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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 and has comparable multi-threaded (CPU Mark) and single-thread rating. However, 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 4896 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 Samples464850
CPU Value26.232.7
Single Thread Rating(% diff. to max in group)1446(-4.3%)1510(0.0%)
CPU Mark(% diff. to max in group)2017(0.0%)1964(-2.6%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 2nd of April 2025 - Higher results represent better performance
Intel Core i5-655K @ 3.20GHz
2,017
Intel Core i3-2120 @ 3.30GHz
1,964
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 2nd 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 2nd of April 2025 - Higher results represent better performance
Intel Core i5-655K @ 3.20GHz
1,446
Intel Core i3-2120 @ 3.30GHz
1,510
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)0.150.13
Running cost per day$0.036$0.033
Power consumption per year (kWh)53.347.5
Running cost per year$13.32$11.86
Shown CPU power usage is based on linear interpolation of Max TDP (i.e. max load). Actual CPU power profile may vary.