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Differences What are the advantages of each

Front view of Intel Pentium G645

Reasons to consider the
Intel Pentium G645

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Much newer manufacturing process 32 nm vs 130 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Higher clock speed 2.9 GHz vs 2.2 GHz More than 30% higher clock speed
Newer Sep, 2012 vs Nov, 2003 Release date over 8 years later
Significantly better geekbench 3 single core score 2,017 vs 972 More than 2x better geekbench 3 single core score
Significantly better geekbench 3 Multi-Core score 3,656 vs 958 More than 3.8x better geekbench 3 Multi-Core score
Significantly lower typical power consumption 52.81W vs 72.31W More than 25% lower typical power consumption
Better overclocked clock speed (Air) 3 GHz vs 2.4 GHz Around 25% better overclocked clock speed (Air)
More cores 2 vs 1 Twice as many cores; run more applications at once
Better performance per watt 2.37 pt/W vs 1.15 pt/W More than 2x better performance per watt
Significantly better overclocked clock speed (Water) 3.09 GHz vs 2.2 GHz More than 40% better overclocked clock speed (Water)
Significantly lower annual home energy cost 15.66 $/year vs 21.44 $/year More than 25% lower annual home energy cost
Significantly lower annual commercial energy cost 56.94 $/year vs 77.96 $/year More than 25% lower annual commercial energy cost
Front view of AMD Opteron 848

Reasons to consider the
AMD Opteron 848

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Supports more CPUs in SMP configuration 8 vs 1 7 supports more CPUs in SMP configuration
Much more l2 cache per core 1 MB/core vs 0.5 MB/core 2x more l2 cache per core

Benchmarks Real world tests of Pentium G645 vs Opteron 848

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 G645
143,500 MB/s
Opteron 848
123,000 MB/s

Specifications Full list of technical specs

summary

Pentium G645  vs
Opteron 848 
Clock speed 2.9 GHz 2.2 GHz
Cores Dual core Single core
Socket type
LGA 1155
940

features

Has a NX bit Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
SSE3
SSE
SSE4.1
SSE4.2
3DNow!
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

details

Pentium G645  vs
Opteron 848 
Threads 2 1
L2 cache 1 MB 1 MB
L2 cache per core 0.5 MB/core 1 MB/core
Manufacture process 32 nm 130 nm
Max CPUs 1 8
Clock multiplier 29 11
Operating temperature Unknown - 69.1°C 0 - 71°C

overclocking

Overclocked clock speed 3 GHz 2.4 GHz
Overclocked clock speed (Water) 3.09 GHz 2.2 GHz
Overclocked clock speed (Air) 3 GHz 2.4 GHz

power consumption

TDP 65W 89W
Annual home energy cost 15.66 $/year 21.44 $/year
Annual commercial energy cost 56.94 $/year 77.96 $/year
Performance per watt 2.37 pt/W 1.15 pt/W
Typical power consumption 52.81W 72.31W
Intel Pentium G645
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AMD Opteron 848
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