PowerEdge R840

The Dell - Alienware R840 is engineered for dependable scale with 4× Intel Xeon Scalable (2nd Gen) processors and 6 memory channels per CPU, delivering 12 DIMM slots for balanced capacity growth.
The platform supports up to 3 TB using DDR4 RDIMM ECC for high-availability, error-correcting server memory.

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.

• CPU Sockets: 4 × Intel Xeon Scalable (2nd Gen).
• Channels per CPU: 6.
• DIMM Slots: 12 total (supports up to 2 DIMMs per channel).
• Memory Type: DDR4 RDIMM ECC.
• Controller Speeds: 1DPC up to 2933 MT/s; 2DPC typically 2666 MT/s.
• Max Capacity: Up to 3 TB using registered ECC RDIMMs.
• Last Reviewed: 2026-02-12

Speed behavior — the CPU memory controller determines real bus speed, so listings reflect configured (in-system) speed rather than raw DIMM label.

Bank Schema (Population Map)

• Fastest (1DPC): Populate one DIMM per channel across CPUs for maximum frequency and lowest latency.
• Balanced (2DPC): Add second DIMM per channel mirrored across sockets to increase capacity while maintaining controller symmetry.
• Maximum: Fill remaining slots symmetrically to reach peak capacity while preserving topology rules.

Proven Match™ only surfaces controller-safe, topology-compliant configurations to eliminate guesswork.

Compatible Memory Types & Rules

• Curated DDR4 RDIMM ECC modules from Samsung, Micron, and Hynix tested for R840 compatibility.
• Zero-mix policy — no RDIMM/LRDIMM mixing and densities are matched per channel to preserve controller stability.
• Unsupported combinations (e.g., RDIMM with LRDIMM) do not appear in the Proven Match™ catalog.
• ECC is required for server workloads to protect data integrity.

Validation Gates

Every kit listed passes three deterministic checks before shipment:

1. JEDEC DDR4 compliance.
2. Intel Xeon Scalable (2nd Gen) controller rules (1DPC/2DPC).
3. OEM slot-topology verification for the R840 chassis.

Only builds that pass all three gates are offered—stable, balanced, and performance-true.

Mid Tier — maximize VM density, OLTP databases, app servers, and streaming ETL with predictable capacity and bandwidth.
Max Tier — scale to in-memory analytics (Spark/Arrow), AI/ML fine-tuning or training, ERP consolidation, and large VDI deployments where both memory footprint and bandwidth are critical.

Upgrades are outcome-focused: choose the kit that maps to your required VM density, dataset size, or analytics working set.

Pick your target: Fastest (1DPC) for peak frequency or Largest (2DPC/Max) for maximum capacity. Every kit shows real-world in-system speed, topology guidance, and carries the Proven Match™ stamp.

• Lifetime warranty
• Advance replacement
• Server-savvy technical support