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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

AMD Athlon II X4 638 Quad-Core vs AMD Athlon II X4 645

The values for the CPUs below are determined from thousands of PerformanceTest benchmark results and are updated daily.

×AMD Athlon II X4 638 Quad-Core×AMD Athlon II X4 645+ ADD
Price$26.491$34.95
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Socket TypeFM1AM3
CPU ClassDesktopDesktop
Clockspeed2.7 GHz3.1 GHz
Turbo SpeedNot SupportedNot Supported
# of Physical Cores4 (Threads: 4)4 (Threads: 4)
Max TDP65W95W
Yearly Running Cost$11.86$17.34
First Seen on ChartQ2 2015Q4 2010
# of Samples3550
Cross-Platform Rating04202
Single Thread Rating11761216
CPU Mark20302089
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 28th of May 2020 - Higher results represent better performance
AMD Athlon II X4 638 Quad-Core
2,030
AMD Athlon II X4 645
2,089
CPU Value (CPU Mark / $Price)
As of 28th of May 2020 - Higher results represent better value
AMD Athlon II X4 638 Quad-Core
76.64
AMD Athlon II X4 645
59.77
CPU Single Thread Rating
As of 28th of May 2020 - Higher results represent better performance
AMD Athlon II X4 638 Quad-Core
1,176
AMD Athlon II X4 645
1,216

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 Athlon II X4 645
Max TDP65W95W
Power consumption per day (kWh)abcabc
Running cost per dayabcabc
Power consumption per year (kWh)abcabc
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Shown CPU power usage is based on linear interpolation of Max TDP (i.e. max load). Actual CPU power profile may vary.