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Differences What are the advantages of each

Front view of AMD Athlon II X4 645

Reasons to consider the
AMD Athlon II X4 645

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Much newer manufacturing process 45 nm vs 180 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much more l2 cache 2 MB vs 0.5 MB 4x more l2 cache; more data can be stored in the l2 cache for quick access later
Much higher clock speed 3.1 GHz vs 0.75 GHz Around 4.2x higher clock speed
More cores 4 vs 1 3 more cores; run more applications at once
More threads 4 vs 1 3 more threads
Has a NX bit Yes vs No Somewhat common; Prevents a common class of security exploits
Newer Sep, 2010 vs Nov, 1999 Release date over 10 years later
Front view of AMD Athlon 750

Reasons to consider the
AMD Athlon 750

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CPUBoss is not aware of any important advantages of the Athlon 750 vs the Athlon II X4 645.

Features Key features of the Athlon II X4 645  vs 750 

clock speed

Athlon 750
0.75 GHz

L2 cache

Specifications Full list of technical specs

summary

Athlon II X4 645  vs
750 
Clock speed 3.1 GHz 0.75 GHz
Cores Quad core Single core
Socket type
AM3
Slot A

features

Has a NX bit Yes No
Instruction set extensions
SSE4a
SSE2
MMX
SSE3
SSE
3DNow!

details

Athlon II X4 645  vs
750 
Threads 4 1
L2 cache 2 MB 0.5 MB
L2 cache per core 0.5 MB/core 0.5 MB/core
Manufacture process 45 nm 180 nm
Max CPUs 1 1

power consumption

Typical power consumption 122.78W N/A

bus

Clock speed 2,000 MHz 200 MHz
AMD Athlon II X4 645
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AMD Athlon 750
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