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Intel Atom C3858 vs Xeon E3-1280

The Intel Atom C3858 @ 2.00GHz is newer than Intel Xeon E3-1280 @ 3.50GHz and is around -11% slower in multi-threaded (CPU Mark) testing. However, it is significantly slower in single-thread testing. Also, Intel Atom C3858 @ 2.00GHz uses substantially less power. All the CPUs in this comparison belong in the Server CPU Class. The values below were tabulated from a combined 93 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 C3858 @ 2.00GHz×Intel Xeon E3-1280 @ 3.50GHz+ ADD
Price Search Online Search Online
Socket TypeFCBGA1310LGA1155
CPU ClassServerServer
Clockspeed2.0 GHz3.5 GHz
Turbo SpeedNot SupportedUp to 3.9 GHz
# of Physical Cores12 (Threads: 12)4 (Threads: 8)
CacheL1: 896KB, L2: 8.0MB, L3: 0MBL1: 256KB, L2: 1.0MB,
TDP25W95W
Yearly Running Cost$4.56$17.34
Other
First Seen on ChartQ3 2018Q2 2011
# of Samples390
CPU Value15.211.4
Single Thread Rating(% diff. to max in group)702(-61.1%)1802(0.0%)
CPU Mark(% diff. to max in group)5040(-10.8%)5650(0.0%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 19th of July 2025 - Higher results represent better performance
Intel Atom C3858 @ 2.00GHz
5,040
Intel Xeon E3-1280 @ 3.50GHz
5,650
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 19th of July 2025 - Higher results represent better value
Intel Atom C3858 @ 2.00GHz
15.2
Intel Xeon E3-1280 @ 3.50GHz
11.4
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 19th of July 2025 - Higher results represent better performance
Intel Atom C3858 @ 2.00GHz
702
Intel Xeon E3-1280 @ 3.50GHz
1,802
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 C3858 @ 2.00GHz Intel Xeon E3-1280 @ 3.50GHz
Max TDP25W95W
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.