CPUBoss Review Our evaluation of E5603 vs 6700K among all CPUs

Performance

Benchmark performance using all cores
Xeon E5603
5.3
Core i7 6700K
6.5
Core i7 4790K
6.5
PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

Single-core Performance

Individual core benchmark performance
Xeon E5603
5.8
Core i7 6700K
10.0
Core i7 4790K
9.8
PassMark (Single Core), Geekbench 3 Single Core and 1 more

Integrated Graphics

Integrated GPU performance for graphics
Xeon E5603
n.d.
Core i7 6700K
n.d.
Core i7 4790K
n.d.
Sky Diver and Cloud Gate

Integrated Graphics (OpenCL)

Integrated GPU performance for parallel computing
Xeon E5603
0.0
Core i7 6700K
7.6
Core i7 4790K
6.9
CompuBench 1.5 Bitcoin mining and 4 more

Performance per Watt

How efficiently does the processor use electricity?
Xeon E5603
5.0
Core i7 6700K
5.2
Core i7 4790K
5.2
Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

Value

Are you paying a premium for performance?
Xeon E5603
n.d.
Core i7 6700K
7.3
Core i7 4790K
8.4
Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more
9.1

CPUBoss Score

Combination of all six facets
Xeon E5603
4.6
Core i7 6700K
9.1
Core i7 4790K
9.1

Winner
Intel Core i7 6700K 

CPUBoss recommends the Intel Core i7 6700K  based on its performance, single-core performance and value.

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VS

Intel Xeon E5603

Front view of Intel Xeon E5603
Front view of Intel Core i7 6700K

Intel Core i7 6700K

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Differences What are the advantages of each

Front view of Intel Xeon E5603

Reasons to consider the
Intel Xeon E5603

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Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Lower typical power consumption 65W vs 73.94W More than 10% lower typical power consumption
Supports more RAM 294,912 MB vs 65,536 MB Supports 4.5x more RAM
Lower annual home energy cost 19.27 $/year vs 21.92 $/year More than 10% lower annual home energy cost
Lower annual commercial energy cost 70.08 $/year vs 79.72 $/year More than 10% lower annual commercial energy cost
Front view of Intel Core i7 6700K

Reasons to consider the
Intel Core i7 6700K

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Much higher clock speed 4 GHz vs 1.6 GHz Around 2.5x higher clock speed
Much newer manufacturing process 14 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much better PassMark (Single core) score 2,349 vs 672 Around 3.5x better PassMark (Single core) score
Much better overclocked clock speed (Air) 4.61 GHz vs 1.6 GHz Around 3x better overclocked clock speed (Air)
Much better PassMark score 11,109 vs 2,362 Around 4.8x better PassMark score
More l3 cache 8 MB vs 4 MB 2x more l3 cache; more data can be stored in the l3 cache for quick access later
Much better performance per dollar 0.91 pt/$ vs 0.47 pt/$ More than 90% better performance per dollar
Significantly more l3 cache per core 2 MB/core vs 1 MB/core 2x more l3 cache per core
Newer Jul, 2015 vs Feb, 2011 Release date over 4 years later
More threads 8 vs 4 Twice as many threads
Better performance per watt 3.49 pt/W vs 1.15 pt/W More than 3x better performance per watt
Much better overclocked clock speed (Water) 4.77 GHz vs 1.6 GHz Around 3x better overclocked clock speed (Water)

Benchmarks Real world tests of Xeon E5603 vs Core i7 6700K

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon E5603
6,774
Core i7 6700K
17,583

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon E5603
1,201
Core i7 6700K
4,510

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E5603
797.85 MB/s
Core i7 6700K
6,010 MB/s

PassMark Data courtesy Passmark

Xeon E5603
2,362
Core i7 6700K
11,109

PassMark (Single Core)

Xeon E5603
672
Core i7 6700K
2,349

Specifications Full list of technical specs

summary

 Xeon E5603  vs
Core i7 6700K 
Clock speed 1.6 GHz 4 GHz
Cores Quad core Quad core

features
Has a NX bit Yes Yes
Supports trusted computing Yes No
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
AVX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
AVX 2.0
Supports dynamic frequency scaling Yes Yes

power consumption
TDP 80W 91W
Annual home energy cost 19.27 $/year 21.92 $/year
Annual commercial energy cost 70.08 $/year 79.72 $/year
Performance per watt 1.15 pt/W 3.49 pt/W
Typical power consumption 65W 73.94W

bus
Architecture QPI FSB
Number of links 2 0
Transfer rate 4,800 MT/s 8,000 MT/s

details

 Xeon E5603  vs
Core i7 6700K 
Architecture x86-64 x86-64
Threads 4 8
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 4 MB 8 MB
L3 cache per core 1 MB/core 2 MB/core
Manufacture process 32 nm 14 nm
Max CPUs 2 1

overclocking
Overclocked clock speed 1.6 GHz 4.61 GHz
Overclocked clock speed (Water) 1.6 GHz 4.77 GHz
Overclocked clock speed (Air) 1.6 GHz 4.61 GHz

integrated graphics
GPU None GPU
Label N/A Intel® HD Graphics 530
Number of displays supported N/A 3
GPU clock speed N/A 350 MHz
Turbo clock speed N/A 1,150 MHz

memory controller
Memory controller Built-in Built-in
Memory type
DDR3L-1600
DDR3-1066
DDR3-800
DDR3
Channels Triple Channel Dual Channel
Supports ECC Yes No
Maximum bandwidth 25,599.99 MB/s 25,600 MB/s
Maximum memory size 294,912 MB 65,536 MB
Intel Xeon E5603
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Intel Core i7 6700K
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