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Intel Core2 Extreme Q9300 vs Core2 Quad Q8400

The Intel Core2 Quad Q8400 @ 2.66GHz is newer than Intel Core2 Extreme Q9300 @ 2.53GHz and has comparable multi-threaded (CPU Mark) and single-thread rating. However, Intel Core2 Extreme Q9300 @ 2.53GHz uses substantially less power. All the CPUs in this comparison belong in the Desktop CPU Class.The values below were tabulated from a combined 1862 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 Extreme Q9300 @ 2.53GHz×Intel Core2 Quad Q8400 @ 2.66GHz+ ADD
Price Search Online Search Online
Socket TypePGA478LGA775
CPU ClassDesktopDesktop
Clockspeed2.5 GHz2.7 GHz
Turbo SpeedNot SupportedNot Supported
# of Physical Cores4 (Threads: 4)4 (Threads: 4)
CacheL1: 256KB, L2: 12.0MB, L3: 0MBL1: 256KB, L2: 4.0MB, L3: 0MB
TDP45W95W
Yearly Running Cost$8.21$17.34
Other
First Seen on ChartQ4 2008Q2 2009
# of Samples2101652
CPU Value0.016.0
Single Thread Rating(% diff. to max in group)1085(-4.9%)1141(0.0%)
CPU Mark(% diff. to max in group)1993(-3.7%)2068(0.0%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 1st of April 2025 - Higher results represent better performance
Intel Core2 Extreme Q9300 @ 2.53GHz
1,993
Intel Core2 Quad Q8400 @ 2.66GHz
2,068
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 1st of April 2025 - Higher results represent better value
Intel Core2 Extreme Q9300 @ 2.53GHz
NA
Intel Core2 Quad Q8400 @ 2.66GHz
16.0
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 1st of April 2025 - Higher results represent better performance
Intel Core2 Extreme Q9300 @ 2.53GHz
1,085
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 Extreme Q9300 @ 2.53GHz Intel Core2 Quad Q8400 @ 2.66GHz
Max TDP45W95W
Power consumption per day (kWh)0.090.19
Running cost per day$0.022$0.048
Power consumption per year (kWh)32.969.3
Running cost per year$8.21$17.34
Shown CPU power usage is based on linear interpolation of Max TDP (i.e. max load). Actual CPU power profile may vary.