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CPU Benchmarks

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AMD Ryzen 9 5900 vs Ryzen 9 3900XT

The AMD Ryzen 9 5900 is newer than AMD Ryzen 9 3900XT is around 25% faster in single-thread testing. Also, AMD Ryzen 9 3900XT uses around 47% more power. All the CPUs in this comparison belong in the Desktop CPU Class. The values below were tabulated from a combined 1893 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 9 5900×AMD Ryzen 9 3900XT+ ADD
Price Search Online Search Online
Socket TypeAM4AM4
CPU ClassDesktopDesktop
Clockspeed3.0 GHz3.8 GHz
Turbo SpeedUp to 4.7 GHzUp to 4.7 GHz
# of Physical Cores12 (Threads: 24)12 (Threads: 24)
CacheL1: 768KB, L2: 6.0MB, L3: 64MBL1: 768KB, L2: 6.0MB, L3: 64MB
TDP65W105W
Yearly Running Cost$11.86$19.16
Other
First Seen on ChartQ2 2021Q3 2020
# of Samples2971596
CPU Rank429458
CPU Value0.083.3
Single Thread Rating(% diff. to max in group)3434(0.0%)2743(-20.1%)
CPU Mark(% diff. to max in group)33954(0.0%)32500(-4.3%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 17th of March 2026 - Higher results represent better performance
AMD Ryzen 9 5900
33,954
AMD Ryzen 9 3900XT
32,500
PassMark Software © 2008-2026
CPU Value (CPU Mark / $Price)
As of 17th of March 2026 - Higher results represent better value
AMD Ryzen 9 5900
NA
AMD Ryzen 9 3900XT
83.3
PassMark Software © 2008-2026
CPU Single Thread Rating
As of 17th of March 2026 - Higher results represent better performance
AMD Ryzen 9 5900
3,434
AMD Ryzen 9 3900XT
2,743
PassMark Software © 2008-2026
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 9 5900 AMD Ryzen 9 3900XT
Max TDP65W105W
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.