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Differences What are the advantages of each

Front view of Intel Pentium G840

Reasons to consider the
Intel Pentium G840

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Much more l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Significantly lower typical power consumption 71.53W vs 93.6W Around 25% lower typical power consumption
Much lower annual commercial energy cost 68.24 $/year vs 100.92 $/year More than 30% lower annual commercial energy cost
Front view of Intel Core i5 2400

Reasons to consider the
Intel Core i5 2400

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Higher clock speed 3.1 GHz vs 2.8 GHz More than 10% higher clock speed
More cores 4 vs 2 Twice as many cores; run more applications at once
More threads 4 vs 2 Twice as many threads
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Much better overclocked clock speed (Air) 3.54 GHz vs 2.93 GHz More than 20% better overclocked clock speed (Air)
Significantly higher Maximum operating temperature 72.6 °C vs 69.1 °C More than 5% higher Maximum operating temperature
Much better overclocked clock speed (Water) 3.51 GHz vs 2.8 GHz More than 25% better overclocked clock speed (Water)

Benchmarks Real world tests of Pentium G840 vs Core i5 2400

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 G840
138,400 MB/s
Core i5 2400
2,260,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench (64-bit) Data courtesy Primate Labs

GeekBench

Pentium G840
4,603
Core i5 2400
10,769

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Pentium G840  vs
Core i5 2400 
Clock speed 2.8 GHz 3.1 GHz
Cores Dual core Quad core
Socket type
LGA 1155

features

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

power consumption

TDP 65W 95W
Annual home energy cost 27.42 $/year 27.75 $/year
Annual commercial energy cost 68.24 $/year 100.92 $/year
Performance per watt 1.93 pt/W 8.14 pt/W
Peak power consumption 77.9W 115.2W
Typical power consumption 71.53W 93.6W

bus

Architecture DMI DMI
Number of links 1 1
Transfer rate 5,000 MT/s 5,000 MT/s

details

Pentium G840  vs
Core i5 2400 
Architecture x86-64 x86-64
Threads 2 4
L2 cache 1 MB 1 MB
L2 cache per core 0.5 MB/core 0.25 MB/core
L3 cache 3 MB 6 MB
L3 cache per core 1.5 MB/core 1.5 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 1 1
Clock multiplier 28 31
Operating temperature Unknown - 69.1°C Unknown - 72.6°C

overclocking

Overclocked clock speed 2.93 GHz 3.54 GHz
Overclocked clock speed (Water) 2.8 GHz 3.51 GHz
Overclocked clock speed (Air) 2.93 GHz 3.54 GHz

integrated graphics

GPU GPU GPU
Label Intel® HD Graphics Intel® HD Graphics 2000
Number of displays supported 2 2
GPU clock speed 850 MHz 850 MHz
Turbo clock speed 1,100 MHz 1,100 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3
Channels Dual Channel Dual Channel
Maximum bandwidth 21,333.32 MB/s 21,333.32 MB/s
Maximum memory size 32,768 MB 32,768 MB
Intel Pentium G840
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Intel Core i5 2400
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