CPUBoss Review Our evaluation of L5640 vs 4184 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

5.3

CPUBoss Score

Combination of all six facets

Winner
Intel Xeon L5640 

CPUBoss recommends the Intel Xeon L5640  based on its performance, single-core performance and cost to run.

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VS

Differences What are the advantages of each

Front view of Intel Xeon L5640

Reasons to consider the
Intel Xeon L5640

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Much more l3 cache 12 MB vs 6 MB 2x more l3 cache; more data can be stored in the l3 cache for quick access later
Much better PassMark score 6,451 vs 4,418 More than 45% better PassMark score
Much better performance per watt 10.46 pt/W vs 1.4 pt/W Around 7.5x better performance per watt
More threads 12 vs 6 Twice as many threads
Much better overclocked clock speed (Air) 3.9 GHz vs 2.8 GHz Around 40% better overclocked clock speed (Air)
Significantly lower typical power consumption 48.75W vs 77.19W More than 35% lower typical power consumption
Newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much more l3 cache per core 2 MB/core vs 1 MB/core 2x more l3 cache per core
Significantly lower annual commercial energy cost 52.56 $/year vs 83.22 $/year More than 35% lower annual commercial energy cost
Significantly lower annual home energy cost 14.45 $/year vs 22.89 $/year More than 35% lower annual home energy cost
Front view of AMD Opteron 4184

Reasons to consider the
AMD Opteron 4184

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Much higher clock speed 2.8 GHz vs 2.26 GHz Around 25% higher clock speed
Much more l2 cache 3 MB vs 2 MB 50% more l2 cache; more data can be stored in the l2 cache for quick access later
Significantly more l2 cache per core 0.5 MB/core vs 0.33 MB/core More than 50% more l2 cache per core
Much better overclocked clock speed (Water) 2.8 GHz vs 2.27 GHz Around 25% better overclocked clock speed (Water)

Benchmarks Real world tests of Xeon L5640 vs Opteron 4184

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon L5640
16,852
Opteron 4184
9,801

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon L5640
1,918
Opteron 4184
1,181

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon L5640
1,250,000 MB/s
Opteron 4184
88.4 MB/s

PassMark Data courtesy Passmark

Xeon L5640
6,451
Opteron 4184
4,418

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon L5640  vs
Opteron 4184 
Clock speed 2.26 GHz 2.8 GHz
Cores Hexa core Hexa core
Socket type
LGA 1366
C32

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE4
SSE3
SSE
SSE4.1
SSE4.2
3DNow!
Supplemental SSE3
AES

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

details

Xeon L5640  vs
Opteron 4184 
Threads 12 6
L2 cache 2 MB 3 MB
L2 cache per core 0.33 MB/core 0.5 MB/core
L3 cache 12 MB 6 MB
L3 cache per core 2 MB/core 1 MB/core
Manufacture process 32 nm 45 nm
Max CPUs 2 2
Clock multiplier 17 14
Voltage range 0.75 - 1.35V 1.3 - UnknownV
Operating temperature Unknown - 69.4°C 0 - 55°C

overclocking

Overclocked clock speed 3.9 GHz 2.8 GHz
Overclocked clock speed (Water) 2.27 GHz 2.8 GHz
Overclocked clock speed (Air) 3.9 GHz 2.8 GHz

power consumption

TDP 60W 95W
Annual home energy cost 14.45 $/year 22.89 $/year
Annual commercial energy cost 52.56 $/year 83.22 $/year
Performance per watt 10.46 pt/W 1.4 pt/W
Typical power consumption 48.75W 77.19W

bus

Architecture QPI HyperTransport 3.0
Clock speed 2,930 MHz 2,200 MHz
Intel Xeon L5640
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AMD Opteron 4184
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