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Differences What are the advantages of each

Front view of Intel Core i7 880

Reasons to consider the
Intel Core i7 880

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More cores 4 vs 2 Twice as many cores; run more applications at once
Front view of Intel Core i5 650

Reasons to consider the
Intel Core i5 650

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Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much more l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Higher clock speed 3.2 GHz vs 3.06 GHz Around 5% higher clock speed
Significantly lower typical power consumption 100.22W vs 123.55W Around 20% lower typical power consumption
Significantly better overclocked clock speed (Air) 4.31 GHz vs 4.05 GHz More than 5% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 5.08 GHz vs 3.06 GHz More than 65% better overclocked clock speed (Water)
Much lower annual commercial energy cost 96.89 $/year vs 126.14 $/year Around 25% lower annual commercial energy cost
Lower annual home energy cost 37.54 $/year vs 41.57 $/year Around 10% lower annual home energy cost

Benchmarks Real world tests of Core i7 880 vs i5 650

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Core i7 880
8,338
Core i5 650
4,709

GeekBench 3 (Single core) Data courtesy Primate Labs

Core i7 880
2,238
Core i5 650
2,168

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core i7 880
147,950 MB/s
Core i5 650
1,550,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Core i7 880
8,248
Core i5 650
4,675

GeekBench

Core i7 880
8,597
Core i5 650
6,669

Cinebench R10 32-Bit

Core i7 880
17,436
Core i5 650
10,550

PassMark Data courtesy Passmark

Core i7 880
5,684
Core i5 650
3,116

PassMark (Single Core)

Core i7 880
1,347
Core i5 650
1,319

Specifications Full list of technical specs

summary

Core i7 880  vs
i5 650 
Clock speed 3.06 GHz 3.2 GHz
Turbo clock speed 3.73 GHz 3.46 GHz
Cores Quad core Dual core
Socket type
LGA 1156
Is unlocked No No

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 95W 73W
Annual home energy cost 41.57 $/year 37.54 $/year
Annual commercial energy cost 126.14 $/year 96.89 $/year
Performance per watt 1.45 pt/W 4.67 pt/W
Idle power consumption 62.2W 69.1W
Peak power consumption 144W 110.6W
Typical power consumption 123.55W 100.22W

bus

Architecture DMI DMI
Number of links 1 1
Transfer rate 2,500 MT/s 2,500 MT/s

details

Core i7 880  vs
i5 650 
Architecture x86-64 x86-64
Threads 8 4
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
L3 cache 8 MB 4 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 45 nm 32 nm
Transistor count 774,000,000 382,000,000
Max CPUs 1 1
Clock multiplier 23 24
Voltage range 0.65 - 1.4V 0.65 - 1.4V
Operating temperature Unknown - 72.7°C Unknown - 72.6°C

overclocking

Overclocked clock speed 4.05 GHz 4.31 GHz
Overclocked clock speed (Water) 3.06 GHz 5.08 GHz
Overclocked clock speed (Air) 4.05 GHz 4.31 GHz

integrated graphics

GPU None GPU
Label N/A Intel® HD Graphics
Number of displays supported N/A 2
GPU clock speed N/A 733 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3
Channels Dual Channel Dual Channel
Maximum bandwidth 21,333.32 MB/s 21,333.32 MB/s
Maximum memory size 16,384 MB 16,773.12 MB
Intel Core i7 880
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Intel Core i5 650
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