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Mobile AMD Athlon XP-M 2800+ vs Sempron SI-42

The Mobile AMD Athlon XP-M 2800+ is newer than AMD Sempron SI-42 however both CPUs have comparable multi-threaded (CPU Mark) and single-thread rating. All the CPUs in this comparison belong in the Laptop CPU Class. The values below were tabulated from a combined 129 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.

×Mobile AMD Athlon XP-M 2800+×AMD Sempron SI-42+ ADD
Price Search Online Search Online
Socket TypeNA2S1
CPU ClassLaptopLaptop
Clockspeed2.1 GHz2.1 GHz
Turbo SpeedNot SupportedNot Supported
# of Physical Cores1 (Threads: 1)1 (Threads: 1)
CacheL1: 128KB, L2: 0.5MB, L1: 128KB, L2: 0.5MB,
TDPNA225W
Yearly Running CostNA$4.56
Other
First Seen on ChartQ2 2009Q1 2009
# of Samples3126
CPU Value0.08.2
Single Thread Rating(% diff. to max in group)3853(-39.7%)6373(0.0%)
CPU Mark(% diff. to max in group)238(-2.8%)245(0.0%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.
2 - Information not available. Do you know? Notify Us.
3 - Single thread rating may be higher than the overall rating, thread performance is just one component of the CPU Mark.

CPU Mark Rating
As of 15th of November 2025 - Higher results represent better performance
Mobile AMD Athlon XP-M 2800+
238
AMD Sempron SI-42
245
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 15th of November 2025 - Higher results represent better value
Mobile AMD Athlon XP-M 2800+
NA
AMD Sempron SI-42
8.2
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 15th of November 2025 - Higher results represent better performance
Mobile AMD Athlon XP-M 2800+
385
AMD Sempron SI-42
637
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.
Mobile AMD Athlon XP-M 2800+ AMD Sempron SI-42
Max TDPNA25W
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.