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Differences What are the advantages of each

Front view of Intel Pentium G850

Reasons to consider the
Intel Pentium G850

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Significantly higher clock speed 2.9 GHz vs 2.5 GHz More than 15% higher clock speed
Much better overclocked clock speed (Air) 3.05 GHz vs 2.5 GHz More than 20% better overclocked clock speed (Air)
Significantly higher Maximum operating temperature 69.1 °C vs 65 °C More than 5% higher Maximum operating temperature
Significantly better overclocked clock speed (Water) 2.9 GHz vs 2.5 GHz More than 15% better overclocked clock speed (Water)
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 72.05W 2.5x lower typical power consumption
Much lower annual home energy cost 8.43 $/year vs 27.79 $/year 3.3x lower annual home energy cost
Much lower annual commercial energy cost 30.66 $/year vs 68.5 $/year 2.2x lower annual commercial energy cost
Newer Sep, 2012 vs Apr, 2011 Release date over 1 years later

Benchmarks Real world tests of Pentium G850 vs G645T

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 G850
143,900 MB/s
Pentium G645T
124,300 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 G850  vs
G645T 
Clock speed 2.9 GHz 2.5 GHz
Cores Dual core Dual core
Socket type
LGA 1155

features

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

power consumption

TDP 65W 35W
Annual home energy cost 27.79 $/year 8.43 $/year
Annual commercial energy cost 68.5 $/year 30.66 $/year
Performance per watt 1.99 pt/W 3.81 pt/W
Typical power consumption 72.05W 28.44W

bus

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

details

Pentium G850  vs
G645T 
Architecture x86-64 x86-64
Threads 2 2
L2 cache 1 MB 1 MB
L2 cache per core 0.5 MB/core 0.5 MB/core
L3 cache 3 MB 3 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 29 25
Operating temperature Unknown - 69.1°C Unknown - 65°C

overclocking

Overclocked clock speed 3.05 GHz 2.5 GHz
Overclocked clock speed (Water) 2.9 GHz 2.5 GHz
Overclocked clock speed (Air) 3.05 GHz 2.5 GHz

integrated graphics

GPU GPU GPU
Label Intel® HD Graphics Intel® HD Graphics
Number of displays supported 2 2
GPU clock speed 850 MHz 650 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 17,066.66 MB/s
Maximum memory size 32,768 MB 32,768 MB
Intel Pentium G850
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Intel Pentium G645T
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