CPUBoss Review Our evaluation of E5-4650 vs E5-4640 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

5.4

CPUBoss Score

Combination of all six facets

Winner
Intel Xeon E5-4640 

CPUBoss recommends the Intel Xeon E5-4640  based on its cost to run and value.

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VS

Differences What are the advantages of each

Front view of Intel Xeon E5-4650

Reasons to consider the
Intel Xeon E5-4650

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Much higher clock speed 2.7 GHz vs 2.4 GHz Around 15% higher clock speed
Significantly higher turbo clock speed 3.3 GHz vs 2.8 GHz Around 20% higher turbo clock speed
Significantly better overclocked clock speed (Air) 2.94 GHz vs 2.63 GHz More than 10% better overclocked clock speed (Air)
Significantly better overclocked clock speed (Water) 2.7 GHz vs 2.4 GHz Around 15% better overclocked clock speed (Water)
Front view of Intel Xeon E5-4640

Reasons to consider the
Intel Xeon E5-4640

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Significantly lower typical power consumption 77.19W vs 105.63W More than 25% lower typical power consumption
Significantly lower annual commercial energy cost 83.22 $/year vs 113.88 $/year More than 25% lower annual commercial energy cost
Significantly lower annual home energy cost 22.89 $/year vs 31.32 $/year More than 25% lower annual home energy cost

Benchmarks Real world tests of Xeon E5-4650 vs E5-4640

PassMark Data courtesy Passmark

Xeon E5-4650
11,960
Xeon E5-4640
10,523

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon E5-4650  vs
E5-4640 
Clock speed 2.7 GHz 2.4 GHz
Turbo clock speed 3.3 GHz 2.8 GHz
Cores Octa core Octa core
Socket type
LGA 2011

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
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 130W 95W
Annual home energy cost 31.32 $/year 22.89 $/year
Annual commercial energy cost 113.88 $/year 83.22 $/year
Performance per watt 2.52 pt/W 1.83 pt/W
Typical power consumption 105.63W 77.19W

bus

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

details

Xeon E5-4650  vs
E5-4640 
Architecture x86-64 x86-64
Threads 16 16
L2 cache 2 MB 2 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 20 MB 20 MB
L3 cache per core 2.5 MB/core 2.5 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 4 4
Voltage range 0.6 - 1.35V 0.6 - 1.35V

overclocking

Overclocked clock speed 2.94 GHz 2.63 GHz
Overclocked clock speed (Water) 2.7 GHz 2.4 GHz
Overclocked clock speed (Air) 2.94 GHz 2.63 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
DDR3-1600
DDR3-1333
DDR3-1066
DDR3
DDR3-800
Channels Quad Channel Quad Channel
Supports ECC Yes Yes
Maximum bandwidth 51,200 MB/s 51,200 MB/s
Maximum memory size 393,216 MB 393,216 MB
Intel Xeon E5-4650
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Intel Xeon E5-4640
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