QNAP TS-431+ - TS-451, TS-651, TS-851 CPU;Memory Details

17
System
TS-451 /
TS-451-4G
TS-451S
CPU
Dual-core Intel
®
Celeron™ 2.41GHz
(up to 2.58GHz)
Dual-core Intel
®
Celeron™ 2.41GHz
(up to 2.58GHz)
Memory
1GB / 4GB DDR3L
(Expandable RAM, up
to 8GB)
1GB DDR3L
(Expandable RAM, up
to 8GB)
Flash
512MB
512MB
Memory
replaceable
✔ (Compatible with
DDR3L RAM)
✔ (Compatible with
DDR3L RAM)
Number of RAM
slots
2 (SODIMM)
2 (SODIMM)
Number of hard
drive slots
4
4 (2.5” only)
IR sensor
✔ (QNAP remote
control: RM-IR002)
✔ (QNAP remote
control: RM-IR002)
System
TS-651 /
TS-651-4G
TS-851 /
TS-851-4G
CPU
Dual-core Intel
®
Celeron™ 2.41GHz
(up to 2.58GHz)
Dual-core Intel
®
Celeron™ 2.41GHz
(up to 2.58GHz)
Memory
1GB / 4GB DDR3L
(Expandable RAM, up
to 8GB)
1GB / 4GB DDR3L
(Expandable RAM, up
to 8GB)
Flash
512MB
512MB
Memory
replaceable
✔ (Compatible with
DDR3L RAM)
✔ (Compatible with
DDR3L RAM)
Number of RAM
slots
2 (SODIMM)
2 (SODIMM)
Number of hard
drive slots
6
8
IR sensor
✔ (QNAP remote
control: RM-IR002)
✔ (QNAP remote
control: RM-IR002)