The ST550 (2019) is a enterprise server with extensive upgrade potential. This guide covers RAM, storage, and compatibility details. For more Lenovo server guides, visit our Lenovo Servers category.
ST550 Specifications
| Component | Specification |
|---|---|
| Processor | Intel Xeon Scalable 1st/2nd Gen (Skylake-SP/Cascade Lake) |
| Chipset | Intel C624 |
| RAM Type | DDR4-2933 ECC RDIMM / LRDIMM |
| RAM Slots | 24 DIMM slots (12 per CPU) |
| Max RAM | 3 TB (24x 128GB LRDIMM) |
| Storage | NVMe / SAS / SATA hot-swap, up to 20x SFF or 8x LFF bays, ThinkSystem RAID 930-8i controller |
| Form Factor | Tower (4U) |
| Release Year | 2019 |
ST550 RAM Upgrade Guide
The ST550 supports DDR4-2933 ECC RDIMM / LRDIMM across 24 DIMM slots (12 per CPU), for a maximum of 3 TB (24x 128GB LRDIMM). This system requires ECC (Error-Correcting Code) memory for data integrity in mission-critical workloads.
Compatible RAM
- Kingston Server Premier ECC — Enterprise-grade ECC memory with proven server compatibility.
- Samsung ECC RDIMM — OEM-quality registered ECC modules used in data centres worldwide.
- Crucial ECC UDIMM/RDIMM — Reliable ECC memory with excellent compatibility across server platforms.
ST550 Storage Upgrade Guide
The ST550 supports NVMe / SAS / SATA hot-swap, up to 20x SFF or 8x LFF bays, ThinkSystem RAID 930-8i controller. Dual-CPU tower with extensive drive bay options. Supports GPU accelerators.
Recommended Storage
- Samsung 990 Pro NVMe — Flagship NVMe with exceptional speed and endurance for workstation use.
- WD Red Pro / WD Black SN850X — High-reliability drives suited for server and workstation environments.
- Samsung 870 EVO SATA SSD — Reliable SATA SSD with excellent endurance for server boot drives.
- Seagate IronWolf / WD Red Plus — NAS-grade HDDs rated for 24/7 operation in server environments.
Upgrade Notes
Dual CPU config unlocks all 24 DIMM slots. Use matched pairs across channels.
Frequently Asked Questions
What type of RAM does the ST550 use?
The ST550 uses DDR4-2933 ECC RDIMM / LRDIMM across 24 DIMM slots (12 per CPU), supporting up to 3 TB (24x 128GB LRDIMM).
Can I mix RAM sizes in the ST550?
While technically possible, mixing RAM sizes is not recommended for servers. Use matched pairs or sets for optimal performance and stability.
What storage options does the ST550 support?
The ST550 supports NVMe / SAS / SATA hot-swap, up to 20x SFF or 8x LFF bays, ThinkSystem RAID 930-8i controller.
Is ECC RAM required for the ST550?
Yes, the ST550 requires ECC memory for reliable operation. Non-ECC modules will not be recognised.
Recommended Products
All links go to Amazon UK where you can check current prices and availability.
| Product | Why We Recommend It | Amazon UK |
|---|---|---|
| Kingston Server Premier ECC | Enterprise-grade ECC memory. | View on Amazon UK |
| Samsung ECC RDIMM | OEM-quality registered modules. | View on Amazon UK |
| Crucial ECC Memory | Reliable ECC with wide compatibility. | View on Amazon UK |
| Samsung 990 Pro NVMe | Flagship NVMe for workstation use. | View on Amazon UK |
| Samsung 870 EVO SATA SSD | Reliable SATA SSD for boot drives. | View on Amazon UK |
Prices and availability may vary. As an Amazon Associate, we earn from qualifying purchases.
Related Lenovo Upgrade Guides
- Lenovo ThinkStation P360 Tower
- Lenovo ThinkStation P8
- Lenovo ThinkStation P5
- Lenovo ThinkStation PX
- Lenovo ThinkStation P920
- Lenovo Upgrade Guide
Not sure what fits? Use our free Compatibility Checker covering 3,195+ models.
