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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

AMD Ryzen 7 4700U vs Ryzen 7 7840U vs Ryzen 7 8840U vs Ryzen 9 7945HX

The CPUs selected in this comparison belong in different CPU Classes: Laptop, Desktop. Consider, selecting CPUs from simliar CPU Class for more apt comparison. The values below were tabulated from a combined 3659 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.

×AMD Ryzen 7 4700U×AMD Ryzen 7 7840U×AMD Ryzen 7 8840U×AMD Ryzen 9 7945HX+ ADD
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Socket TypeFP6NA2FP7 FP7r2 FP8FL1
CPU ClassLaptopLaptopDesktop, LaptopLaptop
Clockspeed2.0 GHz3.3 GHz3.3 GHz2.5 GHz
Turbo SpeedUp to 4.1 GHzUp to 5.1 GHzUp to 5.1 GHzUp to 5.4 GHz
# of Physical Cores8 (Threads: 8)8 (Threads: 16)8 (Threads: 16)16 (Threads: 32)
CacheL1: 512KB, L2: 4.0MB, L3: 8MBL1: 512KB, L2: 8.0MB, L3: 16MBL1: 512KB, L2: 8.0MB, L3: 16MBL1: 1,024KB, L2: 16.0MB, L3: 64MB
TDP15W30W28W55W
Yearly Running Cost$2.74$5.48$5.11$10.04
Otherwith Radeon Graphicsw/ Radeon 780M Graphicsw/ Radeon 780M GraphicsAMD Radeon 610M
First Seen on ChartQ2 2020Q2 2023Q2 2024Q1 2023
# of Samples17343842901251
CPU Value0.00.00.00.0
Single Thread Rating(% diff. to max in group)2509(-38.2%)3588(-11.5%)3551(-12.5%)4057(0.0%)
CPU Mark(% diff. to max in group)13246(-75.8%)24951(-54.5%)23316(-57.5%)54839(0.0%)
2 - Information not available. Do you know? Notify Us.

CPU Mark Rating
As of 24th of April 2025 - Higher results represent better performance
AMD Ryzen 7 4700U
13,246
AMD Ryzen 7 7840U
24,951
AMD Ryzen 7 8840U
23,316
AMD Ryzen 9 7945HX
54,839
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 24th of April 2025 - Higher results represent better performance
AMD Ryzen 7 4700U
2,509
AMD Ryzen 7 7840U
3,588
AMD Ryzen 7 8840U
3,551
AMD Ryzen 9 7945HX
4,057
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.
AMD Ryzen 7 4700U AMD Ryzen 7 7840U AMD Ryzen 7 8840U AMD Ryzen 9 7945HX
Max TDP15W30W28W55W
Power consumption per day (kWh)NANANANA
Running cost per dayNANANANA
Power consumption per year (kWh)NANANANA
Running cost per yearNANANANA
Shown CPU power usage is based on linear interpolation of Max TDP (i.e. max load). Actual CPU power profile may vary.