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Intel i5-655K vs i3-2120

The Intel Core i3-2120 @ 3.30GHz is newer than Intel Core i5-655K @ 3.20GHz however both CPUs have comparable multi-threaded (CPU Mark) and single-thread rating. Also, Intel Core i5-655K @ 3.20GHz uses around 12% more power. All the CPUs in this comparison belong in the Desktop CPU Class. The values below were tabulated from a combined 4923 benchmarks submitted from our PerformanceTest software and results and are updated daily to include new submissions.

  • The first section will show basic information for each CPU selected.
  • The additional graphs shows the CPU Mark and Single Thread values of each CPU selected.
  • An accompany graph, if price data is available, will shows the value for money, in terms of the CPU Mark/Thread Rating per dollar.
  • The last section will show approximate yearly running costs for the CPUs.

×Intel Core i5-655K @ 3.20GHz×Intel Core i3-2120 @ 3.30GHz+ ADD
Price Search Online $60 - BUY
Socket TypeLGA1156LGA1155
CPU ClassDesktopDesktop
Clockspeed3.2 GHz3.3 GHz
Turbo SpeedUp to 3.5 GHzNot Supported
# of Physical Cores2 (Threads: 4)2 (Threads: 4)
CacheL1: 256KB, L2: 1.0MB, L3: 4MBL1: 128KB, L2: 0.5MB, L3: 3MB
TDP73W65W
Yearly Running Cost$13.32$11.86
Other
First Seen on ChartQ2 2010Q1 2011
# of Samples464877
CPU Value26.232.7
Single Thread Rating(% diff. to max in group)1446(-4.2%)1509(0.0%)
CPU Mark(% diff. to max in group)2017(0.0%)1963(-2.7%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 23rd of April 2025 - Higher results represent better performance
Intel Core i5-655K @ 3.20GHz
2,017
Intel Core i3-2120 @ 3.30GHz
1,963
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 23rd of April 2025 - Higher results represent better value
Intel Core i5-655K @ 3.20GHz
26.2
Intel Core i3-2120 @ 3.30GHz
32.7
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 23rd of April 2025 - Higher results represent better performance
Intel Core i5-655K @ 3.20GHz
1,446
Intel Core i3-2120 @ 3.30GHz
1,509
PassMark Software © 2008-2025
Estimated Energy Usage Cost
Estimated Energy Adjustable Values
Average hours of use per day Average CPU Utilization (0-100%)1 Power cost, $ per kWh2
8
25
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.
Intel Core i5-655K @ 3.20GHz Intel Core i3-2120 @ 3.30GHz
Max TDP73W65W
Power consumption per day (kWh)NANA
Running cost per dayNANA
Power consumption per year (kWh)NANA
Running cost per yearNANA
Shown CPU power usage is based on linear interpolation of Max TDP (i.e. max load). Actual CPU power profile may vary.