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Differences What are the advantages of each

Front view of AMD Athlon X2 4450B

Reasons to consider the
AMD Athlon X2 4450B

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Much more l3 cache 0.5 MB vs 0 MB Compared to all cpus, 0.5 MB l3 cache is just OK
Much more l3 cache per core 0.25 MB/core vs 0 MB/core Compared to all cpus, 0.25 MB/core l3 cache per core is just OK
Significantly lower typical power consumption 36.56W vs 52.81W More than 30% lower typical power consumption
Significantly higher Maximum operating temperature 78 °C vs 74 °C More than 5% higher Maximum operating temperature
Significantly lower annual home energy cost 10.84 $/year vs 15.66 $/year More than 30% lower annual home energy cost
Significantly lower annual commercial energy cost 39.42 $/year vs 56.94 $/year More than 30% lower annual commercial energy cost
Front view of AMD Athlon II X2 250

Reasons to consider the
AMD Athlon II X2 250

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Much 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 newer manufacturing process 32 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much higher clock speed 3 GHz vs 2.3 GHz More than 30% higher clock speed
Much better PassMark score 1,750 vs 1,170 Around 50% better PassMark score
Much better PassMark (Single core) score 1,008 vs 692 More than 45% better PassMark (Single core) score
Much better geekbench 2 (32-bit) score 2,690 vs 1,720 More than 55% better geekbench 2 (32-bit) score
Much better overclocked clock speed (Air) 3.72 GHz vs 3 GHz Around 25% better overclocked clock speed (Air)
Much more l2 cache per core 1 MB/core vs 0.5 MB/core 2x more l2 cache per core
Much better overclocked clock speed (Water) 4.04 GHz vs 2.58 GHz More than 55% better overclocked clock speed (Water)
Newer Jun, 2009 vs Apr, 2008 Release date over 1 years later

Benchmarks Real world tests of Athlon X2 4450B vs II X2 250

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

Athlon X2 4450B
63,200 MB/s
Athlon II X2 250
120,700 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Athlon X2 4450B  vs
II X2 250 
Clock speed 2.3 GHz 3 GHz
Cores Dual core Dual core
Socket type
AM2+
AM3
Is unlocked No No

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
AVX 1.1
SSE2
F16C
MMX
XOP
AVX
SSE3
SSE
BMI1
AMD64
SSE4.1
FMA4
FMA3
SSE4.2
ABM
CVT16
AMD-V
3DNow!
Supplemental SSE3
AES
TBM
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 45W 65W
Annual home energy cost 10.84 $/year 15.66 $/year
Annual commercial energy cost 39.42 $/year 56.94 $/year
Performance per watt 1.58 pt/W 1.79 pt/W
Typical power consumption 36.56W 52.81W

details

Athlon X2 4450B  vs
II X2 250 
Architecture x86-64 x86-64
Threads 2 2
L2 cache 1 MB 2 MB
L2 cache per core 0.5 MB/core 1 MB/core
L3 cache 0.5 MB 0 MB
L3 cache per core 0.25 MB/core 0 MB/core
Manufacture process 65 nm 32 nm
Max CPUs 1 1
Operating temperature Unknown - 78°C Unknown - 74°C

overclocking

Overclocked clock speed 3 GHz 3.72 GHz
Overclocked clock speed (Water) 2.58 GHz 4.04 GHz
Overclocked clock speed (Air) 3 GHz 3.72 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
AMD Athlon X2 4450B
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AMD Athlon II X2 250
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