CPUBoss Review Our evaluation of E5-2665 vs E5-1620 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 E5-2665

Reasons to consider the
Intel Xeon E5-2665

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Much more l3 cache 20 MB vs 10 MB 2x more l3 cache; more data can be stored in the l3 cache for quick access later
Much more l2 cache 2 MB vs 1 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
More cores 8 vs 4 Twice as many cores; run more applications at once
Much higher Maximum operating temperature 81.8 °C vs 64 °C Around 30% higher Maximum operating temperature
More threads 16 vs 8 Twice as many threads
Lower typical power consumption 93.44W vs 105.63W More than 10% lower typical power consumption
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Lower annual commercial energy cost 100.74 $/year vs 113.88 $/year More than 10% lower annual commercial energy cost
Lower annual home energy cost 27.7 $/year vs 31.32 $/year More than 10% lower annual home energy cost
Front view of Intel Xeon E5-1620

Reasons to consider the
Intel Xeon E5-1620

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Much higher clock speed 3.6 GHz vs 2.4 GHz More than 50% higher clock speed
Much higher turbo clock speed 3.8 GHz vs 3.1 GHz Around 25% higher turbo clock speed
Much better performance per dollar 3.3 pt/$ vs 0.56 pt/$ Around 6x better performance per dollar
Much better overclocked clock speed (Air) 3.93 GHz vs 2.71 GHz Around 45% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 4.7 GHz vs 2.96 GHz Around 60% better overclocked clock speed (Water)

Benchmarks Real world tests of Xeon E5-2665 vs E5-1620

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon E5-2665
15,331
Xeon E5-1620
12,397

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E5-2665
1,640,000 MB/s
Xeon E5-1620
2,460,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Xeon E5-2665
19,366
Xeon E5-1620
13,003

GeekBench

Xeon E5-2665
19,366
Xeon E5-1620
13,786

PassMark Data courtesy Passmark

Xeon E5-2665
11,941
Xeon E5-1620
9,487

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon E5-2665  vs
E5-1620 
Clock speed 2.4 GHz 3.6 GHz
Turbo clock speed 3.1 GHz 3.8 GHz
Cores Octa core Quad 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 115W 130W
Annual home energy cost 27.7 $/year 31.32 $/year
Annual commercial energy cost 100.74 $/year 113.88 $/year
Performance per watt 7.04 pt/W 7.47 pt/W
Typical power consumption 93.44W 105.63W

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 384,000 MB

details

Xeon E5-2665  vs
E5-1620 
Architecture x86-64 x86-64
Threads 16 8
L2 cache 2 MB 1 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 20 MB 10 MB
L3 cache per core 2.5 MB/core 2.5 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 2 1
Clock multiplier 31 38
Voltage range 0.6 - 1.35V 0.6 - 1.35V
Operating temperature Unknown - 81.8°C Unknown - 64°C

overclocking

Overclocked clock speed 2.71 GHz 3.93 GHz
Overclocked clock speed (Water) 2.96 GHz 4.7 GHz
Overclocked clock speed (Air) 2.71 GHz 3.93 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

bus

Architecture QPI QPI
Number of links 2 0
Transfer rate 8,000 MT/s 0 MT/s
Clock speed 4,000 MHz 0 MHz
Intel Xeon E5-2665
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Intel Xeon E5-1620
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