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AMD Athlon 64 X2 Dual 6400+ vs Intel Core2 Duo E8400

The Intel Core2 Duo E8400 @ 3.00GHz is newer than AMD Athlon 64 X2 Dual Core 6400+ also around 19% faster in multi-threaded (CPU Mark) testing, it is around 8% faster in single-thread testing. However, Intel Core2 Duo E8400 @ 3.00GHz uses substantially less power. All the CPUs in this comparison belong in the Desktop CPU Class.The values below were tabulated from a combined 7512 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 64 X2 Dual Core 6400+×Intel Core2 Duo E8400 @ 3.00GHz+ ADD
Price Search Online Search Online
Socket TypeAM2LGA775
CPU ClassDesktopDesktop
Clockspeed3.2 GHz3.0 GHz
Turbo SpeedNot SupportedNot Supported
# of Physical Cores2 (Threads: 2)2 (Threads: 2)
CacheL1: 256KB, L2: 2.0MB, L1: 128KB, L2: 6.0MB, L3: 0MB
TDP125W65W
Yearly Running Cost$22.81$11.86
Other
First Seen on ChartQ4 2008Q4 2008
# of Samples2397273
CPU Value3.952.5
Single Thread Rating(% diff. to max in group)11313(-8.4%)12343(0.0%)
CPU Mark(% diff. to max in group)982(-18.7%)1208(0.0%)
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 February 2025 - Higher results represent better performance
AMD Athlon 64 X2 Dual Core 6400+
982
Intel Core2 Duo E8400 @ 3.00GHz
1,208
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 9th of February 2025 - Higher results represent better value
AMD Athlon 64 X2 Dual Core 6400+
3.9
Intel Core2 Duo E8400 @ 3.00GHz
52.5
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 9th of February 2025 - Higher results represent better performance
AMD Athlon 64 X2 Dual Core 6400+
1,131
Intel Core2 Duo E8400 @ 3.00GHz
1,234
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 64 X2 Dual Core 6400+ Intel Core2 Duo E8400 @ 3.00GHz
Max TDP125W65W
Power consumption per day (kWh)NANA
Running cost per dayNANA
Power consumption per year (kWh)NANA
Running cost per yearNANA
Shown CPU power usage is based on linear interpolation of Max TDP (i.e. max load). Actual CPU power profile may vary.