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Intel Atom Z3745 vs Celeron B815

The Intel Atom Z3745 @ 1.33GHz is newer than Intel Celeron B815 @ 1.60GHz, while Intel Celeron B815 @ 1.60GHz is around 14% faster in multi-threaded (CPU Mark) testing, it is around 37% faster in single-thread testing. However, Intel Atom Z3745 @ 1.33GHz uses substantially less power. All the CPUs in this comparison belong in the Laptop CPU Class.The values below were tabulated from a combined 387 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 Atom Z3745 @ 1.33GHz×Intel Celeron B815 @ 1.60GHz+ ADD
Price Search Online Search Online
Socket TypeUTFCBGA1380PGA988B
CPU ClassLaptopLaptop
Clockspeed1.3 GHz1.6 GHz
Turbo SpeedUp to 1.9 GHzNot Supported
# of Physical Cores4 (Threads: 4)2 (Threads: 2)
CacheL1: 448KB, L2: 2.0MB, L3: 0MBL1: 256KB, L2: 1.0MB, L3: 2MB
TDP4W35W
Yearly Running Cost$0.73$6.39
OtherIntel HD Graphics for Intel Atom Processor Z3700 Series
First Seen on ChartQ1 2014Q1 2012
# of Samples98289
CPU Value20.726.9
Single Thread Rating(% diff. to max in group)435(-37.4%)695(0.0%)
CPU Mark(% diff. to max in group)621(-14.4%)726(0.0%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 2nd of April 2025 - Higher results represent better performance
Intel Atom Z3745 @ 1.33GHz
621
Intel Celeron B815 @ 1.60GHz
726
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 2nd of April 2025 - Higher results represent better value
Intel Atom Z3745 @ 1.33GHz
20.7
Intel Celeron B815 @ 1.60GHz
26.9
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 2nd of April 2025 - Higher results represent better performance
Intel Atom Z3745 @ 1.33GHz
435
Intel Celeron B815 @ 1.60GHz
695
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 Atom Z3745 @ 1.33GHz Intel Celeron B815 @ 1.60GHz
Max TDP4W35W
Power consumption per day (kWh)NA0.07
Running cost per dayNA$0.018
Power consumption per year (kWh)NA25.6
Running cost per yearNA$6.39
Shown CPU power usage is based on linear interpolation of Max TDP (i.e. max load). Actual CPU power profile may vary.