PowerEdge R940xa

The Dell - Alienware R940xa is engineered for dependable scale and predictable memory behavior. Built around 4× Intel Xeon Scalable (2nd Gen) CPUs with 6 memory channels per socket, the platform exposes 12 DIMM slots and supports up to 3 TB using DDR4 RDIMM ECC modules.

Why it matters to IT:

• Deterministic capacity planning: 12 slots and 6‑channel topology per CPU deliver predictable scaling as you add DIMMs.
• Enterprise reliability: RDIMM ECC enforces error correction required for critical server workloads.
• Proven Match™ converts controller rules and system topology into deterministic kits that install cleanly, train at correct frequencies, and avoid unsupported mixes—reducing deployment surprises and warranty incidents.

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

Speed behavior and impact:

• The CPU memory controller dictates actual bus speed. At 1 DIMM per channel (1DPC) the platform commonly reaches up to 2933 MT/s; at 2 DIMMs per channel (2DPC) many controllers step to 2666 MT/s for stability.
• Listings and Proven Match™ kits reflect the configured, controller‑set speed—so you plan to delivered performance, not sticker specs.

Bank Schema (population map):

• Fastest (1DPC): Populate one DIMM per channel across both CPUs for maximum per‑DIMM bandwidth.
• Balanced (2DPC): Add a second DIMM per channel mirrored across CPUs to maintain symmetry and capacity scaling.
• Maximum: Fill remaining slots symmetrically to reach the 3 TB capacity ceiling.

Compatible memory types and rules enforced:

• Curated Samsung / Micron / Hynix modules for DDR4 RDIMM ECC.
• Zero‑mix policy: No mixing RDIMMs with LRDIMMs; densities matched per channel.
• No RDIMM/LRDIMM mixing. Symmetric densities per channel. ECC required for server workloads.

Validation tokens — what Proven Match™ verifies before a kit appears:

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

Only builds passing all three gates are surfaced—stable, balanced, and performance‑true.

Mid Tier — optimize density and cost for high VM and OLTP efficiency:

• Virtualization (higher VM density)
• Databases / OLTP
• Application servers
• Streaming ETL

Max Tier — prioritize capacity and in‑memory performance:

• In‑memory analytics (Spark/Arrow)
• AI/ML fine‑tuning or training
• ERP consolidation
• VDI at scale

Outcome focus: Upgrades are tied to operational outcomes—capacity and bandwidth scale predictably without configuration instability or unsupported mixes.

Pick your target: Fastest (1DPC) or Largest (2DPC/Max). Every kit displays real-world speed, validated topology, and carries the Proven Match™ stamp so you deploy with confidence.

• Lifetime warranty
• Advance replacement
• Server‑savvy support