- Internet & Connectivity
How to Optimise Your Network for Microsoft 365
18 Mar, 2026
£477.37 inc. VAT
AI-generated summary
At ~£399.44 ex-VAT for an 8GB DDR4 SO-DIMM, this feels priced like a “replacement part” rather than a value upgrade. I don’t doubt it’ll work reliably in the specific Synology models listed, but that price per GB is the real problem: for most businesses, you’d usually get much better budget impact by upgrading other bottlenecks first (storage throughput, network, or even simply adding capacity with the right disks) unless you’ve been explicitly blocked by memory limits. If you’re running heavier workloads—VMs, lots of concurrent users/requests, aggressive indexing, or memory-hungry apps—then paying for the correct, compatible module can be justified to avoid slowdowns.
Who should buy: admins maintaining DS/RS units like the DS1621+/DS1821+ and RS1221-series who need guaranteed compatibility and minimal downtime. It’s especially sensible if you’re replacing a failed stick or keeping a mission-critical NAS stable. Who should think twice: anyone looking to “spray and pray” memory upgrades, or anyone just trying to save a bit of performance—because for this money, you can often hit the same or better outcome by moving to a more cost-effective configuration elsewhere (or sourcing compatible RAM at a saner price, if the model allows alternatives). If you tell me your current RAM setup and what you’re running on the NAS, I can give a clearer “worth it vs not” call.

Lenovo
Lenovo TruDDR4 - DDR4 - module - 64 GB - DIMM 288-pin - 3200 MT/s / PC4-25600 - 1.2 V - registered - ECC - for ThinkAgile MX3330-F Appliance, MX3330-H Appliance, MX3331-F Certified Node

Kingston
Kingston - DDR5 - module - 64 GB - DIMM 288-pin - 5600 MHz / PC5-44800 - CL46 - 1.1 V - registered - ECC

Kingston
Kingston FURY Beast - DDR4 - kit - 64 GB: 2 x 32 GB - DIMM 288-pin - 3600 MHz / PC4-28800 - CL18 - 1.35 V - unbuffered - non-ECC - black

Kingston
Kingston - DDR4 - module - 64 GB - DIMM 288-pin - 3200 MT/s / PC4-25600 - CL22 - 1.2 V - registered - ECC