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 645	AMD Phenom II X4 840
Price	$79.95 BUY NOW!	$89.95¹
Socket Type	AM3	AM2+/AM3
CPU Class	Desktop	Desktop
Clockspeed	3.1 GHz	3.2 GHz
Turbo Speed	Not Supported	Not Supported
# of Physical Cores	4	4
Max TDP	95W	95W
Yearly Running Cost	$17.34	$17.34
First Seen on Chart	Q4 2010	Q1 2011
# of Samples	526	630
Single Thread Rating	1071	1099
CPU Mark	3468	3507

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

CPU Mark Rating
As of 24th of August 2019 - Higher results represent better performance
AMD Athlon II X4 645	3,468
AMD Phenom II X4 840	3,507
Intel Core i9-9900K @ 3.60GHz	20,220
AMD Ryzen 7 2700X	16,959
Intel Core i7-8700K @ 3.70GHz	15,963
Intel Core i7-8700 @ 3.20GHz	15,161
AMD Ryzen 7 1700X	14,683
PassMark Software © 2008-2019

CPU Value (CPU Mark / $Price)
As of 24th of August 2019 - Higher results represent better value
AMD Athlon II X4 645	43.38
AMD Phenom II X4 840	39.00
Intel Core i9-9900K @ 3.60GHz	42.21
AMD Ryzen 7 2700X	68.14
Intel Core i7-8700K @ 3.70GHz	45.61
Intel Core i7-8700 @ 3.20GHz	42.12
AMD Ryzen 7 1700X	89.56
PassMark Software © 2008-2019

CPU Single Thread Rating
As of 24th of August 2019 - Higher results represent better performance
AMD Athlon II X4 645	1,071
AMD Phenom II X4 840	1,099
Intel Core i9-9900K @ 3.60GHz	2,898
AMD Ryzen 7 2700X	2,190
Intel Core i7-8700K @ 3.70GHz	2,701
Intel Core i7-8700 @ 3.20GHz	2,631
AMD Ryzen 7 1700X	1,881
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 645	AMD Phenom II X4 840
Max TDP	95W	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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