Designed for their DiskStation DS1621+, the 4GB DDR4 SO-DIMM ECC Memory Module from Synology provides 4GB of DDR4 ECC memory. This memory has a 260-pin SO-DIMM form factor and is unbuffered, or not registered.
UPC: 846504004034
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Key Features
- Designed for the DiskStation DS1621+
- 4GB (1 x 4GB) Capacity
- 260-Pin SO-DIMM
- ECC, Unbuffered
Designed for their DiskStation DS1621+, the 4GB DDR4 SO-DIMM ECC Memory Module from Synology provides 4GB of DDR4 ECC memory. This memory has a 260-pin SO-DIMM form factor and is unbuffered, or not registered.
Temporarily Out of Stock
Synology DDR4 SO-DIMM ECC Overview
Synology DDR4 SO-DIMM ECC Specs
Key Specs
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| Memory Type |
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| Capacity | |
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| DIMM Type | |
| Buffered/Registered | |
| Error Correction (ECC) |
Packaging Info
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Synology DDR4 SO-DIMM ECC Reviews
love it
By maya
Rated 5 out of 5
Date: 2026-07-04
helps with speet!
Perfect fit & fast delivery
By James
Rated 5 out of 5
Date: 2025-12-15
New Synology DS925+ came with 4GB and an open slot. B&H made it easy to order correct module for a good price. Order was fulfilled quickly and part arrived promptly. Powered down, pulled drives for access, new module clicked into place, reinserted drives and powered up. Now I have 8GB of memory that will meet my needs for the foreseeable future.
See any errors on this page?
Is the RAM DDR4 ECC Unbuffered SODIMM 16GB ...
Is the RAM DDR4 ECC Unbuffered SODIMM 16GB (D4ES01-16G) compatible with the DS1522+ ?
yes
Date published: 2024-12-18
Is the RAM DDR4 ECC Unbuffered SODIMM 16GB ...
Is the RAM DDR4 ECC Unbuffered SODIMM 16GB (D4ES01-16G) compatible with the DS923+?
yes
Date published: 2024-12-20
Is this ram compatible with RS822RP+?
Is this ram compatible with RS822RP+?
Yes, the Synology 16GB DDR4 SO-DIMM ECC Memory Module is compatible with the Synology RS822RP+ 4-Bay NAS, B&H # SYRS822RP.
Date published: 2023-08-08
Is this RAM compatible with DS1621xs+?
Is this RAM compatible with DS1621xs+?
Synology 16GB DDR4 SO-DIMM ECC Memory Module is not compatible with Synology DiskStation DS1621xs+.
Date published: 2024-12-26
Is this module also compatible with the 1525+, or ...
Is this module also compatible with the 1525+, or is there a different one for the 1525+? If different, can you point me to it?
Yes, the Synology 16GB DDR4 SO-DIMM ECC Memory Module is compatible with the Synology DiskStation DS1525+.
Date published: 2025-12-08
Is the 16GB DDR4 SO-DIMM ECC Memory Module from ...
Is the 16GB DDR4 SO-DIMM ECC Memory Module from Synology compatable with the DS925+?
No, the Synology 16GB DDR4 SO-DIMM ECC Memory Module BH # SYD4ES0116G is not compatible with the DS925+. For the DS925+, the correct RAM module for it will be the Synology 16GB DDR4 SO-DIMM ECC Memory Module BH # SYD4ES0316G.
Date published: 2025-09-07
What's the speed of this DDR4 module, such as ...
What's the speed of this DDR4 module, such as 2666 or 3200? what's its CL value?
This RAM is offered as model specific upgrade. The manufacturer does not list specs for it.
Date published: 2022-06-01
Is this compatible with the DS1522?
Is this compatible with the DS1522?
Yes, the Synology 8GB DDR4 SO-DIMM ECC Memory Module (BH #SYD4ES028G), is compatible with the Synology DiskStation DS1522+ 5-Bay NAS Enclosure.
Date published: 2024-04-01