- 16 DIMMs
- Dual Socket
- 2 TB Max
PowerEdge C6420
Dell/Alienware - PowerEdge C6420
Spec-true memory kits engineered for Intel Xeon Scalable (2nd Gen) controller rules—delivering OEM-grade reliability without the OEM markup.
- Spec-Locked — Every kit aligns with Intel controller limits, C6420 sled topology, and JEDEC timing standards
- Predictable Speeds — 1DPC configurations reach up to 2933 MT/s; 2DPC typically operates at 2666 MT/s for stability
- Balanced Population — Mirrored channel configuration across both processor sockets for optimal bandwidth
- Enterprise Fulfillment — Lifetime warranty, advance replacement, and server-savvy technical support
- Sockets
- 2
- Max memory
- 2 TB1 TB LRDIMM · 2 TB RDIMM
- Memory tech
- DDR43200 MT/s · ECC
About the PowerEdge C6420
The Dell EMC PowerEdge C6420 delivers exceptional compute density in a multi-node architecture designed for scale-out environments. Each independent sled supports up to two Intel Xeon Scalable (2nd Gen) processors, providing up to 28 cores per processor for intensive parallel workloads. With 16 DIMM slots per sled and support for both RDIMM and LRDIMM configurations, the platform scales to 1 TB with RDIMMs or 2 TB with LRDIMMs in dual-processor configurations.
Why Proven Match™ matters: Memory upgrades for multi-node systems demand precision. Our deterministic kits map Intel Xeon Scalable controller rules to your specific sled topology—ensuring clean installation, correct frequency training, and zero unsupported configurations.
Technical Specifications
| Specification | Detail |
|---|---|
| CPU Sockets | 2 × Intel Xeon Scalable (2nd Gen) per sled |
| Memory Slots | 16 DIMM slots per sled (8 per processor) |
| Channels per CPU | 6 memory channels |
| DIMMs per Channel | Up to 2 DIMMs per channel |
| Memory Types | DDR4 RDIMM (Single/Dual Rank) and LRDIMM (Quad/Octal Rank) |
| Max Capacity (RDIMM) | 1 TB with dual processors (64 GB modules) |
| Max Capacity (LRDIMM) | 2 TB with dual processors (128 GB modules) |
| Controller Speeds | 1DPC: up to 2933 MT/s / 2DPC: typically 2666 MT/s |
Supported Memory Configurations
RDIMM Options:
- Single Rank: 8 GB modules (16 GB–128 GB total with dual CPU)
- Dual Rank: 16 GB, 32 GB, or 64 GB modules (32 GB–1 TB total with dual CPU)
LRDIMM Options:
- Quad Rank: 64 GB modules (128 GB–1 TB total with dual CPU)
- Octal Rank: 128 GB modules (256 GB–2 TB total with dual CPU)
Speed Behavior Explained
The CPU memory controller determines actual bus speed—not the DIMM label. At 1 DIMM per channel (1DPC), the platform commonly reaches 2933 MT/s. At 2 DIMMs per channel (2DPC), controllers typically step down to 2666 MT/s to maintain signal integrity. All Proven Match™ listings reflect configured speed, not rated speed.
Population Guidelines
| Tier | Configuration | Benefit |
|---|---|---|
| Fastest (1DPC) | One DIMM per channel across both CPUs | Maximum bandwidth at 2933 MT/s |
| Balanced (2DPC) | Two DIMMs per channel, mirrored across CPUs | Optimal capacity-to-performance ratio |
| Maximum | All slots populated symmetrically | Peak capacity for memory-intensive workloads |
Proven Match™ surfaces only configurations that pass Intel controller validation and Dell topology requirements.
Compatible Memory Standards
- Curated modules from Samsung, Micron, and Hynix—verified for DDR4 RDIMM and LRDIMM ECC operation
- Zero-mix policy: RDIMMs and LRDIMMs cannot be combined; densities must match within each channel
- Automatic filtering: Unsupported combinations never appear in the catalog
Configuration Rules
- No RDIMM/LRDIMM mixing within the system
- Symmetric densities required per memory channel
- ECC mandatory for all server workloads
- Note: 32 GB RDIMMs with x4/8Gb DRAM cannot mix with 32 GB RDIMMs using x8/16Gb DRAM
Validation Gates
Every Proven Match™ configuration passes three verification stages:
- JEDEC DDR4 Compliance — Timing, voltage, and signal integrity standards
- Intel Xeon Scalable Controller Rules — 1DPC/2DPC population and speed requirements
- Dell C6420 Topology Verification — Sled-specific slot mapping and thermal constraints
Only configurations satisfying all three gates appear in our catalog—guaranteeing stable, balanced, performance-true operation.
Workload Optimization by Memory Tier
Mid-Tier Configurations (256 GB–512 GB per sled)
Ideal for workloads requiring solid memory capacity with excellent per-core bandwidth:
- Virtualization platforms — Maximize VM density with balanced memory-to-core ratios
- Database servers — Support OLTP workloads with adequate buffer pool sizing
- Application servers — Run containerized microservices at scale
- Streaming ETL — Process real-time data pipelines with consistent throughput
Max-Tier Configurations (1 TB–2 TB per sled)
Purpose-built for memory-intensive enterprise applications:
- In-memory analytics — Power Spark, Arrow, and columnar databases at full speed
- AI/ML workloads — Support model fine-tuning and training with massive datasets
- ERP consolidation — Host multiple SAP or Oracle instances on fewer nodes
- VDI at scale — Deliver hundreds of virtual desktops per sled
The C6420's four-sled-per-enclosure design means you can scale total memory to 8 TB per 2U chassis with LRDIMM configurations.
PowerEdge C6420 memory questions
The questions our engineers answer on the phone every day.
Find Your Proven Match™ Configuration
Select your performance target and let our configuration engine surface validated options:
| Goal | Configuration | Result |
|---|---|---|
| Maximum Speed | 1DPC population | Up to 2933 MT/s per channel |
| Maximum Capacity | 2DPC/Full population | Up to 2 TB per sled with LRDIMMs |
Every Kit Includes:
- Lifetime warranty — Coverage that outlasts your server's service life
- Advance replacement — Failed modules replaced before you ship the original
- Expert support — Server memory specialists who understand controller rules and topology
Proven Match™ Guarantee: If our memory doesn't train at the listed speed in your verified C6420 configuration, we make it right—period.
[Browse Compatible Memory Kits →]