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-Core	AMD Phenom 9550 Quad-Core
Price	$26.49¹	$28.99¹
Socket Type	FM1	AM2+
CPU Class	Desktop	Desktop
Clockspeed	2.7 GHz	2.2 GHz
Turbo Speed	Not Supported	Not Supported
# of Physical Cores	4	4
Max TDP	65W	95W
Yearly Running Cost	$11.86	$17.34
First Seen on Chart	Q2 2015	Q4 2008
# of Samples	3	447
Single Thread Rating	924	760
CPU Mark	3198	2543

¹ - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 23rd of April 2019 - Higher results represent better performance
AMD Athlon II X4 638 Quad-Core	3,198
AMD Phenom 9550 Quad-Core	2,543
Intel Core i9-9900K @ 3.60GHz	20,168
AMD Ryzen 7 2700X	16,984
Intel Core i7-8700K @ 3.70GHz	15,964
Intel Core i7-8700 @ 3.20GHz	15,154
AMD Ryzen 7 1700	13,767
PassMark Software © 2008-2019

CPU Value (CPU Mark / $Price)
As of 23rd of April 2019 - Higher results represent better value
AMD Athlon II X4 638 Quad-Core	120.73
AMD Phenom 9550 Quad-Core	87.73
Intel Core i9-9900K @ 3.60GHz	41.16
AMD Ryzen 7 2700X	58.01
Intel Core i7-8700K @ 3.70GHz	44.35
Intel Core i7-8700 @ 3.20GHz	50.52
AMD Ryzen 7 1700	81.22
PassMark Software © 2008-2019

CPU Single Thread Rating
As of 23rd of April 2019 - Higher results represent better performance
AMD Athlon II X4 638 Quad-Core	924
AMD Phenom 9550 Quad-Core	760
Intel Core i9-9900K @ 3.60GHz	2,899
AMD Ryzen 7 2700X	2,193
Intel Core i7-8700K @ 3.70GHz	2,702
Intel Core i7-8700 @ 3.20GHz	2,630
AMD Ryzen 7 1700	1,776
PassMark Software © 2008-2019

Show other common CPUs in charts

Estimated Energy Usage Cost

Estimated Energy Adjustable Values
Average hours of use per day
Average CPU Utilization (0-100%)¹
Power 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-Core	AMD Phenom 9550 Quad-Core
Max TDP	65W	95W
Power consumption per day (kWh)	abc	abc
Running cost per day	abc	abc
Power consumption per year (kWh)	abc	abc
Running cost per year	abc	abc

Shown CPU power usage is based on linear interpolation of Max TDP (i.e. max load). Actual CPU power profile may vary.

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