Synology RS3621XS+, RS4021XS+ and RS3621RPxs Specifications Revealed

Brand New Rackstation NAS – FULL RS3621xs+, RS3621RPxs and RS4021xs+ Specifications Revealed

Good news for those looking at purchasing a new generation rackmount NAS from Synology, with the news that their 2017 generation XS rackstation series has been replaced with a new 2021 range, resulting in the new RS3621xs+, RS4021xs+ and RS3621RPxs Rackstation NAS. These three NAS systems were already revealed a little over 2 weeks ago on NASCompares (forgive the self-plug!) but only now have the specifications been fully fleshed out. These systems are very similar to their previous generation in a few ways, with only small but significant changes between the respective generations in architecture in the case of each device. These product families have always been some of the heaviest hitting system’s in their portfolio, producing the very best experience of DSM as a whole, as well as all of the 3rd party platform support we have come to expect. In fact, last year I publish a video regarding the best multi-user 4K and 8K editing solution for post production companies for £10K and the predecessor to the new RS4021xs+ was that very NAS. Therefore I am interested in seeing what the newer generation can do in order to top this. Let’s take a closer look.

What Are the Hardware Specifications of theRS3621xs+, RS3621RPxs and RS4021xs+ NAS?

Although the DSM (Diskstation Manager) software is really where the bulk of the innovation in a Synology NAS comes from, it would be remiss not to remember that you still need some high-grade hardware at your disposal, to provide both incredible performances, inside and out. All three of the RS3621xs+, RS3621RPxs and RS4021xs+ provide an Intel Xeon (Broadwell) based server system at 6/8 cores, up to 64GB of memory and arrive with a multitude of network connectivity options, PCIe upgradability and storage potential. Each is scaled to prioritize Storage, Power or Both. Take a look at the specifications below:

Note: Green Text means that it is the best option of the three NAS units in this field.


How the RS3621RPxs , RS3621xs+ and RS4021xs+ Compare?
 
CPU Architecture
Synology RS3621RPxs

Synology RS3621xs+

Synology RS4021xs+

CPU Model Intel Xeon D-1531

Intel Xeon D-1541

Intel Xeon D-1541

CPU Architecture 64-bit 64-bit 64-bit
CPU Frequency 6-core 2.2 (base) / 2.7 (turbo) GHz 8-core 2.1 (base) / 2.7 (turbo) GHz 8-core 2.1 (base) / 2.7 (turbo) GHz
Hardware Encryption Engine (AES-NI) YES YES YES
System Memory 8 GB DDR4 ECC UDIMM 8 GB DDR4 ECC UDIMM 16 GB DDR4 ECC UDIMM
Memory Module Pre-installed 8 GB (8 GB x 1) 8 GB (8 GB x 1) 16 GB (16 GB x 1)
Total Memory Slots 4 4 4
Maximum Memory Capacity 64 GB (16 GB x 4) 64 GB (16 GB x 4) 64 GB (16 GB x 4)
Drive Bays 12 12 16
Maximum Drive Bays with Expansion Unit 36 (RX1217/RX1217RP x 2) 36 (RX1217/RX1217RP x 2) 40 (RX1217/RX1217RP x 2)
Compatible Drive Type* (See all supported drives)
  • 3.5″ SATA HDD
  • 2.5″ SATA SSD
  • 3.5″ SATA HDD
  • 2.5″ SATA SSD
  • 3.5″ SATA HDD
  • 2.5″ SATA SSD
Ports and Connections
Hot Swappable Drive YES YES YES
RJ-45 1GbE LAN Port 4 (with Link Aggregation / Failover support) 4 (with Link Aggregation / Failover support) 4 (with Link Aggregation / Failover support)
RJ-45 10GbE LAN Port NO 2 (with Link Aggregation / Failover support) 2 (with Link Aggregation / Failover support)
USB 3.2 Gen 1 Port 2 2 2
Expansion Port 2 2 2
PCIe Expansion 2 x Gen3 x8 slots (x8 link) 2 x Gen3 x8 slots (x8 link) 2 x Gen3 x8 slots (x8 link)
Internal Drives
  • Btrfs
  • EXT4
  • Btrfs
  • EXT4
  • Btrfs
  • EXT4
Form Factor (RU) 2U 2U 3U
Size (Height x Width x Depth) 88 mm x 482 mm x 724 mm 88 mm x 482 mm x 724 mm 132.3 mm x 482 mm x 656.5 mm
Weight 14.5 kg 14.5 kg 17.4 kg
Rack Installation Support* 4-post 19″ rack (Synology Rail Kit – RKS1317) 4-post 19″ rack (Synology Rail Kit – RKS1317) 4-post 19″ rack (Synology Rail Kit – RKS1317)
Notes The rail kit is sold separately The rail kit is sold separately The rail kit is sold separately
System Fan 80 mm x 80 mm x 4 pcs 80 mm x 80 mm x 4 pcs 80 mm x 80 mm x 3 pcs
Noise Level* 50.2 dB(A) 50.2 dB(A) 44.7 dB(A)
Scheduled Power On / Off YES YES YES
Wake on LAN / WAN YES YES YES
Power Supply Unit / Adapter 500 W 500 W 800 W
Redundant Power Supply YES YES YES
Power Consumption* 140.01 W (Access)
65.94 W (HDD Hibernation)
142.5 W (Access)
72.76 W (HDD Hibernation)
145.79 W (Access)
62.68 W (HDD Hibernation)
Warranty 5 Years 5 Years 5 Years

 

What Are the Software Specifications of theRS3621xs+, RS3621RPxs and RS4021xs+ NAS?

The software performance of the Synology RS3621xs+ and RS4021xs+ are (on the whole) greater than that of the RS3621RPxs, largely thanks to the increased available hardware inside, improved external connectivity with 10Gbe and/or the larger available storage. That said, none of the three systems is exactly taking it easy and all provide easily the best performance and depth of ability of ANY Synolgoy NAS I have seen for a long time. Aside from the hardware featured in one of two or the Flash or SAS based systems in the rackstation portfolio, these three rackmount NAS in the Synology 2021 range are pretty incredible. Here is a breakdown of what they can do in both 1st party and 3rd party applications:


Synology DSM 6.2 (7.0 in late Summer 2021) Support
Storage Management
Synology Model ID Synology RS3621RPxs

Synology RS3621xs+

Synology RS4021xs+

Maximum Internal Volume Number 128 256 256
SSD Read / Write Cache (White Paper) YES YES YES
SSD TRIM YES YES YES
RAID Group YES YES YES
Supported RAID Type
  • RAID F1
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
  • RAID F1
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
  • RAID F1
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
File Services
File Protocol CIFS/AFP/NFS/FTP/WebDAV CIFS/AFP/NFS/FTP/WebDAV CIFS/AFP/NFS/FTP/WebDAV
Maximum Concurrent CIFS/AFP/FTP Connections 2,000 2,000 4,000
Maximum Concurrent CIFS/AFP/FTP Connections (with RAM expansion) 10,000 10,000 10,000
Windows Access Control List (ACL) Integration YES YES YES
NFS Kerberos Authentication YES YES YES
Account & Shared Folder
Maximum Local User Accounts 16,000 16,000 16,000
Maximum Local Groups 512 512 512
Maximum Shared Folder 512 512 512
Maximum Shared Folder Sync Tasks 32 32 32
High Availability
Synology High Availability YES YES YES
Log Center YES YES YES
Syslog Events per Second 3,000 3,000 3,000
Virtualization
VMware vSphere with VAAI YES YES YES
Windows Server 2016 YES YES YES
Windows Server 2019 YES YES YES
Citrix Ready YES YES YES
OpenStack YES YES YES
General Specifications

 


Additional Application Support (1st/3rd Party)
 
Synology Model ID

Synology RS3621RPxs

Synology RS3621xs+

Synology RS4021xs+

Antivirus by McAfee (Trial) YES YES YES
Central Management System YES YES YES
Synology Chat YES YES YES
Maximum Users 4,000 6,000 6,000
Maximum Concurrent Download Tasks 80 80 80
exFAT Access (Optional) YES YES YES
iSCSI Manager
Maximum iSCSI Target Number 256 256 256
Maximum iSCSI LUN 512 512 512
iSCSI LUN Clone/Snapshot, Windows ODX YES YES YES
Synology MailPlus / MailPlus Server YES YES YES
Free Email Accounts 5 (Licenses required for additional accounts) 5 (Licenses required for additional accounts) 5 (Licenses required for additional accounts)
Maximum Number of Concurrent Users 800 800 1,100
Maximum Server Performance 4,235,000 emails per day, approx. 129GB 4,235,000 emails per day, approx. 129GB 4,312,000 emails per day, approx. 131GB
Media Server YES YES YES
DLNA Compliance YES YES YES
Moments YES YES YES
Facial Recognition YES YES YES
Subject Recognition YES YES YES
Auto Color & Rotate YES YES YES
Moments Select YES YES YES
Snapshot Replication YES YES YES
Maximum Snapshots per Shared Folder 1,024 1,024 1,024
Maximum of System Snapshots 65,536 65,536 65,536
Surveillance Station YES YES YES
Maximum IP cam (Licenses required) 75 (including 2 Free License) (See All Supported IP Cameras) 90 (including 2 Free License) (See All Supported IP Cameras) 90 (including 2 Free License) (See All Supported IP Cameras)
Total FPS (H.264) 2250 FPS @ 720p (1280×720)
2100 FPS @ 1080p (1920×1080)
1500 FPS @ 3M (2048×1536)
900 FPS @ 5M (2591×1944)
550 FPS @ 4K (3840×2160)
2700 FPS @ 720p (1280×720)
2250 FPS @ 1080p (1920×1080)
1500 FPS @ 3M (2048×1536)
900 FPS @ 5M (2591×1944)
550 FPS @ 4K (3840×2160)
2700 FPS @ 720p (1280×720)
2250 FPS @ 1080p (1920×1080)
1500 FPS @ 3M (2048×1536)
900 FPS @ 5M (2591×1944)
550 FPS @ 4K (3840×2160)
Total FPS (H.265) 2250 FPS @ 720p (1280×720)
2250 FPS @ 1080p (1920×1080)
2250 FPS @ 3M (2048×1536)
1500 FPS @ 5M (2591×1944)
900 FPS @ 4K (3840×2160)
2700 FPS @ 720p (1280×720)
2700 FPS @ 1080p (1920×1080)
2250 FPS @ 3M (2048×1536)
1500 FPS @ 5M (2591×1944)
1080 FPS @ 4K (3840×2160)
2700 FPS @ 720p (1280×720)
2700 FPS @ 1080p (1920×1080)
2250 FPS @ 3M (2048×1536)
1500 FPS @ 5M (2591×1944)
1080 FPS @ 4K (3840×2160)
Synology Drive YES YES YES
Recommended Number of Hosted Files 3,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above) 5,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above) 5,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
Recommended Number of Concurrent Sync Clients 1,800 (the number of connections that can be maintained when the recommended number of hosted files was reached) 2,000 (the number of connections that can be maintained when the recommended number of hosted files was reached) 2,000 (the number of connections that can be maintained when the recommended number of hosted files was reached)
Synology Office YES YES YES
Maximum Users 3,000 3,000 3,000
Video Station YES YES YES
Virtual Machine Manager YES YES YES
Recommended Virtual Machine Instances 12 (Learn more) 16 (Learn more) 16 (Learn more)
Recommended Virtual DSM Number (Licenses required) 12 (including 1 Free License) 16 (including 1 Free License) 16 (including 1 Free License)
Notes The specifications vary depending on system configuration and memory size. The specifications vary depending on system configuration and memory size. The specifications vary depending on system configuration and memory size.
VPN Server YES YES YES
Maximum Connections 40 40 40

 

When will the Synology RS3621xs+, RS362RP1xs and RS4021xs+ NAS Be Released and How Much?

Even a casual google of these three Synology rackstation solutions will show you that prices and a release window have been stated online and, now that Synology has published these items on their respective worldwide websites, that means that these three systems are effectively available NOW. So, to confirm, multiple sites have listed the price at the Synology RS3621RPXS – € 3,317.50 (TBC*), the Synology RS3621XSP – € 4,144.00 (TBC*) and the Synology RS4021XSP – € 5,177.50 (TBC*). Other prices shown online have differed higher and lower, which only again shows that you should WAIT till more official sources move forward on pricing and release. No doubt distribution feeds will iron out these pries into something much more concrete. So, it is probably best to hold off doing anything proactive with your budget, or if you are in a pinch, the RS3617RPxs/xs+ and RS4017xs+ are still fantastically viable solutions. Stay tuned!

 

*To Be Confirmed, also may not factor in tax, logistics or any % added between suppliers and resellers in individual regions

 

 

One thought on “Synology RS3621XS+, RS4021XS+ and RS3621RPxs Specifications Revealed

  1. Now that the RS versions have been released, has there been any word from Synology on updates to the DS3617? I’d love to be able to get an RS3621, but my enclosure just isn’t deep enough, but I do have space to just rest a DS on the bottom. I’ve been waiting to upgrade my old DS410 for a while now, and if I’m going to make the investment, I want the newest to last the longest.

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