CPUBoss Review Our evaluation of E8400 vs 2100 among desktop CPUs (45 to 75W)

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

Fire Strike

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?

Fire Strike, CompuBench 1.5 Bitcoin mining and 11 more

Value

Are you paying a premium for performance?

Fire Strike, CompuBench 1.5 Bitcoin mining and 11 more

7.1

CPUBoss Score

Combination of all six facets

Winner
Intel Core i3 2100 

CPUBoss recommends the Intel Core i3 2100  based on its performance and single-core performance.

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VS
Front view of Intel Core i3 2100

Intel Core i3 2100

CPUBoss Winner

Differences What are the advantages of each

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 0.5 MB 12x more l2 cache; more data can be stored in the l2 cache for quick access later
Much better performance per dollar 10.94 pt/$ vs 1.74 pt/$ More than 6.2x better performance per dollar
Much more l2 cache per core 3 MB/core vs 0.25 MB/core 12x more l2 cache per core
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Significantly lower typical power consumption 52.81W vs 98.28W More than 45% lower typical power consumption
Significantly better overclocked clock speed (Air) 4.23 GHz vs 3.22 GHz More than 30% better overclocked clock speed (Air)
Much lower annual home energy cost 15.66 $/year vs 37.88 $/year 2.4x lower annual home energy cost
Significantly better overclocked clock speed (Water) 4.12 GHz vs 3.1 GHz Around 35% better overclocked clock speed (Water)
Significantly lower annual commercial energy cost 56.94 $/year vs 93.47 $/year Around 40% lower annual commercial energy cost
Front view of Intel Core i3 2100

Reasons to consider the
Intel Core i3 2100

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Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much better PassMark (Single core) score 1,581 vs 1,253 More than 25% better PassMark (Single core) score
More threads 4 vs 2 Twice as many threads
Much better cinebench r10 32Bit 1-core score 5,094 vs 3,647 Around 40% better cinebench r10 32Bit 1-core score
Newer Jan, 2011 vs Jan, 2008 Release date over 3 years later

Benchmarks Real world tests of Core2 Duo E8400 vs Core i3 2100

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

Core2 Duo E8400
128,000 MB/s
Core i3 2100
153,100 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench (64-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Reviews Word on the street

Core2 Duo E8400  vs Core i3 2100 

9.1
9.3
Great for HTPC, Games and a bit of Media Encoding, it's a jack of all trades and definitely worth a look for the non enthusiast on a budget.
Core i3 2100

Specifications Full list of technical specs

summary

Core2 Duo E8400  vs
Core i3 2100 
Clock speed 3 GHz 3.1 GHz
Cores Dual core Dual core
Socket type
LGA 775
LGA 1155

features

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

power consumption

TDP 65W 65W
Annual home energy cost 15.66 $/year 37.88 $/year
Annual commercial energy cost 56.94 $/year 93.47 $/year
Performance per watt 1.85 pt/W 1.42 pt/W
Typical power consumption 52.81W 98.28W

details

Core2 Duo E8400  vs
Core i3 2100 
Architecture x86-64 x86-64
Threads 2 4
L2 cache 6 MB 0.5 MB
L2 cache per core 3 MB/core 0.25 MB/core
Manufacture process 45 nm 32 nm
Max CPUs 1 1
Clock multiplier 9 31
Operating temperature Unknown - 72.4°C Unknown - 69.1°C

overclocking

Overclock popularity 125 101
Overclock review score 4.5 4.5
Overclocked clock speed 4.23 GHz 3.22 GHz
Overclocked clock speed (Water) 4.12 GHz 3.1 GHz
Overclocked clock speed (Air) 4.23 GHz 3.22 GHz

integrated graphics

GPU None GPU
Label N/A Intel® HD Graphics 2000
Number of displays supported N/A 2
GPU clock speed N/A 850 MHz
Turbo clock speed N/A 1,100 MHz

bus

Architecture FSB DMI
Number of links 1 1
Intel Core2 Duo E8400
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Intel Core i3 2100
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