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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

Intel Core2 Duo E8600 vs Core2 Quad Q8400

The Intel Core2 Quad Q8400 @ 2.66GHz is newer than Intel Core2 Duo E8600 @ 3.33GHz also around 34% faster in multi-threaded (CPU Mark) testing, but Intel Core2 Duo E8600 @ 3.33GHz is around 17% faster in single-thread testing. However, Intel Core2 Quad Q8400 @ 2.66GHz uses around 38% more power. All the CPUs in this comparison belong in the Desktop CPU Class.The values below were tabulated from a combined 2411 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.

×Intel Core2 Duo E8600 @ 3.33GHz×Intel Core2 Quad Q8400 @ 2.66GHz+ ADD
Price Search Online Search Online
Socket TypeLGA775LGA775
CPU ClassDesktopDesktop
Clockspeed3.3 GHz2.7 GHz
Turbo SpeedNot SupportedNot Supported
# of Physical Cores2 (Threads: 2)4 (Threads: 4)
CacheL1: 128KB, L2: 6.0MB, L3: 0MBL1: 256KB, L2: 4.0MB, L3: 0MB
TDP65W95W
Yearly Running Cost$11.86$17.34
Other
First Seen on ChartQ4 2008Q2 2009
# of Samples7631648
CPU Value13.716.1
Single Thread Rating(% diff. to max in group)13833(0.0%)1141(-17.5%)
CPU Mark(% diff. to max in group)1360(-34.3%)2069(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 10th of March 2025 - Higher results represent better performance
Intel Core2 Duo E8600 @ 3.33GHz
1,360
Intel Core2 Quad Q8400 @ 2.66GHz
2,069
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 10th of March 2025 - Higher results represent better value
Intel Core2 Duo E8600 @ 3.33GHz
13.7
Intel Core2 Quad Q8400 @ 2.66GHz
16.1
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 10th of March 2025 - Higher results represent better performance
Intel Core2 Duo E8600 @ 3.33GHz
1,383
Intel Core2 Quad Q8400 @ 2.66GHz
1,141
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.
Intel Core2 Duo E8600 @ 3.33GHz Intel Core2 Quad Q8400 @ 2.66GHz
Max TDP65W95W
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.