Synology DiskStation DS3615xs vs. Synology DiskStation DS220j + 9

Synology DiskStation DS3615xs

Synology DiskStation DS3615xs

$5,712.51

Free shipping
Synology DiskStation DS220j

Synology DiskStation DS220j

$322.18

$335.67 incl. shipping
Synology DiskStation DS920+

Synology DiskStation DS920+

$1,136.53

$1,162.88 incl. shipping
Synology DiskStation DS220+

Synology DiskStation DS220+

$686.84

$700.76 incl. shipping
QNAP TS-653D-4G

QNAP TS-653D-4G

$1,258.21

Free shipping
WD My Cloud EX2 Ultra

WD My Cloud EX2 Ultra

3.8

$296.63

$309.29 incl. shipping
Synology DiskStation DS418

Synology DiskStation DS418

$779.38

$795.19 incl. shipping
QNAP TS-230

QNAP TS-230

$335.00

$338.86 incl. shipping
Synology DiskStation DS120j

Synology DiskStation DS120j

$229.00

$240.47 incl. shipping
WD My Cloud Home 2TB

WD My Cloud Home 2TB

$259.95

$296.77 incl. shipping
Synology DiskStation DS1520+

Synology DiskStation DS1520+

$1,498.99

$1,506.05 incl. shipping
Noise level
27.4 dB
18.2 dB
19.8 dB
20.9 dB
20.8 dB
Client services
BitTorrent
BitTorrent
BitTorrent
BitTorrent
BitTorrent
Ethernet connection
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Number of Ethernet ports (RJ-45)
4 ​
1 ​
2 ​
2 ​
1 ​
2 ​
1 ​
1 ​
4 ​
Number of SFP+ ports
0 ​
0 ​
0 ​
0 ​
Speed
10/100/1000 (Gigabit) Mbit/s
10/100/1000 (Gigabit) Mbit/s
10/100/1000 (Gigabit) Mbit/s
10/100/1000 (Gigabit) Mbit/s
10/100/1000 (Gigabit) Mbit/s
10/100/1000 (Gigabit) Mbit/s
10/100/1000 (Gigabit) Mbit/s
10/100/1000 (Gigabit) Mbit/s
10/100/1000 (Gigabit) Mbit/s
10/100/1000 (Gigabit) Mbit/s
10/100/1000 (Gigabit) Mbit/s
Server services/protocols
FTP, NFS, AFP, CIFS/SMB, HTTP, iSCSI, SFTP
FTP, NFS, AFP, CIFS/SMB, iSCSI
FTP, NFS, AFP, CIFS/SMB, HTTP, iSCSI, SFTP
FTP, NFS, AFP, CIFS/SMB, iSCSI
FTP, NFS, AFP, CIFS/SMB, HTTP, iSCSI, SFTP
FTP, NFS, AFP, CIFS/SMB, HTTP, iSCSI, SFTP
FTP, NFS, AFP, CIFS/SMB, HTTP, iSCSI
FTP, NFS, AFP, CIFS/SMB, HTTP, iSCSI
FTP, NFS, AFP, CIFS/SMB, HTTP, iSCSI
iSCSI
Wireless network (Wi-Fi)
No
No
No
No
No
No
No
No
ActiveDirectory
Yes
Yes
Yes
Yes
No
ECC
No
No
Fully supported file system (external)
HFS+, NTFS, FAT32, ext4, ext3
HFS+, NTFS, FAT32, ext4, ext3, BTRFS
HFS+, NTFS, FAT32, ext4, ext3, ext2
HFS+, NTFS, FAT32, ext4, ext3, BTRFS
HFS+, NTFS, FAT32, ext4, ext3, BTRFS
Fully supported file system (internal)
ext4
ext4
ext4, BTRFS
ext4
ext4, BTRFS
ext4, BTRFS
x86-compatible processor
Yes
Yes
Yes
Yes
No
No
No
Yes
Yes
IDE/PATA
No
No
No
No
No
SAS
No
No
No
No
SATA (Serial ATA)
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
SATA interface
S-ATA/600
S-ATA/600
S-ATA/600
S-ATA/600
S-ATA/600
S-ATA/600
S-ATA/600
S-ATA/600
S-ATA/600
S-ATA/600
SCSI
No
Yes
No
No
No
eSATA
No
No
Yes
No
No
No
No
Yes
Firewire
No
No
No
No
No
No
No
No
HDMI
No
No
No
No
Yes
No
No
No
No
Number of HDMI outputs
1 ​
Optical fiber
No
No
No
No
No
No
No
No
Thunderbolt
No
No
No
No
No
No
No
USB
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
USB (total)
2 ​
2 ​
2 ​
1 ​
2 ​
USB 2.0
0 ​
3 ​
0 ​
0 ​
1 ​
2 ​
0 ​
USB 3 Gen 1 (5Gbps)
2 ​
2 ​
2 ​
2 ​
3 ​
2 ​
2 ​
2 ​
2 ​
1 ​
2 ​
USB 3 Gen 2 (10Gbps)
0 ​
0 ​
0 ​
USB 3 Gen 2x2 (20Gbps)
0 ​
0 ​
0 ​
0 ​
Dimensions (WxHxD)
Depth
270 mm
223 mm
154.94 mm
223 mm
140 mm
223 mm
Height
340 mm
165 mm
199 mm
165 mm
168 mm
171.45 mm
166 mm
188.64 mm
166 mm
175.5 mm
166 mm
Width
300 mm
100 mm
166 mm
108 mm
235 mm
99.06 mm
199 mm
90.18 mm
71 mm
53 mm
230 mm
Product weight
9800 g
880 g
2240 g
1300 g
2870 g
800 g
2280 g
1110 g
700 g
960 g
2260 g
Designed for rack mounting
No
No
No
No
No
No
No
No
Features
DLNA, Supports Hot-swap
DLNA, Supports Hot-swap
DLNA, Supports Hot-swap
DLNA, Supports Hot-swap
Cooling
Active
Active
Active
Active
Active
Active
Passive
Active
RAID
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Type of RAID
RAID 0, RAID 1, RAID 5, RAID 10, JBOD, RAID 6
RAID 0, RAID 1, JBOD
RAID 0, RAID 1, RAID 5, JBOD, RAID 6
RAID 0, RAID 1, JBOD
RAID 0, RAID 1, JBOD
RAID 0, RAID 1, JBOD
RAID 0, RAID 1, RAID 5, RAID 10, JBOD, RAID 6
RAID 0, RAID 1, JBOD
RAID 0, RAID 1, RAID 5, RAID 10, JBOD, RAID 6
Wake on LAN
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
RAM
4000 MB
512 MB
4096 MB
2048 MB
4096 MB
1024 MB
2048 MB
2048 MB
512 MB
1024 MB
8192 MB
Operational Power Consumption (min-max)
500 W
12.46 W
9.69 - 32.17 W
14.69 W
35.44 W
14.1 W
26.49 W
12.28 W
15.51 - 36.67 W
Power consumption (standby)
43.54 W
5.06 W
4.22 W
8.78 W
15.51 W
Processor core type
2 (Dual) Core
4 (Quad) Core
4 (Quad) Core
2 (Dual) Core
2 (Dual) Core
2 (Dual) Core
4 (Quad) Core
4 (Quad) Core
2 (Dual) Core
4 (Quad) Core
4 (Quad) Core
Processor model
Intel Core i3 4130
Realtek RTD1296
Intel Celeron J4125
Intel Celeron J4025
Intel Celeron 2.0GHz
Marvell Armada 385 88F6820
Realtek RTD1296
Intel Celeron J4125
Processor speed
3.4 GHz
1.4 GHz
2 GHz
2 GHz
2 GHz
1.3 GHz
1.4 GHz
1.4 GHz
1.4 GHz
1.4 GHz
2 GHz
Operating system
DiskStation Manager (DSM)
DiskStation Manager (DSM)
DiskStation Manager (DSM)
DiskStation Manager (DSM)
QNAP Turbo NAS System
DiskStation Manager (DSM)
DiskStation Manager (DSM)
Built-in hard drive
No
No
No
No
No
No
No
No
No
Yes
No
Quantity
1 ​
Storage capacity
2 TB
Price/TB
130 $/TB
Form factor
3.5 inch, 2.5 inch
3.5 inch, 2.5 inch
3.5 inch, 2.5 inch
3.5 inch, 2.5 inch
3.5 inch, 2.5 inch
3.5 inch, 2.5 inch
3.5 inch, 2.5 inch
3.5 inch, 2.5 inch
3.5 inch, 2.5 inch
3.5 inch, 2.5 inch
3.5 inch, 2.5 inch
Internal transfer rate
112 MB/s
Number of hard drive slots
12 ​
2 ​
4 ​
2 ​
6 ​
2 ​
4 ​
2 ​
1 ​
1 ​
5 ​