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AMD Athlon II X4 645 vs A8-5600K APU

The AMD A8-5600K APU is newer than AMD Athlon II X4 645 and is around 21% faster in multi-threaded (CPU Mark) testing. The AMD A8-5600K APU is around 14% faster in single-thread testing. Both CPUs operates at simliar power levels (TDP). All the CPUs in this comparison belong in the Desktop CPU Class. The values below were tabulated from a combined 1737 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×AMD A8-5600K APU+ ADD
Price $59.99 - BUY $69.01 - BUY
Socket TypeAM3FM2
CPU ClassDesktopDesktop
Clockspeed3.1 GHz3.6 GHz
Turbo SpeedNot SupportedUp to 3.9 GHz
# of Physical Cores4 (Threads: 4)4 (in 4 physical modules)
CacheL1: 512KB, L2: 2.0MB, L1: 320KB, L2: 8.0MB,
TDP95W100W
Yearly Running Cost$17.34$18.25
Other
First Seen on ChartQ4 2010Q4 2012
# of Samples6211116
CPU Value39.641.5
Single Thread Rating(% diff. to max in group)1259(-11.9%)1429(0.0%)
CPU Mark(% diff. to max in group)2373(-17.1%)2863(0.0%)

CPU Mark Rating
As of 22nd of April 2025 - Higher results represent better performance
AMD Athlon II X4 645
2,373
AMD A8-5600K APU
2,863
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 22nd of April 2025 - Higher results represent better value
AMD Athlon II X4 645
39.6
AMD A8-5600K APU
41.5
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 22nd of April 2025 - Higher results represent better performance
AMD Athlon II X4 645
1,259
AMD A8-5600K APU
1,429
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 AMD A8-5600K APU
Max TDP95W100W
Power consumption per day (kWh)0.190.20
Running cost per day$0.048$0.050
Power consumption per year (kWh)69.373.0
Running cost per year$17.34$18.25
Shown CPU power usage is based on linear interpolation of Max TDP (i.e. max load). Actual CPU power profile may vary.