Synology DS423+ vs DS923+ NAS – Which Should You Buy in 2024?

Synology DS423+ vs DS923+ NAS – Which Should You Buy

Buying your first network-attached storage device can be really intimidating! If you have spent the better part of a decade storing your personal or business data on public cloud services or in a drawer full of USB drives, but have now taken the grown-up decision to go ahead and migrate over to your own private network-attached storage (NAS). You might have done this for reasons of cost, centralization or perhaps for security, whatever the reason for your data migration, there is simply no denying that the world of NAS can be a fraction complex and confusing early doors. Like any kind of modern computer appliance, you want to make sure you buy right the first time and when it comes to choosing between two of the latest generations of Synology NAS devices, these two incredibly similar four-bay devices might be two of the most different solutions I have ever compared. The Synology DS423+ is a home and small business-focused compact NAS designed to leverage an affordable price point between reasonable hardware and reasonable software and abilities. The slightly older Synology DS923+ (by 6+ months), on the other hand, has much of a high and even in some places entry enterprise-level focus about its architecture and is needless to say the more expensive of the two. Nevertheless, both of these Synology NAS devices can be picked up for around $450 to $600 (without drives), the contrast between their pricing, are actually very different beasts. Therefore, for users that don’t quite know their AMD embedded from their Celeron integrated processors, or who aren’t sure of the benefits that ECC can bring, today I want to compare the Synology DS423+ and Synology DS923+ and help you decide which one best deserves your data!

Just before we get into the meat and potatoes of this comparison, it is worth highlighting that regardless of whether you buy the Synology DS923+ or DS423+, you are guaranteed to get a system that can perform all of the following:

• Both units feature x86 processors, which allow a wide degree of app/services to run well and are a good price vs hardware balance
• Both the DS923+ and DS423+ are constructed of plastic desktop compact chassis, thereby reducing power consumption, noise and heat generated
• Both can Stream 1080p HD or 4K media, with superior performance natively and mid-range performance in Plex
• Both the Synology DS923+ and DS423+ NAS support AI-supported photo and ‘thing’ recognition supported to a very high degree from the free branded software included
• For Business users who currently enjoy the use of Google Workspace or Office 365, both of these NAS provide excellent means to backup your mass cloud accounts (as well as natively sync, dupe and configure rules on the fly)
• Both the DS423+ NAS and DS923+ NAS support snapshots, for more incremental and version protecting failsafe in efforts to protect you from Malware and Ransomware attacks, by allowing multi-versioning storage history to browse through and restore
• Both units are DLNA certified so can be accessed, browsed and played from by popular DLNA devices, such as Amazon Firestick, Alexa, Google Home Chromecast, Apple TV, Bose, Sonos, iPads, etc, as well as connectivity between these platforms with IFTTT
• Both are multi-bay, RAID enabled devices NAS devices that support JBOD, RAID 0, RAID 1, RAID 5, RAID 6 and RAID 10 (as well as Synology Hybrid RAID too for their Plus series range), though it is worth highlighting the DS923+ is the only one that supports an expansion and therefore also can support RAID 5, RAID 6, RAID 10 and SHR-2 over an expansion (more on that later)
• Both devices run on their own proprietary operating system that can be accessed remotely or locally. These include regular updates to the firmware, security patches, applications and more. Ranging from multimedia, home and multi-tiered backup applications, to more business end tools such as Surveillance software, Virtual Machine deployment and business-class backup and synchronization tools.
• Both the DS423+ and DS923+ use and can be accessed equally by a multitude of mobile applications such as DS File, DS Video, DS Photo, DSCam and DS Music that are created by and constantly improved by Synology.
• Both NAS are completely compatible with Windows, Android and Mac systems, as well as acting as a bring between software platforms to share and distribute files for migration and file sync]
• Both units can be used as a mail and/or business servers, providing excellent 3rd party CRM and first-party CMS systems, as well as the fantastic Synology collaboration Suite of applications Chat, Drive, Mail, Calendar, Office and Active Backup Suite
• Both systems will support DSM 7.1 or DSM 7.2 out the box, as well as support software updates (security and feature) for many years moving forward
• Both systems support the Synology Surveillance Station applications, support numerous cameras and arrive with 2 camera licenses with your purchase

But you didn’t come to this comparison page to find out what they had in common, you wanted to know what makes them different and which one best suits your needs, so let’s crack on with this comparison.

Synology DS423+ vs DS923+ NAS – Price and Value

Now, for those of you that are keeping a very close eye on the budget, it will already be clear to you that the Synology DS423+ is the lower-priced NAS of the two, by quite a considerable margin! Arriving, depending on where you are in the world, for around $449 to $499, it will immediately look more appealing to those on a tight budget when compared against the $549 to $599 of the DS923+. And that is before you’ve gone ahead and purchased any storage media too, so that’s saving of $100 to $150 could go a long way to further bolstering your network-attached storage setup. So, if the most important thing to you right now is remaining within a tight budget, then it might be worth seeing to read the rest of this article as when comparing DS423+ and DS923+, we have to look considerably more at the subject of value, not price. Price. Both of these devices arrive with the same software, Synology DSM 7.2, as well as both systems being two drive NAS solutions that support nearly identical ranges of storage media too, but more on that later. In terms of physical size, the range of components, they are pretty darn similar at a casual glance. However, it is in terms of the individual hardware components and scalability where the Synology DS923+ shows its worth, which we will cover shortly in the hardware section. But at least in terms of numerical value, the Synology DS423+ carries the lead. However, the reality isn’t quite that simple:

This is because the Synology DS923+ was released approx than half a year earlier than the DS423+ (Nov 2022 vs April 2023) and because of its wider availability and longer presence in the market, it has been featured in numerous special offers throughout that time. We saw this near $500 NAS on a few considerably impressive special offers throughout Amazon Prime day and other smaller eShop-specific events. So, yes, the DS423+ is the lower-priced NAS of the two, but do make a point of checking your local online retailer to see if the DS923+ is on special offer right now!

Synology DS423+ vs DS923+ NAS – Hardware and Connections

The hardware architecture of the DS423+ and DS923+ clearly have two very different target audiences in mind. The DS423+ has more of a home and multimedia feel about it, while the DS923+ feels substantially more like a business solution. This is reflected in numerous areas such as the distinct differences in CPU, memory specifications, and potential for growth. Even if you were to take into account the affordability of the DS423+, it has to be said that in the majority of hardware available, the DS923+ is significantly more powerful and scalable in practically every way. Here is a brief summary of the key hardware highlights of either system, side-by-side:

Synology DS423+ vs DS923+ NAS Hardware Comparison
Synology NAS
Amazon Price:	$479 (Amazon 25/02/24)	$599 (Amazon 25/02/24)
Processor model	Intel Celeron J4125 (2019 Gen)	AMD Ryzen R1600 (2020 Gen)
processor architecture	64-bit	64-bit
processor clock	4-core 2.0 (base frequency) / 2.7 (burst frequency) GHz	2-core 2.6 (base frequency) / 3.1 (max overclock) GHz
Integrated Graphics	Yes (250-750Mhz)	No
Hardware encryption engine (AES-NI)	Yes	Yes
system memory	2 GB DDR4 non-ECC	4 GB DDR4 ECC
Pre-installed memory modules	Yes	4GB (4GB x 1) via SODIMM
Total number of memory slots	1	2
Maximum memory capacity	6 GB (2 GB + 4 GB)	32GB (16GB x 2)
The maximum number of disk slots for an expansion unit	N/A	7 (DX517 x 1)
M.2 drive bay	N/A	2 (NVMe, PCIe 3×1)
Compatible Disk Type	3.5″ SATA HDD 2.5″ SATA SSD	3.5″ SATA HDD 2.5″ SATA SSD M.2 2280 NVMe SSD
Disk hot-plug support*	Yes	Yes

So first and foremost, we need to discuss the main differences between the CPUs available here. The Intel Celeron found inside the DS423+ is a four-core, four-thread processor with a clock speed of 2.0 GHz that can be burst to 2.7 GHz when needed. However, despite the age of this CPU, which was released towards the end of 2019, it is the integrated graphics of this processor that gives it a slight edge for some users in terms of NAS deployment- especially those looking at multimedia use for their system. For users that are looking at the manipulation of graphical data, or more commonly are using the NAS as a multimedia server and wish to convert dense multimedia into something more manageable locally (for example, converting a dense 4K file into a much smaller and portable version to watch on the phone whilst commuting to work, on the fly), integrated graphics allow the NAS to perform this task with much lower overall resource consumption.

Thanks to it having a more specialized tool to get this job done. The embedded Ryzen R1600 processor on the other hand, lacks the integrated graphics and is a dual-core processor instead of a quad-core. However, it substantially makes up for this by being a much more powerful dual-core processor, with four threads that allow the system to assign system resources in a similar way to that of having multiple cores. Equally, the clock speed is noticeably higher here with the DS923+ CPU having a 2.6 GHz base power that can be burst when needed to 3.1 GHz. It is true that in cases of graphical manipulation or multimedia conversion, the AMD CPU here will be far less efficient and capable. However, in practically every other way, it is superior to that of the J4125 inside the DS423+. And if you are more concerned with traditional file transfer speeds internally and externally, the DS923+ will comfortably be the better-performing NAS.

 

The CPU choices in the DS423+ and DS923+ also result in very different memory architectures in each device, which will undoubtedly result in different scalability in the long term. The DS423+ arrives with 2GB of 2666Mhz memory, soldered to the main controller board, which can be further expanded via an available SODIMM memory slot to 6 GB total. This may be a little disheartening when you find out that the CPU here is actually capable of supporting 8 GB maximum memory. However, due to that initial 2GB memory being fixed internally, you cannot officially exceed 6 GB physically. This shortfall is considerably magnified when you bring into comparison the DS723’s memory structure. It arrives with 4GB of DDR4 3200Mhz memory which can be expanded to a whopping 32 GB total across two available SODIMM slots. Additionally, the system arrives with error-correcting code (ECC) memory, which ensures that data that passes through the memory during write operations will have its integrity checked by a separate module on the memory of the system. If any irregularities or inconsistencies are spotted, that data will be repaired. This goes a long way to reassure any doubts around the integrity of long-term archival data and susceptibility to things like bit rot. This is one of the main reasons why the DS923+ is considered much more of a business solution overall.

Much like the memory choices by Synology in these two NAS devices, the ports and connections of them both are similar, but one is definitely more scalable than the other. Both systems arrive with standard gigabit ethernet connectivity, with two available ports that each will provide up to a maximum 109 megabytes per second. Both systems also arrive with USB 3 connectivity, but it is only 5GB gen 1 USB. However, it is from here onward that the DS723 massively upscales things:

Model ID	Synology DS423+	Synology DS923+
Synology NAS
RJ-45 1GbE LAN port*	2 (Supports Link Aggregation / Failover)	2 (Supports Link Aggregation / Failover)
USB 3.2 Gen 1 port*	2	2
eSATA port	0	1
USB Copy	Yes (inc. Physical Button)	Yes
PCIe expansion	N/A	1 x Gen3 x2 LAN card slot
system fan	92 mm x 92 mm x 2 pcs	92 mm x 92 mm x 2 pcs
fan mode	full speed mode low temperature mode silent mode	full speed mode low temperature mode silent mode
Front panel LED indicators with adjustable brightness	Yes	Yes
Noise value*	19.8dB(A)	22.9 dB(A)
wake on lan	Yes	Yes
Power Supply / Transformer	90W	100W
AC input voltage	100V to 240V AC	100V to 240V AC
current frequency	50/60 Hz, single frequency	50/60 Hz, single frequency
Power consumption	28.3 W (access) 8.45 W (disk hibernation)	35.51 W (access) 11.52 W (disk hibernation)

For a start, the DS923+ features an eSATA external port that is used to connect the official Synology 5-bay expansion device, the DX517. This means that while the DS423+ has a maximum long-term capacity of four SATA drives, the DS923+ allows you to expand your storage down the line by an additional five SATA bays (so 9 Bays total). This can be done gradually and this storage can either mirror the original NAS or extend the storage pool across both devices.

Scalability and expandability do not stop there though, with the DS923+ also having the option to add a network adapter upgrade module (the E10G22-T1-MINI) to increase your network bandwidth to 10GbE. This is going to be incredibly useful for users who plan on taking advantage of SSDs or plan on having a much busier network environment between the NAS and multiple users and tasks at any given time. And it doesn’t stop there! Though BOTH systems also features two SSD bays on its base for installing M.2 2280 SSD modules (which can be used for caching or as raw storage pools, depending on which drive you use), the DS423+ is a Gen 2 PCIe lane system, whilst the DS923+ is a Gen 3 system – resulting in double the bandwidth per lane (ultimately, the difference between 500MB/s max per SSD on the DS423+ and 1,000MB/s on the DS923+). This is a feature that, although growing more common across Synology’s NAS portfolio, it is still unavailable on many of their lower tier/affordable systems (such as the DS224+) and, alongside the lack of storage expansion support, the gen2 speeds on these bays will place limits the storage potential long term on the more affordable NAS.

Finally, we need to discuss storage media compatibility, as this has grown to be another thing that has changed the way in which a user can populate their NAS quite a lot in recent years. On the list of storage media that they are prepared to verify as compatible with their systems. Although technically, one could say that any SATA media drive would be compatible with a SATA NAS, there are still a few incredibly isolated examples of compatibility, durability and stability. Synology requires that all drives need to be officially checked and verified before they’re prepared to add them to their list in order to truly guarantee that a user will get the promised Synology experience from their hardware with that media. As questionable as this might sound, the result is that the list of compatible storage media for both of these devices, despite their incredible similarities, is actually pretty darn different. Take a closer look at the slideshow below of compatible HDDs from WD and Seagate on these two NAS systems (from 21st July 2023) and see if you can spot an odd inconsistency:

In the case of the DS423+, we see a smaller pool of supported storage media, as well as a lower list of larger capacity drives being featured also. The DS923+, on the other hand, seemingly has a larger pool of more high capacity drives added and available to it, as well as a larger range of Synology’s own drives available for use with that system that includes the higher end options in the HAT5300 range. Synology has clearly prioritized higher-end drives for more advanced Synology systems, but for those that like to use their system clearly and rigidly within the defined parameters of a brand to maintain their warranty/guarantee, this is going to be a little disheartening to see the smaller pool of verified compatible storage media on the more affordable NAS solution. This is something that may well change over time as more drives are added to verified compatibility lists, but Synology has not exactly been putting their foot on the gas here. Given how close these two systems have been released side by side and the large disparity between their compatibility lists, I can’t see a huge amount of change happening anytime soon. It is absolutely no surprise that the more expensive Synology NAS has a better degree of hardware options in the long term. Though, it should be highlighted that a lot of the real benefits available in the DS723 are optional extras, long-term scalability and upgrades that are not necessarily available in the default model. It could be very easily argued that you are paying for entry to then pay extra for delivering upgrades, SSD upgrades, storage scalability, and increasing your memory years from now. Nevertheless, the fact that the baseline memory is ECC and the AMD CPU is indeed more powerful in most ways, does make up some of that additional cost and ultimately mean that in terms of hardware and connectivity, the DS923+ is the better of the two.

Synology DS423+ vs DS923+ NAS – Software and Services

At the risk of being incredibly repetitious, both of these devices are remarkably similar in what they can do in Synology’s premium DSM software platform, but the scalability and scope provided by the DS923+ inevitably leads to that more expensive system, ultimately giving you just more resources with which DSM can utilize. In terms of the actual range of applications, services supported on either system and scope for use right out of the box, both the DS423+ and DS923+ have got more than enough to run every single available app and tool available in DSM 7.2. Despite their rather modest scale, both systems can run multiple virtual machines, host a fantastically capable surveillance solution with numerous cameras, both can provide an excellent Plex media server experience (with a slight edge to the DS423+ in terms of conversions and transcoding when needed), and in terms of backups, both systems support the full range of services from Hyper Backup and Active Backup Suite. If you are a small business or just a small group of users who are going to be interacting with either of these NAS units fairly regularly, you’re going to have a largely identical experience in either one of these two systems using the baseline default hardware. However, things will change as soon as you start moving into larger simultaneous access, more high-volume application exchanges between the system and client hardware, and the scope of each one of those individual processes growing over time. In terms of the escalation of accessing the services of DSM and long-term future-proofing of a system running at top speed, despite growing requirements and demands of the system, the DS923+ comfortably wins.

Synology NAS	Synology DS423+	Synology DS923+
Maximum single volume capacity*	108TB	108TB
Maximum number of storage spaces	64	64
M.2 SSD volume support*	Yes	Yes
SSD Read/Write Cache (White Paper)	Yes	Yes
SSD TRIM	Yes	Yes
Support RAID disk array type	Synology Hybrid RAID Basic JBOD RAID 0 RAID 1 RAID 5 RAID 6 RAID 10	Synology Hybrid RAID Basic JBOD RAID 0 RAID 1 RAID 5 RAID 6 RAID 10
file agreement	SMB/AFP/NFS/FTP/WebDAV	SMB/AFP/NFS/FTP/WebDAV
Maximum simultaneous SMB/AFP/FTP connections	500	1000
Maximum number of simultaneous SMB/AFP/FTP connections (with extended memory)	1500	2000
Windows Access Control List (ACL) Integration	Yes	Yes
NFS Kerberos authentication	Yes	Yes
Maximum number of local user accounts	2048	2048
Maximum number of local groups	256	256
Maximum number of shared folders	256	512
Maximum Shared Folder Sync Tasks	8	16
VMware vSphere with VAAI	N/A	Yes
Windows Server 2022	N/A	Yes
Citrix Ready	N/A	Yes
OpenStack	N/A	Yes
Media Server	Yes	Yes
DLNA compatible	Yes	Yes
Synology Photos	Yes	Yes
face recognition	Yes	Yes
Snapshot Replication	Yes	Yes
The maximum number of snapshots supported by a single shared folder	1024	1024
Maximum number of system snapshots	65536	65536
Surveillance Station	Yes	Yes
The maximum number of cameras supported (camera authorization is required)	40 (including 2 sets of free licenses	40 (including 2 sets of free licenses
Frames per second (FPS) (H.264)	1200 FPS @ 720p (1280×720) 800 FPS @ 1080p (1920×1080) 350 FPS @ 3M (2048×1536) 280 FPS @ 5M (2591×1944) 170 FPS @ 4K (3840×2160)	1200 FPS @ 720p (1280×720) 1050 FPS @ 1080p (1920×1080) 600 FPS @ 3M (2048×1536) 360 FPS @ 5M (2591×1944) 200 FPS @ 4K (3840×2160)
Frames per second (FPS) (H.265)	1200 FPS @ 720p (1280×720) 1200 FPS @ 1080p (1920×1080) 600 FPS @ 3M (2048×1536) 480 FPS @ 5M (2591×1944) 200 FPS @ 4K (3840×2160)	1200 FPS @ 720p (1280×720) 1200 FPS @ 1080p (1920×1080) 1000 FPS @ 3M (2048×1536) 600 FPS @ 5M (2591×1944) 300 FPS @ 4K (3840×2160)
Synology Drive	Yes	Yes
Recommended number of clients that can sync simultaneously	350 (the number of devices that can be connected at the same time when the recommended number of stored files is reached)	350 (the number of devices that can be connected at the same time when the recommended number of stored files is reached)
Recommended number of files to store	5,000,000 (Applicable to files indexed or belonging to Synology Drive , files accessed through other protocols, please refer to the file service in the above field)	5,000,000 (Applicable to files indexed or belonging to Synology Drive , files accessed through other protocols, please refer to the file service in the above field)
Synology Office	Yes	Yes
Maximum number of users	1200	1200
Video Station	Yes	Yes
Virtual Machine Manager	Yes	Yes
Recommended number of virtual machines	2 (see more)	4 (see more)
Recommended number of Virtual DSMs (licensing required)	2 (including 1 set of free licenses)	4 (including 1 set of free licenses)
VPN Server	Yes	Yes
Maximum number of connections	40	40
Synology High Availability	Yes	Yes
log center	Yes	Yes
Number of logs received per second	800	800
Backup folders and packages	Yes	Yes
backup the whole system	Yes	Yes
Remark	Full system backup requires DSM 7.2 or later.	Full system backup requires DSM 7.2 or later.
Maximum number of Hybrid Share folders	10	10

Notwithstanding that the system has a much higher clock speed CPU that, despite only being a dual-core processor, features a four thread architecture with DSM, allowing a lot of the spreading of resources normally associated with cores to be made available with vCPU allocation (containers, virtual machines and just natively). Then there is the scope for the larger overall capacity available to be upgraded towards in terms of memory, with the rather modest 6GB of memory on the DS423+ looking quite underwhelming when compared against the whopping 32 GB maximum memory that is scalable on the DS923+. That ultimately adds up to the more expensive NAS system having a better opportunity to grow alongside a more demanding data storage network of connected devices and users over time. And we haven’t even touched on the performance benefit in DSM and all of the first and third party applications when we factor in support of Gen3 SSDs for caching or storage pools in the DS923+, both of which are going to allow much better, long-term utilization and overall, a much smoother experience for a considerably longer amount of time than that of the DS423+. Ultimately, if you think your utilization of the NAS is going to grow steadily and increasingly over time, the DS923+ is the better choice here in terms of software, in and out of DSM.

Synology DS423+ vs DS923+ NAS – Conclusion and Verdict

Unsurprisingly, what we have here is an old-fashioned case of getting what you pay for. The DS423+ is a very solid, and reliable NAS solution and is definitely more than capable of running the bulk of modern NAS hardware needs, also, remaining pretty flexible in the resources available to it on day one to get the job done. Equally, for home users and particularly those seeking a more flexible approach to multimedia, the DS423+ does bring a decent amount of bang for buck when you compare it against the bulk of other Synology solutions in the brand’s portfolio. But it just pales in comparison to the sheer scope of scalability, upgrade options and flexibility long-term that the DS923+ provides. And regardless of whether you’re a business user or a home user that may perhaps be looking to do something more aggressive with their storage down the line, the DS923+ justifies a lot of the extra expense, simply by the weight of it having that ECC memory, twice the default memory on day 1, Gen3 SSD NVMe storage options, expandability, 10G as an optional extra and the scale of how far you can upgrade the memory. As mentioned earlier, we have to at least acknowledge that a lot of these advantages that the DS923+ presents compared with the DS423+ are ones that you will only really take advantage of if you spend a little bit more money, but having the option for that scalability down the line for many users is going to be worth the investment on day one. Side by side, in most cases, the DS923+ will comfortably outperform the DS423+ even in the default model, so you still aren’t losing out just because you’re paying extra for upgrade options you may not use later down the line.

Synology NAS
Amazon Price:	Synology DS423+ NAS $479 (Amazon 25/02/24)	Synology DS923+ NAS $599 (Amazon 25/02/24)

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