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CPU Benchmarks

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Intel i3-8350K vs i5-8400T

The Intel Core i5-8400T @ 1.70GHz is newer than Intel Core i3-8350K @ 4.00GHz also around 8% faster in multi-threaded (CPU Mark) testing, but Intel Core i3-8350K @ 4.00GHz is around 22% faster in single-thread testing. However, Intel Core i5-8400T @ 1.70GHz uses substantially less power. All the CPUs in this comparison belong in the Desktop CPU Class.The values below were tabulated from a combined 720 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 Core i3-8350K @ 4.00GHz×Intel Core i5-8400T @ 1.70GHz+ ADD
Price $147.66 - BUY Search Online
Socket TypeFCLGA1151-2FCLGA1151-2
CPU ClassDesktopDesktop
Clockspeed4.0 GHz1.7 GHz
Turbo SpeedNot SupportedUp to 3.3 GHz
# of Physical Cores4 (Threads: 4)6 (Threads: 6)
CacheL1: 256KB, L2: 1.0MB, L3: 8MBL1: 384KB, L2: 1.5MB, L3: 9MB
TDP91W35W
Yearly Running Cost$16.61$6.39
OtherIntel UHD Graphics 630Intel UHD Graphics 630
First Seen on ChartQ4 2017Q2 2018
# of Samples371349
CPU Value46.665.8
Single Thread Rating(% diff. to max in group)2472(0.0%)1922(-22.2%)
CPU Mark(% diff. to max in group)6880(-7.8%)7463(0.0%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 15th of January 2025 - Higher results represent better performance
Intel Core i3-8350K @ 4.00GHz
6,880
Intel Core i5-8400T @ 1.70GHz
7,463
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 15th of January 2025 - Higher results represent better value
Intel Core i3-8350K @ 4.00GHz
46.6
Intel Core i5-8400T @ 1.70GHz
65.8
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 15th of January 2025 - Higher results represent better performance
Intel Core i3-8350K @ 4.00GHz
2,472
Intel Core i5-8400T @ 1.70GHz
1,922
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 Core i3-8350K @ 4.00GHz Intel Core i5-8400T @ 1.70GHz
Max TDP91W35W
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.