iconcharts
2

CPU Benchmarks

Over 1,000,000 CPUs benchmarked

AMD A8-3870K APU vs Phenom II X4 975

The AMD A8-3870K APU is newer than AMD Phenom II X4 975, while AMD Phenom II X4 975 is around 11% faster in multi-threaded (CPU Mark) testing, it is around 10% faster in single-thread testing. However, AMD Phenom II X4 975 uses around 22% more power. All the CPUs in this comparison belong in the Desktop CPU Class.The values below were tabulated from a combined 812 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 A8-3870K APU×AMD Phenom II X4 975+ ADD
Price Search Online Search Online
Socket TypeFM1AM3
CPU ClassDesktopDesktop
Clockspeed3.0 GHz3.6 GHz
Turbo SpeedNot SupportedNot Supported
# of Physical Cores4 (Threads: 4)4 (Threads: 4)
CacheL1: 512KB, L2: 4.0MB, L1: 512KB, L2: 2.0MB, L3: 6MB
TDP100W125W
Yearly Running Cost$18.25$22.81
Other
First Seen on ChartQ4 2011Q1 2011
# of Samples605207
CPU Value34.337.3
Single Thread Rating(% diff. to max in group)1212(-9.8%)1344(0.0%)
CPU Mark(% diff. to max in group)2335(-10.5%)2610(0.0%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 6th of April 2025 - Higher results represent better performance
AMD A8-3870K APU
2,335
AMD Phenom II X4 975
2,610
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 6th of April 2025 - Higher results represent better value
AMD A8-3870K APU
34.3
AMD Phenom II X4 975
37.3
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 6th of April 2025 - Higher results represent better performance
AMD A8-3870K APU
1,212
AMD Phenom II X4 975
1,344
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 A8-3870K APU AMD Phenom II X4 975
Max TDP100W125W
Power consumption per day (kWh)0.200.25
Running cost per day$0.050$0.063
Power consumption per year (kWh)73.091.3
Running cost per year$18.25$22.81
Shown CPU power usage is based on linear interpolation of Max TDP (i.e. max load). Actual CPU power profile may vary.