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Differences What are the advantages of each

Front view of AMD Athlon II X4 631

Reasons to consider the
AMD Athlon II X4 631

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Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
More threads 4 vs 2 Twice as many threads
Much better overclocked clock speed (Air) 4.03 GHz vs 3.64 GHz More than 10% better overclocked clock speed (Air)
Newer Jan, 2012 vs Jul, 2009 Release date over 2 years later
Front view of AMD Athlon II X2 245

Reasons to consider the
AMD Athlon II X2 245

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Much more l3 cache 1 MB vs 0 MB Compared to all cpus, 1 MB l3 cache is just OK
Higher clock speed 2.9 GHz vs 2.6 GHz More than 10% higher clock speed
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
Much lower typical power consumption 52.81W vs 81.25W 35% lower typical power consumption
Significantly higher Maximum operating temperature 74 °C vs 70.1 °C More than 5% higher Maximum operating temperature
Much better overclocked clock speed (Water) 4 GHz vs 2.6 GHz Around 55% better overclocked clock speed (Water)
Much lower annual home energy cost 15.66 $/year vs 24.09 $/year 35% lower annual home energy cost
Much lower annual commercial energy cost 56.94 $/year vs 87.6 $/year 35% lower annual commercial energy cost

Benchmarks Real world tests of Athlon II X4 631 vs X2 245

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 II X4 631
109,100 MB/s
Athlon II X2 245
116,550 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench

3D Mark 11 (Physics)

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Athlon II X4 631  vs
X2 245 
Clock speed 2.6 GHz 2.9 GHz
Cores Dual core Dual core
Socket type
FM1
AM3
Is unlocked No No

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE3
SSE
AMD64
AMD-V
3DNow!
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 100W 65W
Annual home energy cost 24.09 $/year 15.66 $/year
Annual commercial energy cost 87.6 $/year 56.94 $/year
Performance per watt 1.32 pt/W 1.73 pt/W
Typical power consumption 81.25W 52.81W

details

Athlon II X4 631  vs
X2 245 
Architecture x86-64 x86-64
Threads 4 2
L2 cache 4 MB 2 MB
L2 cache per core 2 MB/core 1 MB/core
L3 cache 0 MB 1 MB
L3 cache per core 0 MB/core 0.5 MB/core
Manufacture process 32 nm 45 nm
Max CPUs 1 1
Voltage range 0.45 - 1.41V 0.85 - 1.4V
Operating temperature Unknown - 70.1°C Unknown - 74°C

overclocking

Overclocked clock speed 4.03 GHz 3.64 GHz
Overclocked clock speed (Water) 2.6 GHz 4 GHz
Overclocked clock speed (Air) 4.03 GHz 3.64 GHz

integrated graphics

GPU GPU None
Label AMD Radeon Aug 15, 2011 N/A
AMD Athlon II X4 631
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AMD Athlon II X2 245
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