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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

Intel Core2 Quad Q8400 vs AMD Ryzen 5 3400G vs i9-9900K

All the CPUs in this comparison belong in the Desktop CPU Class.The values below were tabulated from a combined 19688 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 Q8400 @ 2.66GHz×AMD Ryzen 5 3400G×Intel Core i9-9900K @ 3.60GHz+ ADD
Price Search Online $113.93 - BUY Search Online
Socket TypeLGA775AM4FCLGA1151-2
CPU ClassDesktopDesktopDesktop
Clockspeed2.7 GHz3.7 GHz3.6 GHz
Turbo SpeedNot SupportedUp to 4.2 GHzUp to 5.0 GHz
# of Physical Cores4 (Threads: 4)4 (Threads: 8)8 (Threads: 16)
CacheL1: 256KB, L2: 4.0MB, L3: 0MBL1: 384KB, L2: 2.0MB, L3: 4MBL1: 512KB, L2: 2.0MB, L3: 16MB
TDP95W65W95W
Yearly Running Cost$17.34$11.86$17.34
Otherwith Radeon Vega GraphicsIntel UHD Graphics 630
First Seen on ChartQ2 2009Q3 2019Q4 2018
# of Samples1652336314673
CPU Value16.081.00.0
Single Thread Rating(% diff. to max in group)1141(-61.0%)2323(-20.5%)2922(0.0%)
CPU Mark(% diff. to max in group)2068(-88.6%)9230(-49.3%)18190(0.0%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 11th of April 2025 - Higher results represent better performance
Intel Core2 Quad Q8400 @ 2.66GHz
2,068
AMD Ryzen 5 3400G
9,230
Intel Core i9-9900K @ 3.60GHz
18,190
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 11th of April 2025 - Higher results represent better value
Intel Core2 Quad Q8400 @ 2.66GHz
16.0
AMD Ryzen 5 3400G
81.0
Intel Core i9-9900K @ 3.60GHz
NA
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 11th of April 2025 - Higher results represent better performance
Intel Core2 Quad Q8400 @ 2.66GHz
1,141
AMD Ryzen 5 3400G
2,323
Intel Core i9-9900K @ 3.60GHz
2,922
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 Q8400 @ 2.66GHz AMD Ryzen 5 3400G Intel Core i9-9900K @ 3.60GHz
Max TDP95W65W95W
Power consumption per day (kWh)NANANA
Running cost per dayNANANA
Power consumption per year (kWh)NANANA
Running cost per yearNANANA
Shown CPU power usage is based on linear interpolation of Max TDP (i.e. max load). Actual CPU power profile may vary.