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Intel i3-2125 vs Core2 Quad Q8400

The Intel Core i3-2125 @ 3.30GHz is newer than Intel Core2 Quad Q8400 @ 2.66GHz, while the multi-threaded (CPU Mark) is simliar, Intel Core i3-2125 @ 3.30GHz is around 27% 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 1754 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 Core i3-2125 @ 3.30GHz×Intel Core2 Quad Q8400 @ 2.66GHz+ ADD
Price Search Online Search Online
Socket TypeLGA1155LGA775
CPU ClassDesktopDesktop
Clockspeed3.3 GHz2.7 GHz
Turbo SpeedNot SupportedNot Supported
# of Physical Cores2 (Threads: 4)4 (Threads: 4)
CacheL1: 128KB, L2: 0.5MB, L3: 3MBL1: 256KB, L2: 4.0MB, L3: 0MB
TDP65W95W
Yearly Running Cost$11.86$17.34
Other
First Seen on ChartQ3 2011Q2 2009
# of Samples1061648
CPU Value13.516.1
Single Thread Rating(% diff. to max in group)1573(0.0%)1141(-27.4%)
CPU Mark(% diff. to max in group)2090(0.0%)2069(-1.0%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 26th of February 2025 - Higher results represent better performance
Intel Core i3-2125 @ 3.30GHz
2,090
Intel Core2 Quad Q8400 @ 2.66GHz
2,069
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 26th of February 2025 - Higher results represent better value
Intel Core i3-2125 @ 3.30GHz
13.5
Intel Core2 Quad Q8400 @ 2.66GHz
16.1
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 26th of February 2025 - Higher results represent better performance
Intel Core i3-2125 @ 3.30GHz
1,573
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 Core i3-2125 @ 3.30GHz 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.