QNAP TS-653A - TS-251 Series, TS-251 A Series, TS-451 Series, TS-451 S Specifications

20
System TS-251C
TS-251/
TS-251-4G
TS-251A-2G /
TS-251A-4G
CPU
Dual-core
Intel
®
Celeron™
2.41GHz (up to
2.58GHz)
Dual-core
Intel
®
Celeron™
2.41GHz (up to
2.58GHz)
Dual-core
Intel
®
Celeron™
1.6GHz (up to
2.48GHz)
Memory
1GB DDR3L 1GB / 4GB DDR3L
(Expandable RAM, up
to 8GB)
2GB / 4GB DDR3L
(Expandable RAM, up
to 8GB)
Flash
512MB
512MB 512MB
Memory
replaceable
-
✔ (Compatible with
DDR3L RAM)
✔ (Compatible with
DDR3L-1600 RAM)
Number of RAM
slots
- 2(SODIMM) 2(SODIMM)
Number of hard
drive slots
2 (3.5” HDDs only) 2 2
IR sensor
✔(QNAP remote
control: RM-IR002)
✔(QNAP remote
control: RM-IR002)
✔(QNAP remote
control: RM-IR002)
System
TS-451 /
TS-451-4G
TS-451A-2G /
TS-451A-4G
TS-451S
CPU
Dual-core
Intel
®
Celeron™
2.41GHz (up to
2.58GHz)
Dual-core
Intel
®
Celeron™
1.6GHz (up to
2.48GHz)
Dual-core
Intel
®
Celeron™
2.41GHz (up to
2.58GHz)
Memory
1GB / 4GB DDR3L
(Expandable RAM, up
to 8GB)
2GB / 4GB DDR3L
(Expandable RAM, up
to 8GB)
1GB DDR3L
(Expandable RAM, up
to 8GB)
Flash 512MB 512MB 512MB
Memory
replaceable
✔ (Compatible with
DDR3L RAM)
✔ (Compatible with
DDR3L-1600 RAM)
✔ (Compatible with
DDR3L RAM)
Number of RAM
slots
2 (SODIMM) 2(SODIMM) 2 (SODIMM)
Number of hard
drive slots
4 2 4 (2.5” only)
IR sensor
✔ (QNAP remote
control: RM-IR002)
✔(QNAP remote
control: RM-IR002)
✔ (QNAP remote
control: RM-IR002)