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Intel i5-6400T vs i5-2500K

The Intel Core i5-6400T @ 2.20GHz is newer than Intel Core i5-2500K @ 3.30GHz however both CPUs have comparable multi-threaded (CPU Mark) and single-thread rating. Also, Intel Core i5-6400T @ 2.20GHz uses substantially less power. All the CPUs in this comparison belong in the Desktop CPU Class. The values below were tabulated from a combined 8669 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 i5-6400T @ 2.20GHz×Intel Core i5-2500K @ 3.30GHz+ ADD
Price Search Online $134.71 - BUY
Socket TypeLGA 1151LGA1155
CPU ClassDesktopDesktop
Clockspeed2.2 GHz3.3 GHz
Turbo SpeedUp to 2.8 GHzUp to 3.7 GHz
# of Physical Cores4 (Threads: 4)4 (Threads: 4)
CacheL1: 256KB, L2: 1.0MB, L3: 6MBL1: 256KB, L2: 1.0MB, L3: 6MB
TDP35W95W
Yearly Running Cost$6.39$17.34
Other
First Seen on ChartQ4 2015Q4 2010
# of Samples5978072
CPU Value26.630.7
Single Thread Rating(% diff. to max in group)1608(-5.3%)1699(0.0%)
CPU Mark(% diff. to max in group)4251(0.0%)4139(-2.6%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 8th of November 2025 - Higher results represent better performance
Intel Core i5-6400T @ 2.20GHz
4,251
Intel Core i5-2500K @ 3.30GHz
4,139
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 8th of November 2025 - Higher results represent better value
Intel Core i5-6400T @ 2.20GHz
26.6
Intel Core i5-2500K @ 3.30GHz
30.7
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 8th of November 2025 - Higher results represent better performance
Intel Core i5-6400T @ 2.20GHz
1,608
Intel Core i5-2500K @ 3.30GHz
1,699
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 i5-6400T @ 2.20GHz Intel Core i5-2500K @ 3.30GHz
Max TDP35W95W
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.