Intel Xeon E5645 vs. Intel Xeon E3-1280V2

CPU Comparison, Reviews and Tests
Intel Xeon E5645
Intel Xeon E3-1280V2

In depth comparison and review of Intel Xeon E5645 and Intel Xeon E3-1280V2. Compare dimensions, performance, cache memory, number of cores, clock speed, RAM, power efficiency and other important specifications and features to easily choose the right CPU for you. Our goal is to help you uncover differences between the products and find the processor that will best fit your needs.

CPUs Specifications Comparison

Intel Xeon E5645 vs. Intel Xeon E3-1280V2 Benchmark Chart
GENERAL Intel Xeon E5645 Intel Xeon E3-1280V2
Product Type Processor Processor
PROCESSOR Intel Xeon E5645 Intel Xeon E3-1280V2
Type Intel Xeon E5645 Intel Xeon E3-1280V2
ARCHITECTURE
Processor Qty 1 1
Max Supported Qty 1 -
Compatible Processor Socket LGA1366 Socket LGA1155 Socket
Core Voltage 0.75 V - 1.35 V -
Manufacturing Process 32 nm 22 nm
Thermal Design Power 80 W 69 W
Thermal Specification 76.2 °C -
PCI Express Revision - 3.0
PCI Express Configurations - 1x16+1x4, 1x8+3x4, 2x8+1x4
Architecture Features Hyper-Threading Technology, Demand Based Switching, Execute Disable Bit capability, Intel Virtualization Technology Enhanced SpeedStep technology, Hyper-Threading Technology, Intel Virtualization Technology, Intel Trusted Execution Technology, Intel Turbo Boost Technology 2.0
PERFORMANCE
Number of Cores 6-core Quad-Core
Number of Threads 12 threads 8 threads
Clock Speed (Frequency) 2.4 GHz 3.6 GHz
Max Turbo Speed 2.67 GHz 4 GHz
Bus Speed 1333 MHz -
64-bit Computing Yes Yes
CACHE MEMORY
Cache 12 MB 8 MB
Cache Memory Details L2 - 6 x 256 KB
L3 - 12 MB		 Smart Cache - 8 MB
Installed Size 12 MB 8 MB
Type Advanced Smart Cache -
EXPANSION & CONNECTIVITY Intel Xeon E5645 Intel Xeon E3-1280V2
Compatible Slots 1 x processor 1 x processor - LGA1155 Socket
MISCELLANEOUS Intel Xeon E5645 Intel Xeon E3-1280V2
Included Accessories Cooler (fansink) -
Compliant Standards RoHS RoHS
Service & Support 1-year warranty Limited warranty - 3 years
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