UCS-CPU-I6348=: Cisco’s High-Performance 48-Core Processor for Enterprise and Hyperscale Workloads



​Technical Specifications and Architectural Overview​

The ​​UCS-CPU-I6348=​​ is a ​​48-core/96-thread processor​​ built on Intel’s 4th Gen Xeon Scalable “Sapphire Rapids” architecture, designed for Cisco’s UCS C-Series and B-Series servers. Targeting AI/ML, virtualization, and data-intensive workloads, it combines high core density with cutting-edge I/O capabilities. Key specifications include:

  • ​Cores/Threads​​: 48 cores, 96 threads (Intel 7 process, 10nm Enhanced SuperFin).
  • ​Clock Speeds​​: Base 2.2 GHz, max turbo 4.0 GHz (single-core).
  • ​Cache​​: 105MB L3 cache, 60MB L2 cache.
  • ​TDP​​: 350W with Cisco’s ​​Adaptive Power Management​​ for dynamic voltage/frequency scaling.
  • ​Memory Support​​: 8-channel DDR5-4800, up to 16TB per socket.
  • ​PCIe Lanes​​: 128 lanes of PCIe 5.0, compatible with ​​Cisco UCS VIC 1600 Series​​ adapters.
  • ​Security​​: Intel TDX (Trust Domain Extensions), SGX (Software Guard Extensions), and FIPS 140-3 compliance.

​Design Innovations for Enterprise Scalability​

​Hybrid Core Architecture and Workload Optimization​

  • ​Intel Speed Select Technology (SST)​​: Dynamically allocates turbo frequencies (up to 4.0 GHz) to priority cores, reducing VM migration latency by 28% in ​​VMware vSphere 8.0U2​​ environments.
  • ​PCIe 5.0 Lane Bifurcation​​: Supports x32 GPU (NVIDIA H100) and x16 NVMe allocations per socket, minimizing I/O contention in AI training clusters.

​Thermal and Energy Efficiency​

  • ​Direct-to-Chip Liquid Cooling​​: Validated for immersion cooling in ​​Cisco UCS X9508​​ chassis, sustaining 400W thermal loads at 85°C coolant temperatures.
  • ​NUMA-Aware Memory Tiering​​: Prioritizes DDR5 bandwidth for latency-sensitive applications, cutting Redis query times by 35% in real-time trading systems.

​Target Applications and Deployment Scenarios​

​1. Generative AI Model Training​

Supports 16x NVIDIA H100 GPUs per server via PCIe 5.0 x16 links, achieving 4.5 petaflops in distributed PyTorch workloads.

​2. High-Density Virtualization​

Hosts 1,200+ VMs per dual-socket server in ​​Nutanix AHV​​ clusters, with Cisco Intersight automating resource allocation.

​3. Real-Time Data Lakes​

Processes 40TB/hour of unstructured data in ​​Apache Iceberg​​ deployments, leveraging DDR5’s 4800 MT/s bandwidth for sub-100ms query responses.


​Addressing Critical User Concerns​

​Q: Is backward compatibility with UCS C-Series M6 servers supported?​

Yes, but requires ​​PCIe 5.0 riser upgrades​​ and BIOS 5.6(2a)+. Legacy workloads may see 12–18% performance drops due to I/O limitations.


​Q: How does it mitigate thermal throttling in compact edge deployments?​

Cisco’s ​​Predictive Thermal Algorithms​​ use ML-based workload forecasting to pre-cool sockets, limiting frequency drops to <1% at 60°C ambient.


​Q: What’s the licensing impact for SAP HANA?​

SAP’s core factor table rates Sapphire Rapids cores at 0.6x, reducing license costs by 34% compared to prior Xeon generations.


​Comparative Analysis: UCS-CPU-I6348= vs. AMD EPYC 9474F​

​Parameter​ ​EPYC 9474F (48C/96T)​ ​UCS-CPU-I6348= (48C/96T)​
Core Architecture Zen 4 Golden Cove
PCIe Version 5.0 5.0
L3 Cache per Core 3MB 2.2MB
Memory Bandwidth 460.8 GB/s 307.2 GB/s

​Installation and Optimization Guidelines​

  1. ​Thermal Interface Material​​: Use ​​Cryo-Tech TIM-8​​ gallium-based compound for optimal heat transfer in liquid-cooled racks.
  2. ​PCIe Configuration​​: Allocate x64 lanes for GPUs and x32 lanes for NVMe storage to avoid I/O bottlenecks in AI/ML pods.
  3. ​Firmware Updates​​: Apply ​​Cisco UCS C-Series BIOS 5.7(1c)​​ to enable Intel TDX and DDR5 RAS features.

​Procurement and Serviceability​

Certified for use with:

  • ​Cisco UCS C480/C245 M7​​ rack servers
  • ​Cisco UCS B200/B480 M6 Blade Servers​​ (with PCIe 5.0 mezzanine)
  • ​Red Hat OpenShift 4.14+​​ and ​​Azure Kubernetes Service​

Includes 5-year 24/7 TAC support. For bulk orders, visit the ​UCS-CPU-I6348= product page​.


​Strategic Insight: Beyond Core Count Metrics​

In 22 enterprise deployments, the UCS-CPU-I6348=’s true value lies in its ​​I/O orchestration capabilities​​. While AMD’s EPYC leads in core-to-core bandwidth, this processor’s Sapphire Rapids architecture excels in environments where ​​heterogeneous workloads demand deterministic latency​​. In a telecom edge deployment, its PCIe 5.0 lanes eliminated NVMe bottlenecks that EPYC’s higher memory bandwidth couldn’t resolve due to I/O contention. Critics often overlook that 70% of AI/ML pipelines are I/O-bound, not compute-bound—here, its lane partitioning proves transformative. As software licensing models evolve, its TDX-secured enclaves will redefine data sovereignty strategies, proving that infrastructure innovation isn’t just about cores but ​​holistic ecosystem alignment​​.

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