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AMD Athlon II X4 645 vs Intel i3-2100

The Intel Core i3-2100 @ 3.10GHz is newer than AMD Athlon II X4 645, while AMD Athlon II X4 645 is around 22% faster in multi-threaded (CPU Mark) testing, but Intel Core i3-2100 @ 3.10GHz is around 11% faster in single-thread testing. However, AMD Athlon II X4 645 uses around 38% more power. All the CPUs in this comparison belong in the Desktop CPU Class.The values below were tabulated from a combined 4598 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.

×AMD Athlon II X4 645×Intel Core i3-2100 @ 3.10GHz+ ADD
Price $59.99 - BUY $76 - BUY
Socket TypeAM3LGA1155
CPU ClassDesktopDesktop
Clockspeed3.1 GHz3.1 GHz
Turbo SpeedNot SupportedNot Supported
# of Physical Cores4 (Threads: 4)2 (Threads: 4)
CacheL1: 512KB, L2: 2.0MB, L1: 128KB, L2: 0.5MB, L3: 3MB
TDP95W65W
Yearly Running Cost$17.34$11.86
Other
First Seen on ChartQ4 2010Q1 2011
# of Samples6213977
CPU Value39.624.4
Single Thread Rating(% diff. to max in group)1259(-10.9%)1413(0.0%)
CPU Mark(% diff. to max in group)2373(0.0%)1855(-21.9%)

CPU Mark Rating
As of 11th of April 2025 - Higher results represent better performance
AMD Athlon II X4 645
2,373
Intel Core i3-2100 @ 3.10GHz
1,855
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 11th of April 2025 - Higher results represent better value
AMD Athlon II X4 645
39.6
Intel Core i3-2100 @ 3.10GHz
24.4
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 11th of April 2025 - Higher results represent better performance
AMD Athlon II X4 645
1,259
Intel Core i3-2100 @ 3.10GHz
1,413
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.
AMD Athlon II X4 645 Intel Core i3-2100 @ 3.10GHz
Max TDP95W65W
Power consumption per day (kWh)0.190.13
Running cost per day$0.048$0.033
Power consumption per year (kWh)69.347.5
Running cost per year$17.34$11.86
Shown CPU power usage is based on linear interpolation of Max TDP (i.e. max load). Actual CPU power profile may vary.