CPUBoss Review Our evaluation of E5503 vs 2600K 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

7.6

CPUBoss Score

Combination of all six facets

Winner
Intel Core i7 2600K 

CPUBoss recommends the Intel Core i7 2600K  based on its performance, single-core performance and value.

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Front view of Intel Core i7 2600K

Intel Core i7 2600K

CPUBoss Winner

Differences What are the advantages of each

Front view of Intel Xeon E5503

Reasons to consider the
Intel Xeon E5503

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Much lower typical power consumption 65W vs 114.2W Around 45% lower typical power consumption
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Much lower annual home energy cost 19.27 $/year vs 41.8 $/year 2.2x lower annual home energy cost
Much lower annual commercial energy cost 70.08 $/year vs 111.78 $/year More than 35% lower annual commercial energy cost
Supports more RAM 147,456 MB vs 32,768 MB Supports 4.5x more RAM
Slightly higher Maximum operating temperature 76 °C vs 72.6 °C Around 5% higher Maximum operating temperature
Front view of Intel Core i7 2600K

Reasons to consider the
Intel Core i7 2600K

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Much higher clock speed 3.4 GHz vs 2 GHz 70% higher clock speed
Much better performance per dollar 2.92 pt/$ vs 0.39 pt/$ Around 7.5x better performance per dollar
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better PassMark (Single core) score 1,920 vs 808 Around 2.5x better PassMark (Single core) 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
Significantly better PassMark score 8,494 vs 1,383 Around 6.2x better PassMark score
Much better performance per watt 7.53 pt/W vs 0.96 pt/W More than 7.8x better performance per watt
Much better overclocked clock speed (Air) 5.05 GHz vs 3.3 GHz Around 55% better overclocked clock speed (Air)
More threads 8 vs 2 6 more threads
More cores 4 vs 2 Twice as many cores; run more applications at once
Much better overclocked clock speed (Water) 4.76 GHz vs 3.33 GHz Around 45% better overclocked clock speed (Water)
Newer Jan, 2011 vs Mar, 2010 Release date 9 months later

Benchmarks Real world tests of Xeon E5503 vs Core i7 2600K

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon E5503
4,704
Core i7 2600K
11,563

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E5503
86.2 MB/s
Core i7 2600K
2,500,000 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon E5503  vs
Core i7 2600K 
Clock speed 2 GHz 3.4 GHz
Cores Dual core Quad core
Socket type
LGA 1366
LGA 1155

features

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

power consumption

TDP 80W 95W
Annual home energy cost 19.27 $/year 41.8 $/year
Annual commercial energy cost 70.08 $/year 111.78 $/year
Performance per watt 0.96 pt/W 7.53 pt/W
Typical power consumption 65W 114.2W

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3-800
DDR3
Channels Triple Channel Dual Channel
Supports ECC Yes No
Maximum bandwidth 19,200 MB/s 21,333.32 MB/s
Maximum memory size 147,456 MB 32,768 MB

details

Xeon E5503  vs
Core i7 2600K 
Architecture x86-64 x86-64
Threads 2 8
L2 cache 1 MB 1 MB
L2 cache per core 0.5 MB/core 0.25 MB/core
L3 cache 4 MB 8 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 45 nm 32 nm
Max CPUs 2 1
Clock multiplier 15 34
Voltage range 0.75 - 1.35V 0.85 - 1.45V
Operating temperature Unknown - 76°C Unknown - 72.6°C

overclocking

Overclocked clock speed 3.3 GHz 5.05 GHz
Overclocked clock speed (Water) 3.33 GHz 4.76 GHz
Overclocked clock speed (Air) 3.3 GHz 5.05 GHz

integrated graphics

GPU None GPU
Label N/A Intel® HD Graphics 3000
Latest DirectX N/A 10.x
Number of displays supported N/A 2
GPU clock speed N/A 850 MHz
Turbo clock speed N/A 1,350 MHz
3DMark06 N/A 5,275

bus

Architecture QPI DMI
Number of links 2 1
Transfer rate 4,800 MT/s 5,000 MT/s
Intel Xeon E5503
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Intel Core i7 2600K
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