$631.75In Stock — Usually Ships in 1–3 Business Days
About the 371-3953
Sourced for enterprise IT teams, the Sun 371-3953 (371-3953 - Sun 2.13GHz 1066MHz FSB 12MB L2 Cache Intel Xeon L5408 Quad Core Processor for Netra X4250) is a Intel Unboxed Processors component appropriate for new-build, expansion, or warranty-replacement procurement. Technical specifications include clock speed of 2.13 GHz, bus speed of 1066 MHz FSB, cache of 12MB L2. Typical use cases include data-center server fleet refresh, replacement of dead-on-arrival CPUs under existing service contracts, second-socket population on partially-populated dual-socket boards, and lab/test rebuild programs. Pro Disk Network supplies the 371-3953 to US business buyers. Stocked units ship in 1–3 business days. Pro Disk Network applies a 90-day functional warranty. Free US ground shipping on orders over $150.
The 371-3953 is a Sun intel unboxed processors component with clock speed 2.13 GHz, bus speed 1066 MHz FSB, cache 12MB L2. Pro Disk Network sells the 371-3953 for $631.75 with US shipping in 1–3 business days and a 30-day return guarantee.
Reviewed By
Reviewed by:Pro Disk Network Engineering Team — . Specifications, compatibility, and pricing for the 371-3953 are shown on this page.
Trust Signals
US-based LLC — 7345 W Sand Lake Rd, STE 210, Office 3208, Orlando, FL 32819
US Shipping in 1–3 Business Days — in-stock orders ship via UPS
30-Day Returns — pre-paid label on DOA and defective items
Confirm the socket against your motherboard's CPU support list - Intel Xeon Scalable spans LGA 3647 (1st/2nd gen), LGA 4189 (3rd gen Ice Lake), and LGA 4677 (4th/5th gen Sapphire/Emerald Rapids). A BIOS update is often required for newer steppings even on the same socket. Email sales@prodisknetwork.com with your motherboard model for a compatibility check.
How fast does the 371-3953 ship?
Pro Disk Network usually dispatches the 371-3953 in 1–3 business days. Multi-pallet projects requiring crating ship within 2 business days. International shipping (Canada, Mexico, EU, APAC) takes 3-7 business days via DHL Express or FedEx International Priority.
The 371-3953 is deployed by US enterprises, MSPs, government, and education customers across multiple infrastructure scenarios. Below are the most common deployment patterns Pro Disk Network sees in real-world orders.
Citrix VDI Pool — Frequency-sensitive — prefer high-clock 16–18 core SKUs over high-core-count parts to maintain user-perceived snappiness.
Kubernetes / Tanzu Workers — Higher core count amortises better across many small Pods. EVC mode planning matters for live-migrate parity.
AI Inference Host — Sapphire Rapids and Emerald Rapids include AMX silicon for INT8 inference acceleration — meaningful uplift for BERT, ResNet, and LLM serving.
What is the 371-3953?
The 371-3953 is a Sun server-class processor with clock speed 2.13 GHz and bus speed 1066 MHz FSB, manufactured by Sun. Pro Disk Network ships this part new and certified-refurbished from our US warehouse with dispatch in 1–3 business days, backed by a 30-day return guarantee.
Pros & Cons of 371-3953
Pros
Lower cost than the manufacturer channel for refresh cycles
Matched-pair option for dual-socket consistency
Sequential serial numbers on bulk orders for cluster builds
Cons
Older socket family — confirm motherboard compatibility
BIOS update typically required for newer CPU steppings
Not a fit for desktop platforms — these are server SKUs
Frequently Asked Questions about 371-3953
Is the 371-3953 a genuine Sun part?
Yes. Pro Disk Network sources every 371-3953 as factory-original Sun inventory. New units arrive sealed in OEM packaging; refurbished units are pulled from decommissioned Sun servers, surface-tested, and re-warranted by Pro Disk Network for 90 days.
What socket does the 371-3953 use?
Confirm the socket against your motherboard's CPU support list - Intel Xeon Scalable spans LGA 3647 (1st/2nd gen), LGA 4189 (3rd gen Ice Lake), and LGA 4677 (4th/5th gen Sapphire/Emerald Rapids). A BIOS update is often required for newer steppings even on the same socket. Email sales@prodisknetwork.com with your motherboard model for a compatibility check.
How fast does the 371-3953 ship?
Pro Disk Network usually dispatches the 371-3953 in 1–3 business days. Multi-pallet projects requiring crating ship within 2 business days. International shipping (Canada, Mexico, EU, APAC) takes 3-7 business days via DHL Express or FedEx International Priority.
What is the warranty on the 371-3953?
New 371-3953 units carry the full Sun manufacturer warranty (typically 1 to 5 years depending on product line). Refurbished and bulk-OEM units include a Pro Disk Network advance-replacement warranty (90 days refurbished). DOA replacement is free within 30 days of receipt.
Do you offer bulk pricing for the 371-3953?
Email sales@prodisknetwork.com with the quantity and target ship date for a quote within one business day.
371-3991 — 371-3991 - Sun 4-Port SAS 3GB/s PCI-Express Internal Host Bus Adapter — $121.05
371-3991-01 — 371-3991-01 - Sun 4-Port SAS 3GB/s PCI-Express Host Bus Adapter — $226.08
371-3992 — 371-3992 - Sun Fan Tray Assembly RoHS-Y — $163.16
Pro Disk Network Buyer’s Guide: Intel Unboxed Processors
Socket Compatibility, EVC Mode, and BIOS Revision Planning
For Hyper-V clusters, Live Migration compatibility is more forgiving but still benefits from matched CPU stepping across cluster nodes. For Kubernetes / Tanzu, CPU heterogeneity is acceptable because pods are stateless, but resource-request planning becomes harder when nodes have different core counts.
AI Workloads, AMX, and the Inference Performance Story
Late-generation Intel Xeon processors (Sapphire Rapids, Emerald Rapids, Granite Rapids) include AMX (Advanced Matrix Extensions) silicon that accelerates INT8 inference workloads dramatically. For the 371-3953, if AMX is present, BERT-base inference throughput improves 4-6× over the previous generation; LLM inference (Llama 2 7B INT8 quantised) improves 2-3×. AMX does not require code changes when used through libraries that already support it (oneAPI, ONNX Runtime, OpenVINO).