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Front view of Intel Core i7 870

Intel Core i7 870

CPUBoss Winner

Differences What are the advantages of each

Front view of Intel Xeon L5638

Reasons to consider the
Intel Xeon L5638

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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
Much lower typical power consumption 48.75W vs 121W 2.5x lower typical power consumption
Much newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better geekbench 3 Multi-Core score 15,681 vs 8,046 Around 95% better geekbench 3 Multi-Core score
More l3 cache 12 MB vs 8 MB 50% more l3 cache; more data can be stored in the l3 cache for quick access later
Much better performance per watt 8.43 pt/W vs 1.11 pt/W More than 7.5x better performance per watt
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
More cores 6 vs 4 2 more cores; run more applications at once
Much lower annual home energy cost 14.45 $/year vs 42.57 $/year 2.9x lower annual home energy cost
More threads 12 vs 8 4 more threads
Better performance per dollar 0.88 pt/$ vs 0.66 pt/$ Around 35% better performance per dollar
Higher Maximum operating temperature 85 °C vs 72.7 °C More than 15% higher Maximum operating temperature
Much lower annual commercial energy cost 52.56 $/year vs 120.89 $/year 2.3x lower annual commercial energy cost
More l2 cache per core 0.33 MB/core vs 0.25 MB/core Around 35% more l2 cache per core
Newer Mar, 2010 vs Jul, 2009 Release date 8 months later
Front view of Intel Core i7 870

Reasons to consider the
Intel Core i7 870

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Significantly higher turbo clock speed 3.6 GHz vs 2.4 GHz More than 50% higher turbo clock speed
Significantly higher clock speed 2.93 GHz vs 2 GHz More than 45% higher clock speed
Much better overclocked clock speed (Air) 4.1 GHz vs 2 GHz More than 2x better overclocked clock speed (Air)
Better PassMark (Single core) score 1,300 vs 942 Around 40% better PassMark (Single core) score
Significantly better overclocked clock speed (Water) 4.28 GHz vs 3.03 GHz More than 40% better overclocked clock speed (Water)

Benchmarks Real world tests of Xeon L5638 vs Core i7 870

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon L5638
15,681
Core i7 870
8,046

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon L5638
1,355
Core i7 870
2,243

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon L5638
965,300 MB/s
Core i7 870
142,100 MB/s

PassMark Data courtesy Passmark

Xeon L5638
5,556
Core i7 870
5,398

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon L5638  vs
Core i7 870 
Clock speed 2 GHz 2.93 GHz
Turbo clock speed 2.4 GHz 3.6 GHz
Cores Hexa core Quad core
Socket type
LGA 1366
LGA 1156

features

Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 60W 95W
Annual home energy cost 14.45 $/year 42.57 $/year
Annual commercial energy cost 52.56 $/year 120.89 $/year
Performance per watt 8.43 pt/W 1.11 pt/W
Typical power consumption 48.75W 121W

details

Xeon L5638  vs
Core i7 870 
Threads 12 8
L2 cache 2 MB 1 MB
L2 cache per core 0.33 MB/core 0.25 MB/core
L3 cache 12 MB 8 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 32 nm 45 nm
Max CPUs 2 1
Voltage range 1 - 1.5V 0.65 - 1.4V
Operating temperature Unknown - 85°C Unknown - 72.7°C

overclocking

Overclocked clock speed 2 GHz 4.1 GHz
Overclocked clock speed (Water) 3.03 GHz 4.28 GHz
Overclocked clock speed (Air) 2 GHz 4.1 GHz

integrated graphics

GPU None None
Label N/A N/A
Latest DirectX N/A N/A
Number of displays supported N/A N/A
GPU clock speed N/A N/A
Turbo clock speed N/A N/A
3DMark06 N/A N/A

bus

Architecture QPI DMI
Number of links 2 1
Transfer rate 5,860 MT/s 2,500 MT/s
Intel Xeon L5638
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Intel Core i7 870
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