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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

CPU Performance Comparison

Performance of selected CPUs can be found below. The values for the CPU are determined from thousands of PerformanceTest benchmark results and is updated daily.


AMD Athlon II X4 638 Quad-CoreAMD Phenom 9550 Quad-Core
Price$26.491$28.991
Socket TypeFM1AM2+
CPU ClassDesktopDesktop
Clockspeed2.7 GHz2.2 GHz
Turbo SpeedNot SupportedNot Supported
# of Physical Cores44
Max TDP65W95W
Yearly Running Cost$11.86$17.34
First Seen on ChartQ2 2015Q4 2008
# of Samples3456
Single Thread Rating924760
CPU Mark31982544
CPU Mark Rating
As of 18th of October 2019 - Higher results represent better performance
AMD Athlon II X4 638 Quad-Core
 3,198
AMD Phenom 9550 Quad-Core
 2,544
PassMark Software © 2008-2019
CPU Value (CPU Mark / $Price)
As of 18th of October 2019 - Higher results represent better value
AMD Athlon II X4 638 Quad-Core
 120.73
AMD Phenom 9550 Quad-Core
 87.76
PassMark Software © 2008-2019
CPU Single Thread Rating
As of 18th of October 2019 - Higher results represent better performance
AMD Athlon II X4 638 Quad-Core
 924
AMD Phenom 9550 Quad-Core
 760
PassMark Software © 2008-2019

Estimated Energy Usage Cost
Estimated Energy Adjustable Values
Average hours of use per dayAverage CPU Utilization (0-100%)1Power cost, $ per kWh2
1Average user usage is typically low and can vary from task to task. An estimate load 25% is nominal.
2Typical power costs vary around the world. Check your last power bill for details. Values of $0.15 to $0.45 per kWh are typical.
AMD Athlon II X4 638 Quad-CoreAMD Phenom 9550 Quad-Core
Max TDP65W95W
Power consumption per day (kWh)abcabc
Running cost per dayabcabc
Power consumption per year (kWh)abcabc
Running cost per yearabcabc
Shown CPU power usage is based on linear interpolation of Max TDP (i.e. max load). Actual CPU power profile may vary.