CPUBoss Review Our evaluation of 550 vs 255 among desktop CPUs

Performance

Benchmark performance using all cores

PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

Single-core Performance

Individual core benchmark performance

PassMark (Single Core), Geekbench 3 Single Core and 1 more

Integrated Graphics

Integrated GPU performance for graphics

Fire Strike

Integrated Graphics (OpenCL)

Integrated GPU performance for parallel computing

CompuBench 1.5 Bitcoin mining and 4 more

Performance per Watt

How efficiently does the processor use electricity?

Fire Strike, CompuBench 1.5 Bitcoin mining and 11 more

Value

Are you paying a premium for performance?

Fire Strike, CompuBench 1.5 Bitcoin mining and 11 more

No winner declared

Too close to call

Cast your vote Do you agree or disagree with CPUBoss?

Thanks for adding your opinion. Follow us on Facebook to stay up to date with the latest news!
VS

Differences What are the advantages of each

Front view of AMD Phenom II X2 550

Reasons to consider the
AMD Phenom II X2 550

Report a correction
Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Front view of AMD Athlon II X2 255

Reasons to consider the
AMD Athlon II X2 255

Report a correction
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 more l2 cache per core 1 MB/core vs 0.5 MB/core 2x more l2 cache per core
Significantly higher Maximum operating temperature 74 °C vs 70 °C More than 5% higher Maximum operating temperature
Lower typical power consumption 116.42W vs 124.5W More than 5% lower typical power consumption
Much better overclocked clock speed (Water) 3.93 GHz vs 3.12 GHz More than 25% better overclocked clock speed (Water)
Lower annual home energy cost 42.79 $/year vs 46.25 $/year More than 5% lower annual home energy cost
Lower annual commercial energy cost 113.7 $/year vs 120.89 $/year More than 5% lower annual commercial energy cost

Benchmarks Real world tests of Phenom II X2 550 vs Athlon II X2 255

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 255
125,000 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 255 
Clock speed 3.1 GHz 3.1 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
SSE2
MMX
SSE3
SSE
3DNow!
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 80W 65W
Annual home energy cost 46.25 $/year 42.79 $/year
Annual commercial energy cost 120.89 $/year 113.7 $/year
Performance per watt 0.89 pt/W 0.8 pt/W
Idle power consumption 84W 76.3W
Peak power consumption 138W 129.8W
Typical power consumption 124.5W 116.42W

details

Phenom II X2 550  vs
Athlon II X2 255 
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 45 nm
Max CPUs 1 1
Voltage range 0.85 - 1.43V 0.85 - 1.4V
Operating temperature Unknown - 70°C Unknown - 74°C

overclocking

Overclocked clock speed 3.81 GHz 3.8 GHz
Overclocked clock speed (Water) 3.12 GHz 3.93 GHz
PassMark (Overclocked) 1,881.5 1,567.5
Overclocked clock speed (Air) 3.81 GHz 3.8 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

bus

Clock speed 2,000 MHz 2,000 MHz
AMD Phenom II X2 550
Report a correction
AMD Athlon II X2 255
Report a correction

Comments

comments powered by Disqus