HPE ProLiant DL380 G7 Memory
Upgrade your HP ProLiant DL380 G7 with genuine DDR3 ECC memory — available in both new and refurbished modules, fully tested for compatibility with the Intel Xeon 5500 and 5600 series processors. Every module is guaranteed to work in your DL380 G7 for reliable, high-uptime performance.
DL380 G7 memory specifications
The ProLiant DL380 G7 has 18 DIMM slots across two processors (9 slots per CPU, 6 memory channels), and uses DDR3 ECC memory. Key specifications:
- Memory type: DDR3 ECC — Registered (RDIMM) or Unbuffered (UDIMM)
- Maximum speed: up to 1333 MT/s (PC3-10600), depending on processor and configuration
- DIMM slots: 18 total (9 per processor, 3 per channel)
- Module capacities: 2GB and 4GB UDIMM; 4GB, 8GB, 16GB, and 32GB RDIMM
- Not supported: Load-Reduced DIMMs (LRDIMM)
How much memory can the DL380 G7 hold?
The practical maximum depends on the module rank and capacity you choose:
| Configuration | Total capacity | Notes |
|---|---|---|
| 18 × 16GB dual-rank RDIMM | 288GB | Best balance of capacity and speed |
| 12 × 32GB quad-rank RDIMM | 384GB | Maximum capacity; runs at 1066 MT/s or lower (see below) |
| 18 × 4GB UDIMM | 72GB | Unbuffered ECC configuration |
For most deployments, 288GB using eighteen 16GB dual-rank RDIMMs is the sweet spot — it fills every slot while keeping memory running at a higher speed. The 384GB maximum requires quad-rank 32GB modules, which the G7 chipset clocks down (see the FAQ), so choose it only when raw capacity matters more than bandwidth.
Choosing the right DL380 G7 memory
A few rules ensure your upgrade works and performs as expected:
- Don't mix RDIMM and UDIMM. The DL380 G7 supports either Registered or Unbuffered ECC memory, but never both together.
- Match modules for best results. Use identical capacity, rank, and speed across channels; mixing speeds forces all DIMMs to run at the slowest module's speed.
- Populate channels correctly. Install into the first white slot (A1 for CPU 1, B1 for CPU 2) and fill in sequence, balancing memory across both processors.
- Remember the rank trade-off. Higher-capacity quad-rank DIMMs reduce the speed the memory bus can run — see our guide to memory rank in HPE servers.
For deeper background, see our guides to memory speed and CAS latency.
Complete your DL380 G7 build
Need more than memory? Shop all components for this server:
- All DL380 G7 parts
- Processors, hard drives, storage controllers, network adapters, and power supplies
- Running a newer or older server? Browse all HPE ProLiant memory or find your model on the parts by server model page
Frequently asked questions
How much RAM does the HP ProLiant DL380 G7 support?
The DL380 G7 supports up to 384GB of memory using twelve 32GB quad-rank RDIMMs, or 288GB using eighteen 16GB dual-rank RDIMMs across all 18 DIMM slots. With unbuffered ECC memory, the maximum is 72GB (eighteen 4GB UDIMMs). The 288GB dual-rank configuration is usually the best choice because it fills every slot while maintaining a higher memory speed.
Is the HP ProLiant DL380 G7 end of life?
The DL380 G7 reached HP's end of support life around 2020, meaning HP no longer provides firmware updates or official support. However, the server remains fully functional and widely used, and genuine replacement parts — including memory — are still readily available. With quality components, a DL380 G7 can continue running reliably for lab, backup, secondary, and cost-sensitive production workloads.
What type of memory does the DL380 G7 use?
The DL380 G7 uses DDR3 ECC memory, in either Registered (RDIMM) or Unbuffered (UDIMM) form. RDIMMs are used for higher capacities and are the most common choice; UDIMMs are limited to smaller configurations. The server does not support Load-Reduced DIMMs (LRDIMM), and you cannot mix RDIMM and UDIMM memory in the same system.
What is the maximum memory speed of the DL380 G7?
The DL380 G7 supports memory speeds up to 1333 MT/s (PC3-10600), depending on the processor installed and how the DIMM slots are populated. Filling more slots or using higher-rank modules can reduce the effective speed. If you mix modules of different speeds, all memory runs at the speed of the slowest DIMM.
Why do 32GB DIMMs run slower in the DL380 G7?
32GB DDR3 modules for the DL380 G7 are quad-rank, and the server's chipset runs quad-rank memory at a reduced speed — typically 1066 MT/s in the first memory bank and lower in the second, with the third bank left unpopulated. This is a chipset limitation, not a fault. If memory bandwidth matters more than maximum capacity, eighteen 16GB dual-rank RDIMMs (288GB) will run faster than twelve 32GB quad-rank modules (384GB).
Can I mix new and refurbished memory in the DL380 G7?
You can, as long as the modules match in type (RDIMM or UDIMM), capacity, rank, and speed. Whether new or refurbished, all memory we sell for the DL380 G7 is genuine and tested for compatibility. For best performance, use identical modules across all channels and balance memory evenly between both processors.
Do I need to install DL380 G7 memory in matched sets?
For best performance, yes. The DL380 G7 uses triple-channel memory, so modules perform best installed in groups of three of identical capacity, rank, and speed, balanced across both processors. Install into the first white slot of each channel and populate in sequence. Mixing capacities or speeds is possible but reduces performance to the lowest common denominator.
✅ Need help selecting compatible memory for your DL380 G7? Contact us with your server details and we'll confirm the right modules before you order.
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