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AMD Athlon 64 X2 Dual 5800+ vs Intel Core2 Duo E8400

The AMD Athlon 64 X2 Dual Core 5800+ is newer than Intel Core2 Duo E8400 @ 3.00GHz and is around -46% slower in multi-threaded (CPU Mark) testing. The AMD Athlon 64 X2 Dual Core 5800+ is around -40% slower in single-thread testing. Also, AMD Athlon 64 X2 Dual Core 5800+ uses around 31% more power. All the CPUs in this comparison belong in the Desktop CPU Class. The values below were tabulated from a combined 7429 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 5800+×Intel Core2 Duo E8400 @ 3.00GHz+ ADD
Price Search Online $23.03 - BUY
Socket TypeNA2LGA775
CPU ClassDesktopDesktop
Clockspeed3.0 GHz3.0 GHz
Turbo SpeedNot SupportedNot Supported
# of Physical Cores2 (Threads: 2)2 (Threads: 2)
CacheL1: 256KB, L2: 1.0MB, L1: 128KB, L2: 6.0MB, L3: 0MB
TDP89W65W
Yearly Running Cost$16.24$11.86
Other
First Seen on ChartQ1 2009Q4 2008
# of Samples267403
CPU Rank48134158
CPU Value21.853.0
Single Thread Rating(% diff. to max in group)7463(-39.6%)12343(0.0%)
CPU Mark(% diff. to max in group)653(-46.5%)1220(0.0%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.
2 - Information not available. Do you know? Notify Us.
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 23rd of January 2026 - Higher results represent better performance
AMD Athlon 64 X2 Dual Core 5800+
653
Intel Core2 Duo E8400 @ 3.00GHz
1,220
PassMark Software © 2008-2026
CPU Value (CPU Mark / $Price)
As of 23rd of January 2026 - Higher results represent better value
AMD Athlon 64 X2 Dual Core 5800+
21.8
Intel Core2 Duo E8400 @ 3.00GHz
53.0
PassMark Software © 2008-2026
CPU Single Thread Rating
As of 23rd of January 2026 - Higher results represent better performance
AMD Athlon 64 X2 Dual Core 5800+
746
Intel Core2 Duo E8400 @ 3.00GHz
1,234
PassMark Software © 2008-2026
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 5800+ Intel Core2 Duo E8400 @ 3.00GHz
Max TDP89W65W
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.