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Differences What are the advantages of each

Front view of Intel Core2 Duo T5800

Reasons to consider the
Intel Core2 Duo T5800

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Much better 3DMark06 CPU score 1,639.5 vs 65 Around 25.2x better 3DMark06 CPU score
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 more l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core
Significantly lower typical power consumption 28.44W vs 52.81W More than 45% lower typical power consumption
Significantly lower annual home energy cost 8.43 $/year vs 15.66 $/year More than 45% lower annual home energy cost
Significantly lower annual commercial energy cost 30.66 $/year vs 56.94 $/year More than 45% lower annual commercial energy cost
Front view of Intel Core i5 6500

Reasons to consider the
Intel Core i5 6500

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Much newer manufacturing process 14 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Significantly higher clock speed 3.2 GHz vs 2 GHz More than 60% higher clock speed
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Much better PassMark (Single core) score 1,951 vs 677 Around 3x better PassMark (Single core) score
Significantly better PassMark score 7,217 vs 1,112 Around 6.5x better PassMark score
Much better overclocked clock speed (Air) 3.77 GHz vs 2.16 GHz Around 75% better overclocked clock speed (Air)
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Newer Jul, 2015 vs Oct, 2008 Release date over 6 years later
More cores 4 vs 2 Twice as many cores; run more applications at once
Better performance per watt 3.9 pt/W vs 2.25 pt/W Around 75% better performance per watt
Much better overclocked clock speed (Water) 4.29 GHz vs 2 GHz Around 2.2x better overclocked clock speed (Water)
More threads 4 vs 2 Twice as many threads

Benchmarks Real world tests of Core2 Duo T5800 vs Core i5 6500

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

Core2 Duo T5800
84,400 MB/s
Core i5 6500
5,880 MB/s

3D Mark 06 (CPU)

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core2 Duo T5800  vs
Core i5 6500 
Clock speed 2 GHz 3.2 GHz
Cores Dual core Quad core

features

Has a NX bit Yes Yes
Supports trusted computing No Yes
Has virtualization support No Yes
Instruction set extensions
SSE2
MMX
SSE4
AVX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
AVX 2.0
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 35W 65W
Annual home energy cost 8.43 $/year 15.66 $/year
Annual commercial energy cost 30.66 $/year 56.94 $/year
Performance per watt 2.25 pt/W 3.9 pt/W
Typical power consumption 28.44W 52.81W

details

Core2 Duo T5800  vs
Core i5 6500 
Architecture x86-64 x86-64
Threads 2 4
L2 cache 2 MB 1 MB
L2 cache per core 1 MB/core 0.25 MB/core
Manufacture process 65 nm 14 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 2.16 GHz 3.77 GHz
Overclocked clock speed (Water) 2 GHz 4.29 GHz
Overclocked clock speed (Air) 2.16 GHz 3.77 GHz

integrated graphics

GPU None GPU
Label N/A Intel® HD Graphics 530
Number of displays supported N/A 3
GPU clock speed N/A 350 MHz
Turbo clock speed N/A 1,050 MHz

bus

Architecture FSB FSB
Number of links 1 1
Intel Core2 Duo T5800
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Intel Core i5 6500
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