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Differences What are the advantages of each

Front view of AMD Phenom X4 9850

Reasons to consider the
AMD Phenom X4 9850

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Much more l3 cache 2 MB vs 0 MB Compared to all cpus, 2 MB l3 cache is just OK
Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
More cores 4 vs 2 Twice as many cores; run more applications at once
More threads 4 vs 2 Twice as many threads
Much more l3 cache per core 0.5 MB/core vs 0 MB/core Compared to all cpus, 0.5 MB/core l3 cache per core is just OK
Front view of AMD Athlon II X2 250

Reasons to consider the
AMD Athlon II X2 250

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Much newer manufacturing process 32 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Significantly higher clock speed 3 GHz vs 2.5 GHz 20% higher clock speed
Much better performance per watt 1.79 pt/W vs 0.96 pt/W More than 85% better performance per watt
Much lower typical power consumption 52.81W vs 101.56W Around 50% lower typical power consumption
Much better overclocked clock speed (Air) 3.72 GHz vs 2.72 GHz More than 35% better overclocked clock speed (Air)
Much higher Maximum operating temperature 74 °C vs 61 °C More than 20% higher Maximum operating temperature
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 30.11 $/year Around 50% lower annual home energy cost
Much lower annual commercial energy cost 56.94 $/year vs 109.5 $/year Around 50% lower annual commercial energy cost
Much better overclocked clock speed (Water) 4.04 GHz vs 2.88 GHz More than 40% better overclocked clock speed (Water)
Newer Jun, 2009 vs Jul, 2008 Release date 11 months later

Benchmarks Real world tests of Phenom X4 9850 vs Athlon 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

Phenom X4 9850
97,500 MB/s
Athlon II X2 250
120,700 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench (64-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Reviews Word on the street

Specifications Full list of technical specs

summary

Phenom X4 9850  vs
Athlon II X2 250 
Clock speed 2.5 GHz 3 GHz
Cores Quad core Dual core
Socket type
AM2+
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
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 125W 65W
Annual home energy cost 30.11 $/year 15.66 $/year
Annual commercial energy cost 109.5 $/year 56.94 $/year
Performance per watt 0.96 pt/W 1.79 pt/W
Typical power consumption 101.56W 52.81W

bus

Clock speed 2,000 MHz 2,000 MHz

details

Phenom X4 9850  vs
Athlon II X2 250 
Architecture x86-64 x86-64
Threads 4 2
L2 cache 2 MB 2 MB
L2 cache per core 0.5 MB/core 1 MB/core
L3 cache 2 MB 0 MB
L3 cache per core 0.5 MB/core 0 MB/core
Manufacture process 65 nm 32 nm
Max CPUs 1 1
Voltage range 1.05 - 1.3V 0.85 - 1.43V
Operating temperature Unknown - 61°C Unknown - 74°C

overclocking

Overclocked clock speed 2.72 GHz 3.72 GHz
Overclocked clock speed (Water) 2.88 GHz 4.04 GHz
Overclocked clock speed (Air) 2.72 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 Phenom X4 9850
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AMD Athlon II X2 250
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