Intel Xeon E5640 vs. Intel Xeon E5-2665

CPU Comparison, Reviews and Tests

Side by side comparison and review of Intel Xeon E5640 and Intel Xeon E5-2665. Compare overall performance, core and thread counts, cache memory, speed, power efficiency, dimensions, socket compatibility and other key specifications and features to simplify the choice of your perfect CPU. Our goal is to make it easier for you to decide on the processor that will best meet your expectations by revealing the main differences between the products.

CPUs Specifications Comparison

Intel Xeon E5640 vs. Intel Xeon E5-2665 Benchmark Chart
GENERAL Intel Xeon E5640 Intel Xeon E5-2665
Product Type Processor Processor
PROCESSOR Intel Xeon E5640 Intel Xeon E5-2665
Type Intel Xeon E5640 Intel Xeon E5-2665
ARCHITECTURE
Processor Qty 1 1
Compatible Processor Socket LGA1366 Socket LGA2011 Socket
Core Voltage 0.8 V - 1.3 V 0.6 V - 1.35 V
Manufacturing Process 32 nm 32 nm
Thermal Design Power 80 W 115 W
Thermal Specification 77.6 °C 81.8 °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 Turbo Boost Technology, Intel Trusted Execution Technology, Intel vPro Technology
PERFORMANCE
Number of Cores Quad-Core 8-core
Number of Threads 8 threads 16 threads
Clock Speed (Frequency) 2.66 GHz 2.4 GHz
Max Turbo Speed 2.93 GHz 3.1 GHz
Bus Speed 1066 MHz 1600 MHz
64-bit Computing Yes Yes
CACHE MEMORY
Cache 12 MB 20 MB
Cache Memory Details L2 - 1 MB Smart Cache - 20 MB
Installed Size 12 MB 20 MB
EXPANSION & CONNECTIVITY Intel Xeon E5640 Intel Xeon E5-2665
Compatible Slots 1 x processor 1 x processor - LGA2011 Socket
MISCELLANEOUS Intel Xeon E5640 Intel Xeon E5-2665
Included Accessories Heat sink Passive heatsink
Compliant Standards RoHS RoHS
Service & Support Limited warranty - 1 year - on-site Limited warranty - 1 year
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