CPUBoss Review Our evaluation of E5-2640 vs E5-2620 v3 among all CPUs

Performance

Benchmark performance using all cores

PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

Single-core Performance

Individual core benchmark performance

PassMark (Single Core), Geekbench 3 Single Core and 1 more

Integrated Graphics

Integrated GPU performance for graphics

Sky Diver and Cloud Gate

Integrated Graphics (OpenCL)

Integrated GPU performance for parallel computing

CompuBench 1.5 Bitcoin mining and 4 more

Performance per Watt

How efficiently does the processor use electricity?

Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

Value

Are you paying a premium for performance?

Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

No winner declared

Too close to call

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VS

Differences What are the advantages of each

Front view of Intel Xeon E5-2640

Reasons to consider the
Intel Xeon E5-2640

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Higher clock speed 2.5 GHz vs 2.4 GHz Around 5% higher clock speed
Significantly better overclocked clock speed (Air) 2.9 GHz vs 2.66 GHz Around 10% better overclocked clock speed (Air)
Front view of Intel Xeon E5-2620 v3

Reasons to consider the
Intel Xeon E5-2620 v3

Report a correction
Much better performance per dollar 4.08 pt/$ vs 0.81 pt/$ More than 5x better performance per dollar
Supports more RAM 786,432 MB vs 393,216 MB Supports 2x more RAM
Higher turbo clock speed 3.2 GHz vs 3 GHz More than 5% higher turbo clock speed
Newer manufacturing process 22 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Lower typical power consumption 69.06W vs 77.19W More than 10% lower typical power consumption
Much better overclocked clock speed (Water) 2.87 GHz vs 2.5 GHz Around 15% better overclocked clock speed (Water)
Newer Jul, 2014 vs Mar, 2012 Release date over 2 years later
Lower annual commercial energy cost 74.46 $/year vs 83.22 $/year More than 10% lower annual commercial energy cost
Lower annual home energy cost 20.48 $/year vs 22.89 $/year More than 10% lower annual home energy cost

Benchmarks Real world tests of Xeon E5-2640 vs E5-2620 v3

GeekBench 3 (Multi-core) Data courtesy Primate Labs

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E5-2640
1,400,000 MB/s
Xeon E5-2620 v3
2,750,000 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon E5-2640  vs
E5-2620 v3 
Clock speed 2.5 GHz 2.4 GHz
Turbo clock speed 3 GHz 3.2 GHz
Cores Hexa core Hexa core

features

Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
AVX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
AVX 2.0
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 95W 85W
Annual home energy cost 22.89 $/year 20.48 $/year
Annual commercial energy cost 83.22 $/year 74.46 $/year
Performance per watt 7.66 pt/W 12.6 pt/W
Typical power consumption 77.19W 69.06W

bus

Architecture QPI QPI
Number of links 2 2
Data rate 57,600 MB/s 64,000 MB/s
Transfer rate 7,200 MT/s 8,000 MT/s
Clock speed 3,600 MHz 4,000 MHz

details

Xeon E5-2640  vs
E5-2620 v3 
Architecture x86-64 x86-64
Threads 12 12
L3 cache 15 MB 15 MB
L3 cache per core 2.5 MB/core 2.5 MB/core
Manufacture process 32 nm 22 nm
Max CPUs 2 2
Operating temperature Unknown - 73°C Unknown - 72.6°C

overclocking

Overclocked clock speed 2.9 GHz 2.66 GHz
Overclocked clock speed (Water) 2.5 GHz 2.87 GHz
Overclocked clock speed (Air) 2.9 GHz 2.66 GHz

integrated graphics

GPU None None
Label N/A N/A
Latest DirectX N/A N/A
Number of displays supported N/A N/A
GPU clock speed N/A N/A
Turbo clock speed N/A N/A
3DMark06 N/A N/A

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3
DDR3-800
DDR
Channels Quad Channel Quad Channel
Supports ECC Yes Yes
Maximum bandwidth 42,666.64 MB/s 6,400 MB/s
Maximum memory size 393,216 MB 786,432 MB
Intel Xeon E5-2640
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Intel Xeon E5-2620 v3
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