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Intel Core i7 920XM

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 Front view of Intel Core i7 920XM
Front view of AMD Phenom II X4 840T

AMD Phenom II X4 840T

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Differences What are the advantages of each

Front view of Intel Core i7 920XM

Reasons to consider the
Intel Core i7 920XM

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Much lower typical power consumption 44.69W vs 77.19W More than 40% lower typical power consumption
Significantly better geekbench 3 Multi-Core score 7,749 vs 5,244 Around 50% better geekbench 3 Multi-Core score
Slightly more l3 cache 8 MB vs 6 MB Around 35% more l3 cache; more data can be stored in the l3 cache for quick access later
Better geekbench 3 single core score 2,195 vs 1,571 Around 40% better geekbench 3 single core score
More threads 8 vs 4 Twice as many threads
More l3 cache per core 2 MB/core vs 1.5 MB/core Around 35% more l3 cache per core
Better performance per watt 3.33 pt/W vs 1.55 pt/W Around 2.2x better performance per watt
Much lower annual home energy cost 13.25 $/year vs 22.89 $/year More than 40% lower annual home energy cost
Much lower annual commercial energy cost 48.18 $/year vs 83.22 $/year More than 40% lower annual commercial energy cost
Front view of AMD Phenom II X4 840T

Reasons to consider the
AMD Phenom II X4 840T

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Significantly higher clock speed 2.9 GHz vs 2 GHz Around 45% higher clock speed
Significantly more l2 cache 2 MB vs 1 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Better overclocked clock speed (Air) 3.69 GHz vs 3.44 GHz More than 5% better overclocked clock speed (Air)
Significantly better overclocked clock speed (Water) 2.9 GHz vs 2 GHz Around 45% better overclocked clock speed (Water)
Newer Aug, 2010 vs Sep, 2009 Release date 10 months later

Benchmarks Real world tests of Core i7 920XM vs Phenom II X4 840T

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Core i7 920XM
7,749
Phenom II X4 840T
5,244

GeekBench 3 (Single core) Data courtesy Primate Labs

Core i7 920XM
2,195
Phenom II X4 840T
1,571

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core i7 920XM
148,800 MB/s
Phenom II X4 840T
120,800 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Core i7 920XM
7,122
Phenom II X4 840T
4,994

GeekBench

Core i7 920XM
7,658
Phenom II X4 840T
5,608

PassMark Data courtesy Passmark

Core i7 920XM
3,818
Phenom II X4 840T
3,617

PassMark (Single Core)

Core i7 920XM
1,065
Phenom II X4 840T
1,038

Specifications Full list of technical specs

summary

 Core i7 920XM  vs
Phenom II X4 840T 
Clock speed 2 GHz 2.9 GHz
Cores Quad core Quad core

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
Supports dynamic frequency scaling Yes Yes

details

 Core i7 920XM  vs
Phenom II X4 840T 
Threads 8 4
L2 cache 1 MB 2 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
L3 cache 8 MB 6 MB
L3 cache per core 2 MB/core 1.5 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 1 1

overclocking
Overclocked clock speed 3.44 GHz 3.69 GHz
Overclocked clock speed (Water) 2 GHz 2.9 GHz
Overclocked clock speed (Air) 3.44 GHz 3.69 GHz

power consumption
TDP 55W 95W
Annual home energy cost 13.25 $/year 22.89 $/year
Annual commercial energy cost 48.18 $/year 83.22 $/year
Performance per watt 3.33 pt/W 1.55 pt/W
Typical power consumption 44.69W 77.19W
Intel Core i7 920XM
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AMD Phenom II X4 840T
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