CPUBoss Review Our evaluation of G640 vs 2500K

Performance

Benchmark performance using all cores

Passmark and GeekBench (32-bit)

Single-core Performance

Individual core benchmark performance

Passmark (Single Core)

Overclocking

How much speed can you get out of the processor?

Passmark (Overclocked), Maximum Overclocked Clock Speed (Air) and 2 more

Value

Are you paying a premium for performance?

Performance Per Dollar

CPUBoss Score

Performance, Single-core Performance, Overclocking and Value

Winner
Intel Core i5 2500K 

CPUBoss recommends the Intel Core i5 2500K  based on its overclocking.

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VS
Front view of Intel Core i5 2500K

Intel Core i5 2500K

CPUBoss Winner

Differences What are the advantages of each

Front view of Intel Pentium G640

Reasons to consider the
Intel Pentium G640

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Much lower typical power consumption 52.81W vs 112.55W 2.1x lower typical power consumption
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Much lower annual home energy cost 15.66 $/year vs 41.29 $/year 2.6x lower annual home energy cost
Marginally newer Jun, 2012 vs Jan, 2011 Release date over 1 years later
Significantly lower annual commercial energy cost 56.94 $/year vs 110.03 $/year Around 50% lower annual commercial energy cost
Front view of Intel Core i5 2500K

Reasons to consider the
Intel Core i5 2500K

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Higher clock speed 3.3 GHz vs 2.8 GHz Around 20% higher clock speed
More l3 cache 6 MB vs 3 MB 2x more l3 cache; more data can be stored in the l3 cache for quick access later
More cores 4 vs 2 Twice as many cores; run more applications at once
Significantly better geekbench (32-bit) score 10,370 vs 3,328 More than 3x better geekbench (32-bit) score
Much better overclocked clock speed (Air) 5.02 GHz vs 2.94 GHz More than 70% better overclocked clock speed (Air)
Significantly better PassMark score 6,383 vs 2,535 More than 2.5x better PassMark score
Better PassMark (Single core) score 1,863 vs 1,435 Around 30% better PassMark (Single core) score
More threads 4 vs 2 Twice as many threads
Significantly better PassMark (Overclocked) score 5,433.6 vs 2,838.2 More than 90% better PassMark (Overclocked) score
Higher Maximum Operating Temperature 72.6 °C vs 69.1 °C More than 5% higher Maximum Operating Temperature
Much better overclocked clock speed (Water) 5.09 GHz vs 2.8 GHz More than 80% better overclocked clock speed (Water)

Benchmarks Real world tests of Pentium G640 vs Core i5 2500K

GeekBench (32-bit)

GeekBench

Passmark

Pentium G640 Core i5 2500K @ cpubenchmark.net

Passmark (Single Core)

Specifications Full list of technical specs

summary

Pentium G640  vs
Core i5 2500K 
Clock speed 2.8 GHz 3.3 GHz
Cores Dual core Quad core
Socket type
LGA 1155
Is hyperthreaded No No

features

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

gpu

GPU GPU GPU
Label Intel® HD Graphics Intel® HD Graphics 3000
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
Channels Dual Channel Dual Channel
Maximum bandwidth 17,066.66 MB/s 21,333.32 MB/s
Maximum memory size 32,768 MB 32,768 MB

details

Pentium G640  vs
Core i5 2500K 
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 nms 32 nms
Max CPUs 1 1
Clock multiplier 28 33
Operating temperature Unknown - 69.1°C 5 - 72.6°C

overclocking

Overclock popularity 0 3,179
Overclocked clock speed 2.94 GHz 5.02 GHz
Overclocked clock speed (Water) 2.8 GHz 5.09 GHz
PassMark (Overclocked) 2,838.2 5,433.6
Overclocked clock speed (Air) 2.94 GHz 5.02 GHz

power consumption

TDP 65W 95W
Annual home energy cost 15.66 $/year 41.29 $/year
Annual commercial energy cost 56.94 $/year 110.03 $/year
Performance per watt 6.72 pt/W 5.98 pt/W
Typical power consumption 52.81W 112.55W

bus

Architecture DMI DMI
Number of links 1 1
Transfer rate 5,000 MT/s 5,000 MT/s
Intel Pentium G640
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Intel Core i5 2500K
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