iconcharts
0

CPU Benchmarks

Over 1,000,000 CPUs benchmarked

Intel Core2 Quad Q9400 vs AMD A8-3820 APU

The AMD A8-3820 APU is newer than Intel Core2 Quad Q9400 @ 2.66GHz however both CPUs have comparable multi-threaded (CPU Mark) and single-thread rating. Also, Intel Core2 Quad Q9400 @ 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 2671 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 Quad Q9400 @ 2.66GHz×AMD A8-3820 APU+ ADD
Price Search Online Search Online
Socket TypeLGA775FM1
CPU ClassDesktopDesktop
Clockspeed2.7 GHz2.5 GHz
Turbo SpeedNot SupportedUp to 2.8 GHz
# of Physical Cores4 (Threads: 4)4 (Threads: 4)
CacheL1: 256KB, L2: 6.0MB, L3: 0MBL1: 512KB, L2: 4.0MB,
TDP95W65W
Yearly Running Cost$17.34$11.86
Other
First Seen on ChartQ4 2008Q1 2012
# of Samples2531140
CPU Value86.048.7
Single Thread Rating(% diff. to max in group)1139(0.0%)1128(-1.0%)
CPU Mark(% diff. to max in group)2154(-1.6%)2189(0.0%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 14th of July 2025 - Higher results represent better performance
Intel Core2 Quad Q9400 @ 2.66GHz
2,154
AMD A8-3820 APU
2,189
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 14th of July 2025 - Higher results represent better value
Intel Core2 Quad Q9400 @ 2.66GHz
86.0
AMD A8-3820 APU
48.7
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 14th of July 2025 - Higher results represent better performance
Intel Core2 Quad Q9400 @ 2.66GHz
1,139
AMD A8-3820 APU
1,128
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 Quad Q9400 @ 2.66GHz AMD A8-3820 APU
Max TDP95W65W
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.