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Intel i3-8121U vs i5-6287U

The Intel Core i3-8121U @ 2.20GHz is newer than Intel Core i5-6287U @ 3.10GHz and is around 12% faster in multi-threaded (CPU Mark) testing. However the CPUs have comparable single-thread rating. Also, Intel Core i3-8121U @ 2.20GHz uses substantially less power. All the CPUs in this comparison belong in the Laptop CPU Class. The values below were tabulated from a combined 78 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 i3-8121U @ 2.20GHz×Intel Core i5-6287U @ 3.10GHz+ ADD
Price Search Online Search Online
Socket TypeNA2FCBGA1356
CPU ClassLaptopLaptop
Clockspeed2.2 GHz3.1 GHz
Turbo SpeedUp to 3.2 GHzUp to 3.5 GHz
# of Physical Cores2 (Threads: 4)2 (Threads: 4)
CacheL1: 128KB, L2: 0.5MB, L3: 4MBL1: 128KB, L2: 0.5MB, L3: 4MB
TDP15W28W
Yearly Running Cost$2.74$5.11
OtherIntel Iris Graphics 550
First Seen on ChartQ4 2018Q4 2017
# of Samples3642
CPU Value14.712.5
Single Thread Rating(% diff. to max in group)1896(-4.0%)1974(0.0%)
CPU Mark(% diff. to max in group)4271(0.0%)3801(-11.0%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.
2 - Information not available. Do you know? Notify Us.

CPU Mark Rating
As of 18th of November 2025 - Higher results represent better performance
Intel Core i3-8121U @ 2.20GHz
4,271
Intel Core i5-6287U @ 3.10GHz
3,801
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 18th of November 2025 - Higher results represent better value
Intel Core i3-8121U @ 2.20GHz
14.7
Intel Core i5-6287U @ 3.10GHz
12.5
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 18th of November 2025 - Higher results represent better performance
Intel Core i3-8121U @ 2.20GHz
1,896
Intel Core i5-6287U @ 3.10GHz
1,974
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 i3-8121U @ 2.20GHz Intel Core i5-6287U @ 3.10GHz
Max TDP15W28W
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.