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Over 1,000,000 CPUs benchmarked

Intel i3-8109U vs i7-6660U

The Intel Core i3-8109U @ 3.00GHz is newer than Intel Core i7-6660U @ 2.40GHz and is around 15% faster in multi-threaded (CPU Mark) testing. The Intel Core i3-8109U @ 3.00GHz is around 6% faster in single-thread testing. Also, Intel Core i7-6660U @ 2.40GHz uses substantially less power. All the CPUs in this comparison belong in the Laptop CPU Class. The values below were tabulated from a combined 405 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 i3-8109U @ 3.00GHz×Intel Core i7-6660U @ 2.40GHz+ ADD
Price Search Online Search Online
Socket TypeFCBGA1528FCBGA1356
CPU ClassLaptopLaptop
Clockspeed3.0 GHz2.4 GHz
Turbo SpeedUp to 3.6 GHzUp to 3.4 GHz
# of Physical Cores2 (Threads: 4)2 (Threads: 4)
CacheL1: 128KB, L2: 0.5MB, L3: 4MBL1: 64KB, L2: 0.3MB, L3: 4MB
TDP28W15W
Yearly Running Cost$5.11$2.74
OtherIntel Iris Plus Graphics 655Intel Iris Graphics 540
First Seen on ChartQ4 2018Q3 2018
# of Samples37431
CPU Rank25582741
CPU Value8.48.8
Single Thread Rating(% diff. to max in group)2070(0.0%)1947(-5.9%)
CPU Mark(% diff. to max in group)4181(0.0%)3636(-13.0%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 14th of February 2026 - Higher results represent better performance
Intel Core i3-8109U @ 3.00GHz
4,181
Intel Core i7-6660U @ 2.40GHz
3,636
PassMark Software © 2008-2026
CPU Value (CPU Mark / $Price)
As of 14th of February 2026 - Higher results represent better value
Intel Core i3-8109U @ 3.00GHz
8.4
Intel Core i7-6660U @ 2.40GHz
8.8
PassMark Software © 2008-2026
CPU Single Thread Rating
As of 14th of February 2026 - Higher results represent better performance
Intel Core i3-8109U @ 3.00GHz
2,070
Intel Core i7-6660U @ 2.40GHz
1,947
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.
Intel Core i3-8109U @ 3.00GHz Intel Core i7-6660U @ 2.40GHz
Max TDP28W15W
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.