- 24 DIMMs
- Dual Socket
- 3 TB Max
PowerEdge R6625
Dell/Alienware - PowerEdge R6625
Spec-true kits—mapped to AMD EPYC 9005 memory rules—so upgrades behave like OEM.
- Spec-Locked — Aligns AMD controller limits, system topology, and JEDEC timing
- Predictable Speeds — 1DPC up to 5600 MT/s; 2DPC typically 5200 MT/s
- Balanced from Slot 1 — Mirrored channel population across sockets
- Enterprise Fulfillment — Lifetime warranty, advance replacement, expert support
- Sockets
- 2
- Max memory
- 3 TB
- Memory tech
- DDR54800 MT/s · ECC
About
The Dell Alienware R6625 is engineered for dependable scale. With 2× AMD EPYC 9005 processors and 12 memory channels per CPU, the platform provides 12 DIMM slots to reach 3 TB (1.5TB with current Kingston parts) using DDR5 RDIMM ECC.
This 1U rack server delivers exceptional compute density for enterprise workloads, featuring dual AMD EPYC 4th Generation 9004 series processors with up to 128 cores and support for up to 24 RDIMMs with memory speeds up to 4800 MT/s. The system supports PCI Express 5.0 enabled expansion slots for maximum I/O flexibility.
Why it matters: Proven Match™ converts controller rules and system topology into deterministic kits that install cleanly, train at the correct frequency, and avoid unsupported mixes.
Specs & Limits
| Specification | Details |
|---|---|
| CPU Sockets | 2 × AMD EPYC 9005 |
| Channels per CPU | 12 |
| DIMM Slots | 12 total (up to 2 DIMM(s)/channel) |
| Memory Type | DDR5 RDIMM ECC |
| Controller Speeds | 1DPC up to 5600 MT/s; 2DPC typically 5200 MT/s |
| Max Capacity | 3 TB (1.5TB with current Kingston parts) |
| Last Reviewed | 2026-02-12 |
The system supports RDIMM memory modules ranging from 16 GB single-rank to 256 GB octa-rank configurations. Memory module sockets operate at speeds up to 4800 MT/s across 24 288-pin slots.
Speed behavior: The CPU sets real memory bus speed. At 1 DIMM per channel (1DPC), platforms commonly reach up to 5600 MT/s. At 2 DIMMs per channel (2DPC), many controllers step to 5200 MT/s for stability. Listings reflect configured speed—not just the DIMM label.
Bank Schema (Population Map)
| Configuration | Population Strategy |
|---|---|
| Fastest (1DPC) | Populate one DIMM per channel across both CPUs |
| Balanced (2DPC) | Add second DIMM per channel mirrored across CPUs |
| Maximum | Fill remaining slots symmetrically for max capacity |
Memory population follows optimizer mode where DRAM controllers operate independently in 64-bit mode for optimized performance. In dual-processor configurations, memory configuration for each processor must be identical.
Proven Match™ surfaces only controller-safe, topology-compliant configurations.
Compatible Memory Types
- Curated Samsung / Micron / Hynix modules for DDR5 RDIMM ECC
- Zero-mix policy: No mixing RDIMMs with LRDIMMs; densities matched per channel
Critical Requirements:
- No RDIMM/LRDIMM mixing
- Symmetric densities per channel
- ECC required for server workloads
- Do not mix x4 and x8 DIMMs within a memory channel
- All DIMMs must be same capacity and width
Validation Tokens
Every configuration must satisfy three gates before it appears here:
- JEDEC DDR5 compliance
- AMD EPYC 9005 controller rules (1DPC/2DPC)
- OEM slot topology verification
Only builds passing all three are surfaced—stable, balanced, and performance-true.
Workloads by Memory Tier
Mid Tier
Ideal memory configurations for production environments requiring reliable performance:
- Virtualization (VM density) — Maximize guest instances per host
- Databases / OLTP — Transaction-heavy workloads with consistent latency
- App servers — Web and application tier scaling
- Streaming ETL — Real-time data pipeline processing
Max Tier
Maximum capacity configurations for memory-intensive enterprise applications:
- In-memory analytics (Spark/Arrow) — Large dataset processing without disk I/O
- AI/ML fine-tuning or training — Model development with extensive memory pools
- ERP consolidation — Unified enterprise resource planning deployments
- VDI at scale — High-density virtual desktop infrastructure
The platform is designed for demanding workloads including data warehouses, eCommerce, databases, and high-performance computing (HPC).
Upgrades are tied to outcomes—capacity and bandwidth scale predictably without instability.
PowerEdge R6625 memory questions
The questions our engineers answer on the phone every day.
Shop Compatible Kits
Pick your target: Fastest (1DPC) or Largest (2DPC/Max).
Every kit shows real-world speed and carries the Proven Match™ stamp.
What You Get with Proven Match™
- Lifetime warranty — Complete coverage for the life of your server
- Advance replacement — Minimize downtime with expedited shipping
- Server-savvy support — Technical experts who understand enterprise memory
Ready to Upgrade?
Configure your Dell Alienware R6625 with confidence. Our Proven Match™ guarantee ensures every module is validated against AMD EPYC 9005 controller specifications and Dell system topology requirements.
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