CPUBoss Review Our evaluation of L5639 vs 3337U


Benchmark performance using all cores

Passmark and GeekBench

Single-core Performance

Individual core benchmark performance

Passmark (Single Core)

Power Consumption

How much power does the processor require?



Performance Per Dollar

CPUBoss Score

Performance, Single-core Performance, Power Consumption and Value

Intel Xeon L5639 

CPUBoss recommends the Intel Xeon L5639  based on its .

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Intel Xeon L5639

CPUBoss Winner
Front view of Intel Xeon L5639

Differences What are the advantages of each

Front view of Intel Xeon L5639

Reasons to consider the
Intel Xeon L5639

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Higher clock speed 2.13 GHz vs 1.8 GHz Around 20% higher clock speed
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
More cores 6 vs 2 Three times as many cores; run more applications at once
Better geekbench (32-bit) score 9,881 vs 4,136 Around 2.5x better geekbench (32-bit) score
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Better overclocked clock speed (Air) 3.83 GHz vs 2.7 GHz More than 40% better overclocked clock speed (Air)
More threads 12 vs 4 Three times as many threads
Better performance per dollar 4.8 pt/$ vs 1.67 pt/$ Around 3x better performance per dollar
Better PassMark score 5,499 vs 3,161 Around 75% better PassMark score
Better overclocked clock speed (Water) 2.13 GHz vs 1.8 GHz Around 20% better overclocked clock speed (Water)
Front view of Intel Core i5 3337U

Reasons to consider the
Intel Core i5 3337U

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Newer manufacturing process 22 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Lower typical power consumption 13.81W vs 48.75W 3.5x lower typical power consumption
Better PassMark (Single core) score 1,262 vs 914 Around 40% better PassMark (Single core) score
Better performance per watt 22.06 pt/W vs 13.83 pt/W Around 60% better performance per watt
Lower annual home energy cost 4.1 $/year vs 14.45 $/year 3.5x lower annual home energy cost
Lower annual commercial energy cost 14.89 $/year vs 52.56 $/year 3.5x lower annual commercial energy cost

Benchmarks Real world tests of Xeon L5639 vs Core i5 3337U

GeekBench (32-bit)

GeekBench (64-bit)

Xeon L5639


Xeon L5639


Passmark (Single Core)

Specifications Full list of technical specs


Xeon L5639  vs
Core i5 3337U 
Clock speed 2.13 GHz 1.8 GHz
Cores Hexa core Dual core
Socket type
LGA 1366
BGA 1023
Is hyperthreaded Yes Yes


Has a NX bit Yes Yes
Supports trusted computing Yes No
Has virtualization support Yes Yes
Instruction set extensions
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes


Architecture QPI DMI
Number of links 2 1
Transfer rate 5,860 MT/s 5,000 MT/s


Xeon L5639  vs
Core i5 3337U 
Threads 12 4
L2 cache 2 MB 0.5 MB
L2 cache per core 0.33 MB/core 0.25 MB/core
L3 cache 12 MB 3 MB
L3 cache per core 2 MB/core 1.5 MB/core
Manufacture process 32 nm 22 nm
Max CPUs 2 1


Overclocked clock speed 3.83 GHz 2.7 GHz
Overclocked clock speed (Water) 2.13 GHz 1.8 GHz
Overclocked clock speed (Air) 3.83 GHz 2.7 GHz

power consumption

TDP 60W 17W
Annual home energy cost 14.45 $/year 4.1 $/year
Annual commercial energy cost 52.56 $/year 14.89 $/year
Performance per watt 13.83 pt/W 22.06 pt/W
Typical power consumption 48.75W 13.81W
Intel Xeon L5639
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Intel Core i5 3337U
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