech industry for more than a decade and have tinkered with NAS for just as long. Follow my ramblings and more right here on NAS Master!

To help keep the lights on, I may earn a commission for purchases using links to buy recommended products.