QNAP TS-879U-RP - TS-251+ Variants Specifications; TS-253 Pro Variants Specifications; TS-453 Bmini Variants Specifications; TS-453 mini Variants Specifications

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System
TS-251+-2G /
TS-251+-8G
TS-253 Pro /
TS-253 Pro-8G
CPU
Quad-core
Intel
®
Celeron™
2.0GHz (up to
2.42GHz)
Quad-core
Intel
®
Celeron™
2.0GHz (up to
2.42GHz)
Memory
2GB / 8GB DDR3L
(Expandable RAM, up
to 8GB)
2GB / 8GB DDR3L
(Expandable RAM, up
to 8GB)
Flash 512MB 512MB
Memory
replaceable
✔ (Compatible with
DDR3L-1333/1600
RAM)
✔ (Compatible with
DDR3L-1333/1600
RAM)
Number of RAM
slots
2(SODIMM) 2(SODIMM)
Number of hard
drive slots
2 2
IR sensor
✔ (QNAP remote
control: RM-IR002)
✔ (QNAP remote
control: RM-IR002)
System
TS-453Bmini-4G /
TS-453Bmini-8G
TS-453mini-2G /
TS-453mini-8G
CPU
Quad-core Intel
®
Celeron™ J3455 1.5 GHz
(up to 2.3 GHz)
Quad-core Intel
®
Celeron™ J1900 2.0GHz
(up to 2.42GHz)
Memory
4GB / 8GB DDR3L
(Expandable RAM, up
to 8GB)
2GB / 8GB DDR3L
(Expandable RAM, up
to 8GB)
Flash 512MB 512MB
Memory
replaceable
✔ (Compatible with
DDR3L RAM)
✔ (Compatible with
DDR3L-1333/1600
RAM)
Number of RAM
slots
2 (SODIMM) 2 (SODIMM)
Number of hard
drive slots
4 4
IR sensor
✔ (QNAP remote
✔ (QNAP remote