CPUBoss Review Our evaluation of L5530 vs E5645 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
Front view of Intel Xeon E5645

Intel Xeon E5645

CPUBoss Winner

Differences What are the advantages of each

Front view of Intel Xeon L5530

Reasons to consider the
Intel Xeon L5530

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Lower typical power consumption 48.75W vs 65W 25% lower typical power consumption
Lower annual commercial energy cost 52.56 $/year vs 70.08 $/year Around 25% lower annual commercial energy cost
Lower annual home energy cost 14.45 $/year vs 19.27 $/year Around 25% lower annual home energy cost
Front view of Intel Xeon E5645

Reasons to consider the
Intel Xeon E5645

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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
Much better PassMark score 6,545 vs 4,351 More than 50% better PassMark score
Much 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
More cores 6 vs 4 2 more cores; run more applications at once
Much better performance per watt 8.49 pt/W vs 2.86 pt/W Around 3x better performance per watt
Much better performance per dollar 1.2 pt/$ vs 0.22 pt/$ Around 5.5x better performance per dollar
Much better overclocked clock speed (Air) 3.39 GHz vs 2.4 GHz More than 40% better overclocked clock speed (Air)
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
More threads 12 vs 8 4 more threads
Supports more RAM 294,912 MB vs 147,456 MB Supports 2x more RAM
Newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
More l2 cache per core 0.33 MB/core vs 0.25 MB/core Around 35% more l2 cache per core
Newer Mar, 2010 vs Aug, 2009 Release date 7 months later

Benchmarks Real world tests of Xeon L5530 vs E5645

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon L5530
11,832
Xeon E5645
20,172

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon L5530
2,962
Xeon E5645
1,968

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon L5530
189.1 MB/s
Xeon E5645
1,340,000 MB/s

PassMark Data courtesy Passmark

Xeon L5530
4,351
Xeon E5645
6,545

PassMark (Single Core)

Xeon L5530
1,018
Xeon E5645
1,083

Specifications Full list of technical specs

summary

Xeon L5530  vs
E5645 
Clock speed 2.4 GHz 2.4 GHz
Turbo clock speed 2.66 GHz 2.67 GHz
Cores Quad core Hexa core
Socket type
LGA 1366

features

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

power consumption

TDP 60W 80W
Annual home energy cost 14.45 $/year 19.27 $/year
Annual commercial energy cost 52.56 $/year 70.08 $/year
Performance per watt 2.86 pt/W 8.49 pt/W
Typical power consumption 48.75W 65W

bus

Architecture QPI QPI
Number of links 2 2
Data rate 46,928 MB/s 46,928 MB/s
Transfer rate 5,860 MT/s 5,860 MT/s
Clock speed 2,930 MHz 2,930 MHz

details

Xeon L5530  vs
E5645 
Architecture x86-64 x86-64
Threads 8 12
L2 cache 1 MB 2 MB
L2 cache per core 0.25 MB/core 0.33 MB/core
L3 cache 8 MB 12 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 45 nm 32 nm
Max CPUs 2 2
Voltage range 0.75 - 1.35V 0.75 - 1.35V
Operating temperature Unknown - 70°C Unknown - 76.2°C

overclocking

Overclocked clock speed 2.4 GHz 3.39 GHz
Overclocked clock speed (Water) 2.4 GHz 2.4 GHz
Overclocked clock speed (Air) 2.4 GHz 3.39 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

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3-800
DDR3
Channels Triple Channel Triple Channel
Supports ECC Yes Yes
Maximum bandwidth 25,599.99 MB/s 31,999.98 MB/s
Maximum memory size 147,456 MB 294,912 MB
Intel Xeon L5530
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Intel Xeon E5645
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