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UCS-CPU-E78891B Cisco 3.20GHz 8.00GT/s QPI 37.5MB L3 Cache
UCS-CPU-E78891B Overview
The Cisco UCS‑CPU‑E78891B is Cisco’s OEM-branded version of the Intel Xeon E7‑8891 v2 processor, part of Intel’s Ivy Bridge‑EX (E7 v2) series. It features 10 physical cores and 20 threads, running at a base clock of 3.20 GHz, which can turbo boost up to 3.70 GHz when thermal and power conditions allow.
With a generous 37.5 MB L3 cache, triple 8 GT/s QPI links, and support for quad‑channel DDR3‑1600 ECC memory—up to 1.5 TB per socket—this CPU is built for enterprise-grade scalability and high‑speed inter-socket communication.
UCS-CPU-E78891B Technical Specifications
Cisco 3.20GHz 8.00GT/s QPI 37.5MB L3 Cache Intel Xeon E7-8891 v2 10 Core Processor Upgrade
Brand Intel
Cisco UCS
Part No. UCS-CPU-E78891B
Processor Type Server Processor
Processor Family E7-8800v2
Series Intel Xeon Scalable Processor
Core Model Type/ProcNo. E7-8891v2
Processor Code Name Ivy Bridge
Core Stepping D1
Manufacturing Technology 22 nm
# of 10 Core
# of Threads 20
Clock Speed 3.20 GHz
L3 Cache Size 37.5MB Cache
Front Side Bus / QuickPath Interconnect 8.00 GT/s QPI
Thermal Power 155 Watts
CPU Socket Type LGA 2011
Product Condition OEM









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