Updated 3 hours ago · Specifications verified October 12, 2026

Upgrade the Memory in the Synology DS723+

2GB fitted, 32GB limit, DDR4 ECC SO-DIMM

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Quick answer

The DS723+ takes DDR4 ECC SO-DIMM memory, to a limit of 32GB. It ships with 2GB fitted. Synology's datasheet gives no slot count; it lists the D4ES02-4G, D4ES02-8G and D4ES01-16G modules.

As of October 12, 2026

Memory limit

32GB

In-stock listings in the tables on this page

Prices updated

3 hours ago

Memory facts for the DS723+

	DS723+
Fitted	2 GB DDR4 ECC SODIMM (expandable up to 32 GB)
Slots	Not published
Limit	32 GB
Module type	DDR4 ECC SO-DIMM
Largest module	16GB
Processor	AMD Ryzen R1600, dual core / 4 threads (boost to 3.1 GHz)

Modules Synology lists for the DS723+

Module	Size	Type
D4ES02-4G	4GB	DDR4 ECC SO-DIMM
D4ES02-8G	8GB	DDR4 ECC SO-DIMM
D4ES01-16G	16GB	DDR4 ECC SO-DIMM

Synology's memory rules for the DS723+

DDR4 ECC SO-DIMM; the datasheet lists Synology's own modules.

The DS723+ ships with ECC memory and the modules Synology lists are ECC.

Where the DS723+ figures come from

Fitted memory, slot count, limit and module rules. Synology's DS723+ pages, October 12, 2026.

Checked on October 12, 2026. Sources: Synology DS723+ datasheet; Synology Products Compatibility List: DS723+, HDD/SSD via internal slot; Synology Products Compatibility List: DS723+, M.2 SSD via internal slot.

Go deeper

Only DS723+ memory is on this page.

What else fits the DS723+

DDR4 ECC SO-DIMM modules up to 16GB, by price

Modules of the type and size the DS723+ takes, no larger than 16GB each. A type and size filter: not a list of modules Synology has tested.

Price per

Sort

98 products

Product	Capacity	Price	$ / TB	Type	Prime	Buy
OWC 8GB Memory RAM Compatible with Synology DiskStation DS723+ DS923+	8 GB	$74.99	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
OWC 8GB Memory RAM Compatible with Synology DiskStation DS1525+ DS1825+	8 GB	$74.99	-	DDR4 SO-DIMMECC	-	Buy on Amazon
OWC 8GB DDR4 2666MHz ECC SODIMM 260-pin Memory RAM	8 GB	$74.99	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
OWC 8GB Memory RAM Compatible with Synology DiskStation DS1522+	8 GB	$74.99	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
OWC 8GB Memory RAM Replacement for Synology D4ES03-8G	8 GB	$74.99	-	DDR4 SO-DIMMECC	-	Buy on Amazon
Kingston ValueRAM 8GB 2400MHz DDR4 ECC CL17 SODIMM 1Rx8 Laptop Memory (KVR24SE17S8/8)	8 GB	$99.00	-	DDR4 SO-DIMM 2400MHzECC	-	Buy on Amazon
NEMIX RAM 8GB (1X8GB) DDR4 2666MHz PC4-21300 1Rx8 1.2V CL19 260-PIN ECC SODIMM Compatible with Synology Rackstation RS822RP+ NAS	8 GB	$99.99	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
NEMIX RAM 8GB (1X8GB) DDR4 2666MHz PC4-21300 1Rx8 1.2V CL19 260-PIN ECC SODIMM Compatible with Synology Diskstation DS923+ NAS	8 GB	$99.99	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
NEMIX RAM 8GB (1X8GB) DDR4 3200MHz PC4-25600 1Rx8 1.2V CL22 260-PIN ECC Unbuffered SODIMM Compatible with Kingston KSM32SES8/8HD, KSM32SES8/8MR	8 GB	$99.99	-	DDR4 SO-DIMM 3200MHzECC	-	Buy on Amazon
NEMIX RAM 8GB (1X8GB) DDR4 2666MHz PC4-21300 1Rx8 1.2V CL19 260-PIN ECC SODIMM Compatible with Synology D4ES01-8G NAS ECC Unbuffered Memory	8 GB	$99.99	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
NEMIX RAM 8GB (1X8GB) DDR4 2666MHz PC4-21300 1Rx8 1.2V CL19 260-PIN ECC SODIMM Compatible with Compatible with Synology DiskStation DS723+ NAS	8 GB	$99.99	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
8GB DDR4-3200 ECC SODIMM Compatible with UGREEN NASync DXP2800 GT	8 GB	$99.99	-	DDR4 SO-DIMMECC	-	Buy on Amazon
Arch Memory 8GB KSM26SES8/8HD DDR4 SODIMM ECC Replacement for Kingston RAM	8 GB	$129.95	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
Arch Memory 8GB KSM26SES8/8MR DDR4 SODIMM ECC Replacement for Kingston RAM	8 GB	$129.95	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
BytecRAM 8GB D4ES03-8G Replacement for Synology DS925+ DDR4-2666 SODIMM ECC	8 GB	$129.95	-	DDR4 SO-DIMMECC	-	Buy on Amazon
OWC 16GB Memory RAM Kit Compatible with Synology DiskStation DS723+ DS923+	16 GB	$149.83	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
OWC 16GB Memory RAM Kit Compat with Synology RackStation RS822+ RS822RP+	16 GB	$149.83	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
OWC 16GB (2x8GB) DDR4 2666MHz ECC SODIMM 260-pin Memory RAM	2 x 8 GB	$149.83	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
OWC 16GB (2x8GB) DDR4 3200MHz ECC SODIMM 260-pin Memory RAM	2 x 8 GB	$149.83	-	DDR4 SO-DIMM 3200MHzECC	-	Buy on Amazon
OWC 16GB Memory RAM Kit Compat with Synology RackStation RS1221+ RS1221RP+	16 GB	$149.83	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
NEMIX RAM 16GB (1X16GB) DDR4 2666MHz PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM Workstation, NAS Memory	16 GB	$157.26	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
NEMIX RAM 16GB (1X16GB) DDR4 2666MHz PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM NAS Memory Compatible with Synology DiskStation DS3617xsII	16 GB	$157.26	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
OWC 16GB Memory RAM Compatible with Synology DiskStation DS723+ DS923+	16 GB	$157.26	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
NEMIX RAM 16GB (1X16GB) DDR4 2666MHz PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM Compatible with Synology D4ES01-16G NAS Memory	16 GB	$157.26	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
OWC 16GB Memory Compatible with Synology DiskStation DS1525+ DS1825+ DS725+	16 GB	$157.26	-	DDR4 SO-DIMMECC	-	Buy on Amazon
OWC 16GB DDR4 3200MHz ECC SODIMM 260-pin Memory RAM	16 GB	$157.26	-	DDR4 SO-DIMM 3200MHzECC	-	Buy on Amazon
NEMIX RAM 16GB (1X16GB) DDR4 2666MHz PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM NAS Memory Compatible with QNAP RAM-16GDR4ECT0-SO-2666	16 GB	$157.26	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
16GB 1X16GB DDR4 2666MHZ PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM NEMIX RAM Compatible with Synology NAS Memory D4ES03-16G, DiskStation, RackStation, DVA	16 GB	$157.26	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
OWC 16GB Memory RAM Compatible with Synology RackStation RS822+ RS822RP+	16 GB	$157.26	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
NEMIX RAM 16GB (1X16GB) DDR4 2666MHZ PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM NAS Memory Compatible with Synology Diskstation and Rackstation NAS Device	16 GB	$157.26	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
OWC 16GB Memory RAM Replacement for QNAP RAM-16GDR4ECT0-SO-2666	16 GB	$157.26	-	DDR4 SO-DIMMECC	-	Buy on Amazon
NEMIX RAM 16GB (1X16GB) DDR4 2666MHz PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM NAS Memory Compatible with Synology DiskStation DS723+	16 GB	$157.26	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
NEMIX RAM 16GB (1X16GB) DDR4 2666MHz PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM NAS Memory Compatible with Synology Diskstation DS923+	16 GB	$157.26	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
OWC 16GB Memory RAM Replacement for Synology D4ECSO-2666-16G D4ES01-16G	16 GB	$157.26	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
NEMIX RAM 16GB (1X16GB) DDR4 2666MHz PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM Compatible with Samsung M474A2K43BB1-CTD	16 GB	$157.26	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
NEMIX RAM 16GB (1X16GB) DDR4 2666MHZ PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM Workstation, NAS Memory Compatible with Hynix HMA82GS7CJR8N-VK	16 GB	$157.26	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
OWC 16GB Memory RAM Compatible with Synology DiskStation DS1522+	16 GB	$157.26	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
NEMIX RAM 16GB (1X16GB) DDR4 2666MHz PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM NAS Memory Compatible with Synology DiskStation DS1821+	16 GB	$157.26	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
NEMIX RAM 16GB (1X16GB) DDR4 2666MHZ PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM NAS Memory Compatible with Synology RackStation RS1221+/RS1221RP+	16 GB	$157.26	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
OWC 16GB Memory RAM Replacement for Synology D4ECSO-2666-16G D4ES01-16G	16 GB	$157.26	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
16GB 1X16GB DDR4 2666MHZ PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM NEMIX RAM Compatible with Synology NAS Memory D4ES01-16G, DiskStation, RackStation	16 GB	$157.26	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
16GB 1X16GB DDR4 2666MHZ PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM NEMIX RAM Compatible with Synology D4ECSO-2666-16G FS Series NAS FS1018	16 GB	$157.26	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
16GB 1X16GB DDR4 2666MHZ PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM NEMIX RAM Compatible with Synology D4ES03-16G NAS 25 Series: DS1825+ DS1525+ DS925+ DS725+	16 GB	$157.26	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
16GB 1X16GB DDR4 2666MHz PC4-21300 2Rx8 1.2V CL19 260-PIN NEMIX RAM NAS ECC Unbuffered SODIMM Compatible with QNAP RAM-16GDR4ECT0-SO-2666	16 GB	$157.26	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
NEMIX RAM 16GB (1X16GB) DDR4 3200MHz PC4-25600 1Rx8 1.2V CL22 260-PIN ECC Unbuffered SODIMM Compatible with Kingston KSM32SES8/16HC, KSM32SES8/16MF	16 GB	$158.88	-	DDR4 SO-DIMM 3200MHzECC	-	Buy on Amazon
NEMIX RAM 16GB (1X16GB) DDR4 3200MHz PC4-25600 2Rx8 1.2V CL22 260-PIN ECC Unbuffered SODIMM Compatible with Kingston KSM32SED8/16HD, KSM32SED8/16MR	16 GB	$158.88	-	DDR4 SO-DIMM 3200MHzECC	-	Buy on Amazon
NEMIX RAM 16GB (1X16GB) DDR4 3200MHz PC4-25600 1Rx8 1.2V CL22 260-PIN ECC SODIMM Compatible with Micron MTA9ASF2G72HZ-3G2 ECC Unbuffered Memory	16 GB	$158.88	-	DDR4 SO-DIMM 3200MHzECC	-	Buy on Amazon
A-Tech 8GB RAM for Synology RackStation RS1221RP+ NAS \| DDR4 2666MHz PC4-21300 ECC SODIMM 1Rx8 1.2V 260-Pin Memory Upgrade	8 GB	$171.18	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
A-Tech 16GB RAM Replacement for Synology D4ECSO-2400-16G \| DDR4 2400MHz PC4-19200 ECC SODIMM 2Rx8 1.2V 260-Pin Memory Upgrade for NAS DiskStation, RackStation, & FlashStation	16 GB	$179.99	-	DDR4 SO-DIMM 2400MHzECC	-	Buy on Amazon
A-Tech 16GB Kit (2x8GB) RAM for QNAP TS-855eU NAS \| DDR4 2933MHz PC4-23400 ECC SODIMM 1Rx8 1.2V 260-Pin Memory Upgrade	2 x 8 GB	$191.98	-	DDR4 SO-DIMM 2933MHzECC	-	Buy on Amazon
A-Tech 16GB RAM Replacement for Synology D4ECSO-2666-16G & D4ES01-16G \| DDR4 2666 MHz PC4-21300 SODIMM ECC Unbuffered Memory Compatible for NAS & NVR Servers	16 GB	$191.99	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
A-Tech 16GB RAM for Synology DiskStation DS3622xs+ NAS \| DDR4 2666MHz PC4-21300 ECC SODIMM 2Rx8 1.2V 260-Pin Memory Upgrade	16 GB	$191.99	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
A-Tech 16GB RAM for Synology RackStation RS1221+ NAS \| DDR4 2666MHz PC4-21300 ECC SODIMM 2Rx8 1.2V 260-Pin Memory Upgrade	16 GB	$191.99	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
A-Tech 16GB RAM for Synology DiskStation DS1821+ NAS \| DDR4 2666MHz PC4-21300 ECC SODIMM 2Rx8 1.2V 260-Pin Memory Upgrade	16 GB	$191.99	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
A-Tech 16GB Memory RAM for Synology DS DS1621+ - DDR4 2666 PC4-21300 ECC SO-DIMM 2Rx8 1.2V - Single NAS Server Upgrade Module (Compatible Replacement for D4ECSO-2666-16G)	16 GB	$191.99	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
A-Tech 16GB RAM for Synology RackStation RS1221RP+ NAS \| DDR4 2666MHz PC4-21300 ECC SODIMM 2Rx8 1.2V 260-Pin Memory Upgrade	16 GB	$191.99	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
NEMIX RAM 16GB (2X8GB) DDR4 2666MHz PC4-21300 1Rx8 1.2V CL19 260-PIN ECC SODIMM KIT Compatible with Synology Rackstation RS822+ NAS	2 x 8 GB	$198.99	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
NEMIX RAM 16GB (2X8GB) DDR4 2666MHz PC4-21300 1Rx8 1.2V CL19 260-PIN ECC SODIMM KIT Compatible with Synology Rackstation DS1823xs+ NAS	2 x 8 GB	$198.99	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
NEMIX RAM 16GB (2X8GB) DDR4 2666MHz PC4-21300 1Rx8 1.2V CL19 260-PIN ECC SODIMM KIT Compatible with Synology D4ES01-8G ECC Unbuffered Memory	2 x 8 GB	$198.99	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
Arch Memory 16GB KSM26SED8/16HD DDR4-2666 ECC Replacement for Kingston RAM	16 GB	$224.95	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
Arch Memory 16GB KSM32SED8/16HD DDR4-3200 ECC Replacement for Kingston RAM	16 GB	$224.95	-	DDR4 SO-DIMM 3200MHzECC	-	Buy on Amazon
Arch Memory 16GB KSM24SED8/16ME DDR4-2400 ECC Replacement for Kingston RAM	16 GB	$224.95	-	DDR4 SO-DIMM 2400MHzECC	-	Buy on Amazon
BytecRAM 16GB KSM32SED8/16HD Replacement for Kingston DDR4-3200 SODIMM ECC	16 GB	$224.95	-	DDR4 SO-DIMMECC	-	Buy on Amazon
Arch Memory 16GB D4ECSO-2666-16G Replacement for 260-Pin DDR4 2666 MHz (PC4-2666V) 2R ECC SODIMM Memory for Synology NAS Systems	16 GB	$224.95	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
Arch Memory 16GB D4ES01-16G Replacement for 260-Pin DDR4 3200 MHz (PC4-3200AA) ECC SODIMM Memory for Synology DS923+ NAS	16 GB	$224.95	-	DDR4 SO-DIMM 3200MHzECC	-	Buy on Amazon
Arch Memory 16GB KSM26SES8/16MF DDR4-2666 ECC Replacement for Kingston RAM	16 GB	$224.95	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
BytecRAM 16GB KSM26SED8/16ME Replacement for Kingston DDR4-2666 SODIMM ECC	16 GB	$224.95	-	DDR4 SO-DIMMECC	-	Buy on Amazon
Arch Memory 16GB KSM26SED8/16ME DDR4-2666 ECC Replacement for Kingston RAM	16 GB	$224.95	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
Synology SODIMM ECC RAM DDR4 4GB (D4ES02-4G)	4 GB	$229.99	-	DDR4 SO-DIMMECC	-	Buy on Amazon
Synology SODIMM ECC RAM DDR4 4GB (D4ES01-4G)	4 GB	$248.07	-	DDR4 SO-DIMMECC	-	Buy on Amazon
NEMIX RAM 32GB (2X16GB) DDR4 2666MHZ PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM NAS Memory KIT Compatible with Synology Rackstation DS1823xs+	2 x 16 GB	$313.89	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
OWC 32GB (2x16GB) DDR4 3200MHz ECC SODIMM 260-pin Memory RAM	2 x 16 GB	$313.89	-	DDR4 SO-DIMM 3200MHzECC	-	Buy on Amazon
NEMIX RAM 32GB (2X16GB) DDR4 2666MHz PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM NAS Memory KIT Compatible with Synology DiskStation DS723+	2 x 16 GB	$313.89	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
32GB 2X16GB DDR4 2666MHZ PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM KIT NEMIX RAM Compatible with Synology NAS D4ES03-16G - 22 Series: RS822RP+ RS822+ DS3622xs+ DS2422+ DS1522+	2 x 16 GB	$313.89	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
32GB 2X16GB DDR4 2666MHZ PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM KIT NEMIX RAM Compatible with Synology D4ES01-16G, D4ES03-16G NAS 23 Series: DS1823xs+ DS923+ DS723+	2 x 16 GB	$313.89	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
32GB 2X16GB DDR4 2666MHZ PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM KIT NEMIX RAM Compatible with Synology D4ES01-16G NAS 22 Series: RS822RP+ RS822+ DS3622xs+ DS2422+ DS1522+	2 x 16 GB	$313.89	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
32GB 2X16GB DDR4 2666MHZ PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM KIT NEMIX RAM Compatible with Synology D4ES03-16G NAS 25 Series: DS1825+ DS1525+ DS925+ DS725+	2 x 16 GB	$313.89	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
NEMIX RAM 32GB (2X16GB) DDR4 2666MHz PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM KIT Workstation, NAS Memory	2 x 16 GB	$313.89	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
NEMIX RAM 32GB (2X16GB) DDR4 2666MHz PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM NAS Memory KIT Compatible with Synology D4ECSO-2666-16G	2 x 16 GB	$313.89	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
NEMIX RAM 32GB (2X16GB) DDR4 2666MHz PC4-21300 1.2V CL19 260-PIN ECC SODIMM KIT Compatible with Synology DiskStation DS1821 NAS	2 x 16 GB	$313.89	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
NEMIX RAM 32GB (2X16GB) DDR4 2666MHz PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM NAS Memory KIT Compatible with Synology Rackstation RS822+	2 x 16 GB	$313.89	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
32GB 2X16GB DDR4 2666MHZ PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM KIT NEMIX RAM Compatible with Synology NAS D4ECSO-2666-16G 21 Series RS1221RP+ RS1221+ DS1821+ DS1621xs+ DS1621+ DVA3221	2 x 16 GB	$313.89	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
NEMIX RAM 32GB (2X16GB) DDR4 3200MHz PC4-25600 2Rx8 1.2V CL22 260-PIN ECC SODIMM KIT	2 x 16 GB	$317.49	-	DDR4 SO-DIMM 3200MHzECC	-	Buy on Amazon
2X16GB DDR4-3200 ECC SODIMM Compatible with Synology RackStation RS1226RP+	2 x 16 GB	$317.49	-	DDR4 SO-DIMMECC	-	Buy on Amazon
2X16GB DDR4-3200 ECC SODIMM Compatible with Synology D4ES03-16G	2 x 16 GB	$317.49	-	DDR4 SO-DIMMECC	-	Buy on Amazon
Synology SODIMM ECC RAM DDR4 8GB (D4ES02-8G)	8 GB	$359.99	-	DDR4 SO-DIMMECC	-	Buy on Amazon
A-Tech 32GB (2x16GB) RAM Replacement for Synology D4ECSO-2666-16G, D4ES01-16G \| DDR4 2666MHz PC4-21300 ECC SODIMM 2Rx8 1.2V Memory Upgrade for NAS DiskStation, RackStation, FlashStation, & NVR DVA	2 x 16 GB	$383.98	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
A-Tech 32GB Kit (2x16GB) RAM for Synology RackStation RS822+ NAS \| DDR4 2666MHz PC4-21300 ECC SODIMM 2Rx8 1.2V 260-Pin Memory Upgrade	2 x 16 GB	$383.98	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
A-Tech 32GB Kit (2x16GB) RAM for Synology RackStation RS1221RP+ NAS \| DDR4 2666MHz PC4-21300 ECC SODIMM 2Rx8 1.2V 260-Pin Memory Upgrade	2 x 16 GB	$383.98	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
A-Tech 32GB Kit (2x16GB) RAM for Synology RackStation RS1221+ NAS \| DDR4 2666MHz PC4-21300 ECC SODIMM 2Rx8 1.2V 260-Pin Memory Upgrade	2 x 16 GB	$383.98	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
A-Tech 32GB Kit (2x16GB) RAM for Synology DiskStation DS1522+ NAS \| DDR4 2666MHz PC4-21300 ECC SODIMM 2Rx8 1.2V 260-Pin Memory Upgrade	2 x 16 GB	$383.98	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
A-Tech 32GB Kit (2x16GB) RAM for Synology RackStation RS822RP+ NAS \| DDR4 2666MHz PC4-21300 ECC SODIMM 2Rx8 1.2V 260-Pin Memory Upgrade	2 x 16 GB	$383.98	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
A-Tech 32GB Kit (2x16GB) RAM for Synology DiskStation DS1821+ NAS \| DDR4 2666MHz PC4-21300 ECC SODIMM 2Rx8 1.2V 260-Pin Memory Upgrade	2 x 16 GB	$383.98	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
A-Tech 32GB Kit (2x16GB) RAM for Synology DiskStation DS3622xs+ NAS \| DDR4 2666MHz PC4-21300 ECC SODIMM 2Rx8 1.2V 260-Pin Memory Upgrade	2 x 16 GB	$383.98	-	DDR4 SO-DIMM 2666MHzECC	-	Buy on Amazon
A-Tech 32GB Kit (2x16GB) RAM for QNAP TS-873A NAS \| DDR4 2400MHz PC4-19200 ECC SODIMM 2Rx8 1.2V 260-Pin Memory Upgrade	2 x 16 GB	$477.37	-	DDR4 SO-DIMM 2400MHzECC	-	Buy on Amazon
Synology SODIMM ECC RAM DDR4 ECC 16GB (D4ES01-16G), Black	16 GB	$819.99	-	DDR4 SO-DIMMECC	-	Buy on Amazon
Synology SODIMM ECC RAM DDR4-2666 16GB (D4ECSO-2666-16G)	16 GB	$879.01	-	DDR4 SO-DIMMECC	-	Buy on Amazon
Synology SODIMM ECC RAM DDR4 16GB (D4ES03-16G)Sold by Amazon	16 GB	$1,159.37	-	DDR4 SO-DIMMECC	Prime	Buy on Amazon

Frequently asked questions

How much RAM can the DS723+ take?

32GB. Synology writes the limit as 32 GB.

Does the DS723+ use ECC memory?

Yes: 2 GB DDR4 ECC SODIMM from the factory.

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