CPUBoss Review Our evaluation of L5638 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 L5638

Reasons to consider the
Intel Xeon L5638

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Significantly 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
Much lower typical power consumption 48.75W vs 114.2W 2.3x lower typical power consumption
More l3 cache 12 MB vs 8 MB 50% more l3 cache; more data can be stored in the l3 cache for quick access later
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
More cores 6 vs 4 2 more cores; run more applications at once
More threads 12 vs 8 4 more threads
Much lower annual home energy cost 14.45 $/year vs 41.8 $/year 2.9x lower annual home energy cost
Higher Maximum operating temperature 85 °C vs 72.6 °C More than 15% higher Maximum operating temperature
Much lower annual commercial energy cost 52.56 $/year vs 111.78 $/year 2.1x lower annual commercial energy cost
Better performance per watt 8.43 pt/W vs 7.53 pt/W More than 10% better performance per watt
More l2 cache per core 0.33 MB/core vs 0.25 MB/core Around 35% more l2 cache per core
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 higher turbo clock speed 3.8 GHz vs 2.4 GHz Around 60% higher turbo clock speed
Much better performance per dollar 2.92 pt/$ vs 0.88 pt/$ More than 3.2x better performance per dollar
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much better overclocked clock speed (Air) 5.05 GHz vs 2 GHz More than 2.5x better overclocked clock speed (Air)
Significantly better PassMark (Single core) score 1,920 vs 942 More than 2x better PassMark (Single core) score
Better PassMark score 8,494 vs 5,556 Around 55% better PassMark score
Much better overclocked clock speed (Water) 4.76 GHz vs 3.03 GHz More than 55% better overclocked clock speed (Water)
Newer Jan, 2011 vs Mar, 2010 Release date 9 months later

Benchmarks Real world tests of Xeon L5638 vs Core i7 2600K

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon L5638
15,681
Core i7 2600K
11,563

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon L5638
965,300 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 L5638  vs
Core i7 2600K 
Clock speed 2 GHz 3.4 GHz
Turbo clock speed 2.4 GHz 3.8 GHz
Cores Hexa core Quad core
Socket type
LGA 1366
LGA 1155

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
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 60W 95W
Annual home energy cost 14.45 $/year 41.8 $/year
Annual commercial energy cost 52.56 $/year 111.78 $/year
Performance per watt 8.43 pt/W 7.53 pt/W
Typical power consumption 48.75W 114.2W

details

Xeon L5638  vs
Core i7 2600K 
Threads 12 8
L2 cache 2 MB 1 MB
L2 cache per core 0.33 MB/core 0.25 MB/core
L3 cache 12 MB 8 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 2 1
Voltage range 1 - 1.5V 0.85 - 1.45V
Operating temperature Unknown - 85°C Unknown - 72.6°C

overclocking

Overclocked clock speed 2 GHz 5.05 GHz
Overclocked clock speed (Water) 3.03 GHz 4.76 GHz
Overclocked clock speed (Air) 2 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 5,860 MT/s 5,000 MT/s
Intel Xeon L5638
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Intel Core i7 2600K
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