CPUBoss Review Our evaluation of L5420 vs E8400 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

Intel Xeon L5420

CPUBoss Winner
Front view of Intel Xeon L5420

Differences What are the advantages of each

Front view of Intel Xeon L5420

Reasons to consider the
Intel Xeon L5420

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Much more l2 cache 12 MB vs 6 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Better geekbench 3 Multi-Core score 4,968 vs 2,982 More than 65% better geekbench 3 Multi-Core score
Lower typical power consumption 40.63W vs 52.81W Around 25% lower typical power consumption
Significantly better performance per dollar 0.33 pt/$ vs 0.01 pt/$ Around 28.2x better performance per dollar
More cores 4 vs 2 Twice as many cores; run more applications at once
More threads 4 vs 2 Twice as many threads
Better performance per watt 2.75 pt/W vs 1.83 pt/W More than 50% better performance per watt
Lower annual home energy cost 12.04 $/year vs 15.66 $/year Around 25% lower annual home energy cost
Lower annual commercial energy cost 43.8 $/year vs 56.94 $/year Around 25% lower annual commercial energy cost
Newer Mar, 2008 vs Jan, 2008 Release date 2 months later
Front view of Intel Core2 Duo E8400

Reasons to consider the
Intel Core2 Duo E8400

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Higher clock speed 3 GHz vs 2.5 GHz 20% higher clock speed
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Significantly higher Maximum operating temperature 72.4 °C vs 57 °C More than 25% higher Maximum operating temperature
Better overclocked clock speed (Air) 4.22 GHz vs 3.67 GHz More than 15% better overclocked clock speed (Air)
Better PassMark (Single core) score 1,251 vs 1,043 Around 20% better PassMark (Single core) score
Better overclocked clock speed (Water) 4.23 GHz vs 3.85 GHz Around 10% better overclocked clock speed (Water)

Benchmarks Real world tests of Xeon L5420 vs Core2 Duo E8400

GeekBench 3 (Multi-core) Data courtesy Primate Labs

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon L5420
107,200 MB/s
Core2 Duo E8400
128,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench (64-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon L5420  vs
Core2 Duo E8400 
Clock speed 2.5 GHz 3 GHz
Cores Quad core Dual core
Socket type
LGA 771
LGA 775

features

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

power consumption

TDP 50W 65W
Annual home energy cost 12.04 $/year 15.66 $/year
Annual commercial energy cost 43.8 $/year 56.94 $/year
Performance per watt 2.75 pt/W 1.83 pt/W
Typical power consumption 40.63W 52.81W

bus

Architecture FSB FSB
Number of links 1 1
Clock speed 1,333 MHz 1,333 MHz

details

Xeon L5420  vs
Core2 Duo E8400 
Architecture x86-64 x86-64
Threads 4 2
L2 cache 12 MB 6 MB
L2 cache per core 3 MB/core 3 MB/core
Manufacture process 45 nm 45 nm
Transistor count 820,000,000 410,000,000
Max CPUs 2 1
Clock multiplier 7 9
Voltage range 0.85 - 1.35V 0.85 - 1.36V
Operating temperature Unknown - 57°C Unknown - 72.4°C

overclocking

Overclocked clock speed 3.67 GHz 4.22 GHz
Overclocked clock speed (Water) 3.85 GHz 4.23 GHz
Overclocked clock speed (Air) 3.67 GHz 4.22 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
Intel Xeon L5420
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Intel Core2 Duo E8400
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