CPUBoss Review Our evaluation of 840 vs 1407 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 Pentium 840

Reasons to consider the
Intel Pentium 840

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Significantly 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
Higher clock speed 3.2 GHz vs 2.8 GHz Around 15% higher clock speed
Much better overclocked clock speed (Air) 4.29 GHz vs 2.8 GHz Around 55% better overclocked clock speed (Air)
Much more l2 cache per core 1 MB/core vs 0.5 MB/core 2x more l2 cache per core
More threads 4 vs 2 Twice as many threads
Better overclocked clock speed (Water) 3.2 GHz vs 2.8 GHz Around 15% better overclocked clock speed (Water)
Front view of Intel Pentium 1407

Reasons to consider the
Intel Pentium 1407

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Much newer manufacturing process 32 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much lower typical power consumption 65W vs 105.63W Around 40% lower typical power consumption
Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Much better geekbench 3 single core score 2,182 vs 881 Around 2.5x better geekbench 3 single core score
Significantly better geekbench 3 Multi-Core score 3,754 vs 1,544 Around 2.5x better geekbench 3 Multi-Core score
Newer May, 2012 vs May, 2005 Release date over 7 years later
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Much lower annual home energy cost 19.27 $/year vs 31.32 $/year Around 40% lower annual home energy cost
Much lower annual commercial energy cost 70.08 $/year vs 113.88 $/year Around 40% lower annual commercial energy cost

Benchmarks Real world tests of Pentium 840 vs 1407

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

Pentium 840
114,300 MB/s
Pentium 1407
1,950 MB/s

Specifications Full list of technical specs

summary

Pentium 840  vs
1407 
Clock speed 3.2 GHz 2.8 GHz
Cores Dual core Dual core

features

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

power consumption

TDP 130W 80W
Annual home energy cost 31.32 $/year 19.27 $/year
Annual commercial energy cost 113.88 $/year 70.08 $/year
Performance per watt 0.78 pt/W 1.13 pt/W
Typical power consumption 105.63W 65W

bus

Architecture FSB QPI
Number of links 1 1
Clock speed 800 MHz 0 MHz

details

Pentium 840  vs
1407 
Architecture x86-64 x86-64
Threads 4 2
L2 cache 2 MB 1 MB
L2 cache per core 1 MB/core 0.5 MB/core
Manufacture process 90 nm 32 nm
Max CPUs 1 1
Voltage range 1.2 - 1.4V 0.6 - 1.35V

overclocking

Overclocked clock speed 4.29 GHz 2.8 GHz
Overclocked clock speed (Water) 3.2 GHz 2.8 GHz
Overclocked clock speed (Air) 4.29 GHz 2.8 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
Supports ECC No Yes
Intel Pentium 840
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Intel Pentium 1407
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