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Differences What are the advantages of each

Front view of Intel Pentium G2020

Reasons to consider the
Intel Pentium G2020

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Much newer manufacturing process 22 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Significantly higher clock speed 2.9 GHz vs 2.1 GHz Around 40% higher clock speed
Significantly better geekbench 3 single core score 2,132 vs 1,060 More than 2x better geekbench 3 single core score
Significantly better overclocked clock speed (Air) 3.03 GHz vs 2.2 GHz Around 40% better overclocked clock speed (Air)
More l3 cache per core 1.5 MB/core vs 1 MB/core 50% more l3 cache per core
Significantly better overclocked clock speed (Water) 3.1 GHz vs 2.2 GHz More than 40% better overclocked clock speed (Water)
Front view of AMD Opteron 4171 HE

Reasons to consider the
AMD Opteron 4171 HE

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Much more l2 cache 3 MB vs 1 MB 3x more l2 cache; more data can be stored in the l2 cache for quick access later
More cores 6 vs 2 Three times as many cores; run more applications at once
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
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 threads 6 vs 2 Three times as many threads
Slightly lower typical power consumption 40.63W vs 44.69W Around 10% lower typical power consumption
Slightly lower annual commercial energy cost 43.8 $/year vs 48.18 $/year Around 10% lower annual commercial energy cost
Slightly lower annual home energy cost 12.04 $/year vs 13.25 $/year Around 10% lower annual home energy cost

Benchmarks Real world tests of Pentium G2020 vs Opteron 4171 HE

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 G2020
151,400 MB/s
Opteron 4171 HE
79,700 MB/s

Specifications Full list of technical specs

summary

Pentium G2020  vs
Opteron 4171 HE 
Clock speed 2.9 GHz 2.1 GHz
Cores Dual core Hexa core
Socket type
LGA 1155
C32

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE4
SSE3
SSE
SSE4.1
SSE4.2
3DNow!
Supplemental SSE3

bus

Architecture DMI HyperTransport 3.0

details

Pentium G2020  vs
Opteron 4171 HE 
Threads 2 6
L2 cache 1 MB 3 MB
L2 cache per core 0.5 MB/core 0.5 MB/core
L3 cache 3 MB 6 MB
L3 cache per core 1.5 MB/core 1 MB/core
Manufacture process 22 nm 45 nm
Max CPUs 1 2
Clock multiplier 29 10

overclocking

Overclocked clock speed 3.03 GHz 2.2 GHz
Overclocked clock speed (Water) 3.1 GHz 2.2 GHz
Overclocked clock speed (Air) 3.03 GHz 2.2 GHz

power consumption

TDP 55W 50W
Annual home energy cost 13.25 $/year 12.04 $/year
Annual commercial energy cost 48.18 $/year 43.8 $/year
Performance per watt 2.11 pt/W 2.14 pt/W
Typical power consumption 44.69W 40.63W
Intel Pentium G2020
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AMD Opteron 4171 HE
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