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 Phenom II X4 955	Intel Core2 Quad Q8400 @ 2.66GHz
Price	$130.16¹	$239.95¹
Socket Type	AM3	LGA775
CPU Class	Desktop	Desktop
Clockspeed	3.2 GHz	2.7 GHz
Turbo Speed	Not Supported	Not Supported
# of Physical Cores	4	4
Max TDP	125W	95W
Yearly Running Cost	$22.81	$17.34
First Seen on Chart	Q1 2009	Q2 2009
# of Samples	3489	1322
Single Thread Rating	1109	1120
CPU Mark	3926	3162

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

CPU Mark Rating
As of 26th of May 2019 - Higher results represent better performance
AMD Phenom II X4 955	3,926
Intel Core2 Quad Q8400 @ 2.66GHz	3,162
Intel Core i9-9900K @ 3.60GHz	20,205
AMD Ryzen 7 2700X	16,981
Intel Core i7-8700K @ 3.70GHz	15,963
Intel Core i7-8700 @ 3.20GHz	15,149
AMD Ryzen 7 1700	13,767
PassMark Software © 2008-2019

CPU Value (CPU Mark / $Price)
As of 26th of May 2019 - Higher results represent better value
AMD Phenom II X4 955	30.17
Intel Core2 Quad Q8400 @ 2.66GHz	13.18
Intel Core i9-9900K @ 3.60GHz	41.66
AMD Ryzen 7 2700X	59.58
Intel Core i7-8700K @ 3.70GHz	44.34
Intel Core i7-8700 @ 3.20GHz	50.50
AMD Ryzen 7 1700	80.74
PassMark Software © 2008-2019

CPU Single Thread Rating
As of 26th of May 2019 - Higher results represent better performance
AMD Phenom II X4 955	1,109
Intel Core2 Quad Q8400 @ 2.66GHz	1,120
Intel Core i9-9900K @ 3.60GHz	2,901
AMD Ryzen 7 2700X	2,192
Intel Core i7-8700K @ 3.70GHz	2,702
Intel Core i7-8700 @ 3.20GHz	2,630
AMD Ryzen 7 1700	1,775
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 Phenom II X4 955	Intel Core2 Quad Q8400 @ 2.66GHz
Max TDP	125W	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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