Intel Xeon E5645 vs. Intel Xeon E5-4640

CPU Comparison, Reviews and Tests
Intel Xeon E5645
Intel Xeon E5-4640

In depth comparison and review of Intel Xeon E5645 and Intel Xeon E5-4640. 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 E5-4640 Benchmark Chart
GENERAL Intel Xeon E5645 Intel Xeon E5-4640
Product Type Processor Processor
Packaged Quantity - 2 (specifications are for single item)
PROCESSOR Intel Xeon E5645 Intel Xeon E5-4640
Type Intel Xeon E5645 Intel Xeon E5-4640
ARCHITECTURE
Processor Qty 1 1
Max Supported Qty 1 -
Compatible Processor Socket LGA1366 Socket LGA2011 Socket
Core Voltage 0.75 V - 1.35 V 0.6 V - 1.35 V
Manufacturing Process 32 nm 32 nm
Thermal Design Power 80 W 95 W
Thermal Specification 76.2 °C -
PCI Express Revision - 3.0
PCI Express Lanes Qty - 40
Architecture Features Hyper-Threading Technology, Demand Based Switching, Execute Disable Bit capability, Intel Virtualization Technology SpeedStep technology, Execute Disable Bit capability, Intel Trusted Execution Technology, Intel Turbo Boost Technology 2.0, Intel vPro Technology
PERFORMANCE
Number of Cores 6-core 8-core
Number of Threads 12 threads 16 threads
Clock Speed (Frequency) 2.4 GHz 2.4 GHz
Max Turbo Speed 2.67 GHz 2.8 GHz
Bus Speed 1333 MHz 1600 MHz
64-bit Computing Yes Yes
CACHE MEMORY
Cache 12 MB 20 MB
Cache Memory Details L2 - 6 x 256 KB
L3 - 12 MB		 L3 - 16 MB
Installed Size 12 MB 20 MB
Type Advanced Smart Cache -
EXPANSION & CONNECTIVITY Intel Xeon E5645 Intel Xeon E5-4640
Compatible Slots 1 x processor 1 x processor - LGA2011 Socket
MISCELLANEOUS Intel Xeon E5645 Intel Xeon E5-4640
Included Accessories Cooler (fansink) -
Compliant Standards RoHS Halogen-free
Service & Support 1-year warranty -
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