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Differences What are the advantages of each

Front view of AMD Phenom II X2 550

Reasons to consider the
AMD Phenom II X2 550

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Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Higher clock speed 3.1 GHz vs 2.8 GHz More than 10% higher clock speed
Better overclocked clock speed (Air) 3.81 GHz vs 3.67 GHz Around 5% better overclocked clock speed (Air)
Better overclocked clock speed (Water) 3.12 GHz vs 2.8 GHz More than 10% better overclocked clock speed (Water)
Front view of AMD Athlon II X2 240

Reasons to consider the
AMD Athlon II X2 240

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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 lower typical power consumption 52.81W vs 124.5W 2.4x 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 performance per watt 1.67 pt/W vs 0.89 pt/W More than 85% better performance per watt
Much more l2 cache per core 1 MB/core vs 0.5 MB/core 2x more l2 cache per core
Much lower annual home energy cost 15.66 $/year vs 46.25 $/year 3x lower annual home energy cost
Significantly higher Maximum operating temperature 74 °C vs 70 °C More than 5% higher Maximum operating temperature
Much lower annual commercial energy cost 56.94 $/year vs 120.89 $/year 2.1x lower annual commercial energy cost

Benchmarks Real world tests of Phenom II X2 550 vs Athlon II X2 240

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

Phenom II X2 550
125,000 MB/s
Athlon II X2 240
112,300 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench (64-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Phenom II X2 550  vs
Athlon II X2 240 
Clock speed 3.1 GHz 2.8 GHz
Cores Dual core Dual core
Socket type
AM3
Is unlocked Yes No

features

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

power consumption

TDP 80W 65W
Annual home energy cost 46.25 $/year 15.66 $/year
Annual commercial energy cost 120.89 $/year 56.94 $/year
Performance per watt 0.89 pt/W 1.67 pt/W
Typical power consumption 124.5W 52.81W

bus

Clock speed 2,000 MHz 2,000 MHz

details

Phenom II X2 550  vs
Athlon II X2 240 
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 6 MB 1 MB
L3 cache per core 3 MB/core 0.5 MB/core
Manufacture process 45 nm 32 nm
Max CPUs 1 1
Operating temperature Unknown - 70°C Unknown - 74°C

overclocking

Overclock popularity 7 23
Overclocked clock speed 3.81 GHz 3.67 GHz
Overclocked clock speed (Water) 3.12 GHz 2.8 GHz
PassMark (Overclocked) 1,881.5 2,103.5
Overclocked clock speed (Air) 3.81 GHz 3.67 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 Phenom II X2 550
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AMD Athlon II X2 240
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