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AMD Phenom II X640 Dual- vs A4-3420 APU

The AMD Phenom II X640 Dual-Core is newer than AMD A4-3420 APU also around 8% faster in multi-threaded (CPU Mark) testing but the CPUs have comparable single-thread rating. However, AMD A4-3420 APU uses around 36% more power. All the CPUs in this comparison belong in the Desktop CPU Class.The values below were tabulated from a combined 113 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 Phenom II X640 Dual-Core×AMD A4-3420 APU+ ADD
Price Search Online Search Online
Socket TypeS1FM1
CPU ClassDesktopDesktop
Clockspeed3.2 GHz2.8 GHz
Turbo SpeedNot SupportedNot Supported
# of Physical Cores2 (Threads: 2)2 (Threads: 2)
CacheL1: 256KB, L2: 2.0MB, L1: 256KB, L2: 1.0MB,
TDP45W65W
Yearly Running Cost$8.21$11.86
Other
First Seen on ChartQ2 2012Q1 2012
# of Samples3110
CPU Value0.07.8
Single Thread Rating(% diff. to max in group)1142(0.0%)11193(-2.0%)
CPU Mark(% diff. to max in group)1165(0.0%)1067(-8.4%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.
3 - Single thread rating may be higher than the overall rating, thread performance is just one component of the CPU Mark.

CPU Mark Rating
As of 9th of January 2025 - Higher results represent better performance
AMD Phenom II X640 Dual-Core
1,165
AMD A4-3420 APU
1,067
CPU Value (CPU Mark / $Price)
As of 9th of January 2025 - Higher results represent better value
AMD Phenom II X640 Dual-Core
NA
AMD A4-3420 APU
7.8
CPU Single Thread Rating
As of 9th of January 2025 - Higher results represent better performance
AMD Phenom II X640 Dual-Core
1,142
AMD A4-3420 APU
1,119
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 Phenom II X640 Dual-Core AMD A4-3420 APU
Max TDP45W65W
Power consumption per day (kWh)0.090.13
Running cost per day$0.022$0.033
Power consumption per year (kWh)32.947.5
Running cost per year$8.21$11.86
Shown CPU power usage is based on linear interpolation of Max TDP (i.e. max load). Actual CPU power profile may vary.