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Intel Celeron 3965U vs i5-520M

The Intel Celeron 3965U @ 2.20GHz is newer than Intel Core i5-520M @ 2.40GHz is around 22% faster in single-thread testing. Also, Intel Celeron 3965U @ 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 3199 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 Celeron 3965U @ 2.20GHz×Intel Core i5-520M @ 2.40GHz+ ADD
Price Search Online Search Online
Socket TypeFCBGA1356BGA1288
CPU ClassLaptopLaptop
Clockspeed2.2 GHz2.4 GHz
Turbo SpeedNot SupportedUp to 2.9 GHz
# of Physical Cores2 (Threads: 2)2 (Threads: 4)
CacheL1: 128KB, L2: 0.5MB, L3: 2MBL1: 128KB, L2: 0.5MB, L3: 3MB
TDP15W35W
Yearly Running Cost$2.74$6.39
Other Intel HD Graphics 610
First Seen on ChartQ4 2017Q1 2010
# of Samples493150
CPU Rank37383752
CPU Value16.417.3
Single Thread Rating(% diff. to max in group)1338(0.0%)1093(-18.3%)
CPU Mark(% diff. to max in group)1753(0.0%)1730(-1.3%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 17th of January 2026 - Higher results represent better performance
Intel Celeron 3965U @ 2.20GHz
1,753
Intel Core i5-520M @ 2.40GHz
1,730
PassMark Software © 2008-2026
CPU Value (CPU Mark / $Price)
As of 17th of January 2026 - Higher results represent better value
Intel Celeron 3965U @ 2.20GHz
16.4
Intel Core i5-520M @ 2.40GHz
17.3
PassMark Software © 2008-2026
CPU Single Thread Rating
As of 17th of January 2026 - Higher results represent better performance
Intel Celeron 3965U @ 2.20GHz
1,338
Intel Core i5-520M @ 2.40GHz
1,093
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 Celeron 3965U @ 2.20GHz Intel Core i5-520M @ 2.40GHz
Max TDP15W35W
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.