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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

Intel Core2 Duo E8400 vs Core2 Quad Q8300

The Intel Core2 Quad Q8300 @ 2.50GHz is newer than Intel Core2 Duo E8400 @ 3.00GHz also around 36% faster in multi-threaded (CPU Mark) testing, but Intel Core2 Duo E8400 @ 3.00GHz is around 14% faster in single-thread testing. However, Intel Core2 Quad Q8300 @ 2.50GHz 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 9399 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 E8400 @ 3.00GHz×Intel Core2 Quad Q8300 @ 2.50GHz+ ADD
Price $23.03 - BUY $79.1 - BUY
Socket TypeLGA775LGA775
CPU ClassDesktopDesktop
Clockspeed3.0 GHz2.5 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 2008Q1 2009
# of Samples72922107
CPU Value52.624.1
Single Thread Rating(% diff. to max in group)12333(0.0%)1061(-14.0%)
CPU Mark(% diff. to max in group)1211(-36.4%)1903(0.0%)
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 17th of March 2025 - Higher results represent better performance
Intel Core2 Duo E8400 @ 3.00GHz
1,211
Intel Core2 Quad Q8300 @ 2.50GHz
1,903
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 17th of March 2025 - Higher results represent better value
Intel Core2 Duo E8400 @ 3.00GHz
52.6
Intel Core2 Quad Q8300 @ 2.50GHz
24.1
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 17th of March 2025 - Higher results represent better performance
Intel Core2 Duo E8400 @ 3.00GHz
1,233
Intel Core2 Quad Q8300 @ 2.50GHz
1,061
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 E8400 @ 3.00GHz Intel Core2 Quad Q8300 @ 2.50GHz
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.