TerraMaster F4-423

TerraMaster F4-423 vs. Synology DiskStation DS920+: Which NAS is best?

Comparing the TerraMaster F4-423 vs. Synology DiskStation DS920+ is an interesting endeavor as the latter has been replaced by the newer Synology DiskStation DS923+. Still, many may be wondering just how much better the F4-423 is than the DS920+ or vice versa. This guide will walk you through all the similarities and differences between the two NAS.

TerraMaster F4-423

Better value NAS

TerraMaster F4-423
TerraMaster F4-423. (Source: TerraMaster)
  • More affordable
  • More powerful Intel CPU
  • M.2 SSD slots
  • Rougher NAS OS
  • No expansion support
  • Weaker app support

TerraMaster makes some of the best value NAS on the market and the F4-423 is a brilliant enclosure for those who want the most bang for their buck. Rocking an Intel Celeron processor, M.2 slots, and 2.5GbE networking, this is one powerful NAS for running Plex and more.

Synology DiskStation DS920+

The best NAS OS

Synology DiskStation DS920+
Synology DiskStation DS920+. (Source: Synology)
  • M.2 SSD slots
  • Expansion support
  • Weaker CPU
  • More expensive
  • Older platform

The Synology DiskStation DS920+ is an older enclosure and has been replaced by the newer DS923+ with an AMD Ryzen processor. This four-bay enclosure may still be worth considering if you can locate it at a reasonable price, or keep it if you already own one.

The Synology DiskStation DS920+ is the older NAS of the two and has a more established operating system and app catalog. The TerraMaster F4-423 has newer hardware, a more powerful processor, and faster networking. It’s the best NAS on paper but has slightly weaker app support.


TerraMaster F4-423 vs. Synology DiskStation DS920+: Which NAS is best?
Synology DiskStation DS920+. (Source: NM)

The Synology DiskStation DS920+ used to be the king of Plex NAS, rocking a capable Intel Celeron processor, enough RAM to stream just about anything to multiple devices, and M.2 slots for improving performance. Things have changed since it launched and now even TerraMaster is offering more powerful enclosures that make for great media servers.

The TerraMaster F4-423 comes with the Intel Celeron N5095, a four-core processor with a maximum burst speed of 2.9 GHz. The older DS920_ has the Celeron J4125 with the same four cores but a slightly slower clock speed of 2.7 GHz. The latter also has slightly weaker graphics processing. There’s not too much in it between the two enclosures, but the F4-423 comes out on top.

The same goes for system memory. It’s possible to upgrade the RAM on both enclosures but TerraMaster officially supports a capacity of up to 32 GB whereas the Synology NAS is only capable of handling 8 GB. Both enclosures have four drive bays for up to 80TB of storage capacity and two M.2 slots for installing speedy NVMe caching SSDs. Neither NAS can use these slots for storing data.

TerraMaster F4-423Synology DiskStation DS920+
CPUIntel Celeron N5095
(4-core, 2.9 GHz burst)
Intel Celeron J4125
(4-core, 2.7 GHz burst)
RAM4 GB DDR4 (max 32 GB)4 GB DDR4 (max 8 GB)
Drive bays4 SSD/HDD4 SSD/HDD
Capacity80 TB80 TB
Expansion support2x PCIe 3.0 M.21x DX517
2x PCIe 3.0 M.2
Cooling2x 80 mm fan2x 92 mm fan
Ports2x 2.5 GbE
2x USB-A 3.2 Gen 1
2x 1 GbE
2x USB-A 3.2 Gen 1
1x eSATA
Power draw~35.2 W~35.51 W
Dimensions227 x 225 x 136 mm166 x 199 x 223 mm
Weight3.6 kg2.24 kg

Another point in favor of TerraMaster’s NAS is networking with the F4-423 coming with two 2.5GbE ports. The older DS920+ has two 1GbE ports. Power draw is similar between the two NAS, though the design is vastly different.

Price and availability

The Synology DiskStation DS920+ is a few years old now and launched with an MSRP of $600. The TerraMaster F4-423 is priced at $500 at launch. Both NAS can frequently be found on sale though it’s worth mentioning how much more affordable the F4-423 is, especially when factoring in additional cost for hard drives.


TerraMaster F4-423
TerraMaster F4-423. (Source: NAS Master)

The TerraMaster F4-423 and Synology DiskStation DS920+ couldn’t look more different. The former has an aluminum silver finish and doesn’t resemble anything else on the market. The DS920+, on the other hand, has a similar black metal and plastic design we’ve come to know and love with most enclosures on the market. Accessing the drive byas requires no tools with either NAS.

The rear of the F4-423 and DS920+ are where the majority of connections are present, including networking, DC input from external power supplies, and USB ports. The DS920_ does provide easier access to the M.2 SSD and DIMM slots for upgrades. TerraMaster requires the outer shell to be removed.


The Intel Celeron range of processors is great for NAS such as the TerraMaster F4-423 and Synology DiskStation DS920+. TerraMaster’s F4-423 has the Intel Celeron N5095 with four physical cores and a burst clock speed of 2.9 GHz. This is a better offering than the DiskStation DS920+ and its Celeron J4125, which is only capable of hitting up to 2.7 GHz.

Both NAS enclosures are great at running Plex, transcoding media, storing data, and running other apps, but the F4-423 is simply better at doing so before breaking a sweat. We attempted to stream media on both NAS and enjoyed a smooth experience transcoding 4K content. We didn’t encounter any buffering or stuttering issues.

Either NAS has ample performance available for home and office use. The enclosures are capable of running just about any available app without trouble. Even though TerraMaster’s TOS is slightly rougher around the edges, it’s still worth using if you prefer the more powerful system.

TerraMaster F4-423 vs. Synology DiskStation DS920+

The TerraMaster F4-423 is the best NAS for the two. It offers better value and specifications at a lower price. The operating system may not be as good as DiskStation Manager and the selection of apps isn’t as good as Synology’s store, but it’s well worth it if you don’t mind a slightly rougher experience.

TerraMaster F4-423

TerraMaster F4-423
TerraMaster F4-423. (Source: TerraMaster)

The TerraMaster F4-423 is the better NAS for Plex and other apps on paper. It has a more powerful list of specs at a more reasonable price.

If you already own the Synology DiskStation DS920+, we’d recommend sticking with the enclosure for the time being. It has all the performance required for running all available apps from Synology and beyond and is capable of supporting an expansion unit. It’s an older platform but one still worth using today.

Synology DiskStation DS920+

Synology DiskStation DS920+
Synology DiskStation DS920+. (Source: Synology)

Synology’s DiskStation DS920+ is a favorite of many for running Plex Media Server, thanks to the processor, expandable storage and RAM, and a great operating system.

Richard Pinnock-Edmonds Avatar

Read more