CPUBoss Review Our evaluation of 3040 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

Differences What are the advantages of each

Front view of Intel Xeon 3040

Reasons to consider the
Intel Xeon 3040

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Significantly better performance per dollar 0.32 pt/$ vs 0.01 pt/$ Around 27.5x better performance per dollar
Front view of Intel Core2 Duo E8400

Reasons to consider the
Intel Core2 Duo E8400

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Much more l2 cache 6 MB vs 2 MB 3x more l2 cache; more data can be stored in the l2 cache for quick access later
Significantly higher clock speed 3 GHz vs 1.86 GHz More than 60% higher clock speed
Much newer manufacturing process 45 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much more l2 cache per core 3 MB/core vs 1 MB/core 3x more l2 cache per core
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Much better overclocked clock speed (Air) 4.22 GHz vs 2.88 GHz More than 45% better overclocked clock speed (Air)
Better PassMark (Single core) score 1,251 vs 743 Around 70% better PassMark (Single core) score
Higher Maximum operating temperature 72.4 °C vs 61.4 °C Around 20% higher Maximum operating temperature
Better performance per watt 1.83 pt/W vs 0.83 pt/W Around 2.2x better performance per watt
Better overclocked clock speed (Water) 4.23 GHz vs 3.56 GHz Around 20% better overclocked clock speed (Water)

Benchmarks Real world tests of Xeon 3040 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 3040
95.9 MB/s
Core2 Duo E8400
128,000 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon 3040  vs
Core2 Duo E8400 
Clock speed 1.86 GHz 3 GHz
Cores Dual core Dual core
Socket type
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 65W 65W
Annual home energy cost 15.66 $/year 15.66 $/year
Annual commercial energy cost 56.94 $/year 56.94 $/year
Performance per watt 0.83 pt/W 1.83 pt/W
Typical power consumption 52.81W 52.81W

bus

Architecture FSB FSB
Number of links 1 1
Clock speed 1,066 MHz 1,333 MHz

details

Xeon 3040  vs
Core2 Duo E8400 
Architecture x86-64 x86-64
Threads 2 2
L2 cache 2 MB 6 MB
L2 cache per core 1 MB/core 3 MB/core
Manufacture process 65 nm 45 nm
Transistor count 167,000,000 410,000,000
Max CPUs 1 1
Clock multiplier 7 9
Voltage range 0.85 - 1.5V 0.85 - 1.36V
Operating temperature Unknown - 61.4°C Unknown - 72.4°C

overclocking

Overclocked clock speed 2.88 GHz 4.22 GHz
Overclocked clock speed (Water) 3.56 GHz 4.23 GHz
Overclocked clock speed (Air) 2.88 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 3040
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Intel Core2 Duo E8400
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