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Differences What are the advantages of each

Front view of Intel Pentium G645T

Reasons to consider the
Intel Pentium G645T

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Much lower typical power consumption 28.44W vs 77.19W 2.7x lower typical power consumption
Much more l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Much lower annual commercial energy cost 30.66 $/year vs 83.22 $/year 2.7x lower annual commercial energy cost
Much lower annual home energy cost 8.43 $/year vs 22.89 $/year 2.7x lower annual home energy cost
Newer Sep, 2012 vs Jan, 2011 Release date over 1 years later
Front view of Intel Core i5 2500

Reasons to consider the
Intel Core i5 2500

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Much higher clock speed 3.3 GHz vs 2.5 GHz More than 30% 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
Much better overclocked clock speed (Air) 3.7 GHz vs 2.5 GHz Around 50% better overclocked clock speed (Air)
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Much higher Maximum operating temperature 72.6 °C vs 65 °C More than 10% higher Maximum operating temperature
Much better overclocked clock speed (Water) 4.21 GHz vs 2.5 GHz Around 70% better overclocked clock speed (Water)

Benchmarks Real world tests of Pentium G645T vs Core i5 2500

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 G645T
124,300 MB/s
Core i5 2500
2,410,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Pentium G645T  vs
Core i5 2500 
Clock speed 2.5 GHz 3.3 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 35W 95W
Annual home energy cost 8.43 $/year 22.89 $/year
Annual commercial energy cost 30.66 $/year 83.22 $/year
Performance per watt 3.81 pt/W 9.04 pt/W
Typical power consumption 28.44W 77.19W

bus

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

details

Pentium G645T  vs
Core i5 2500 
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 25 33
Operating temperature Unknown - 65°C Unknown - 72.6°C

overclocking

Overclocked clock speed 2.5 GHz 3.7 GHz
Overclocked clock speed (Water) 2.5 GHz 4.21 GHz
Overclocked clock speed (Air) 2.5 GHz 3.7 GHz

integrated graphics

GPU GPU GPU
Label Intel® HD Graphics Intel® HD Graphics 2000
Number of displays supported 2 2
GPU clock speed 650 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 17,066.66 MB/s 21,333.32 MB/s
Maximum memory size 32,768 MB 32,768 MB
Intel Pentium G645T
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Intel Core i5 2500
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