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Over 1,000,000 CPUs benchmarked

Intel Xeon X3350 vs Xeon E5440

The Intel Xeon E5440 @ 2.83GHz is newer than Intel Xeon X3350 @ 2.66GHz is around 6% faster in single-thread testing. Also, Intel Xeon X3350 @ 2.66GHz uses around 17% more power. All the CPUs in this comparison belong in the Server CPU Class. The values below were tabulated from a combined 556 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 Xeon X3350 @ 2.66GHz×Intel Xeon E5440 @ 2.83GHz+ ADD
Price Search Online Search Online
Socket TypeLGA775LGA771
CPU ClassServerServer
Clockspeed2.7 GHz2.8 GHz
Turbo SpeedNot SupportedNot Supported
# of Physical Cores4 (Threads: 4)4 (Threads: 4)
CacheL1: 256KB, L2: 12.0MB, L3: 0MBL1: 256KB, L2: 12.0MB, L3: 0MB
TDP95W80W
Yearly Running Cost$17.34$14.60
Other
First Seen on ChartQ4 2008Q1 2009
# of Samples23533
CPU Rank34293384
CPU Value38.262.3
Single Thread Rating(% diff. to max in group)1160(-5.2%)1224(0.0%)
CPU Mark(% diff. to max in group)2291(-3.2%)2367(0.0%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 9th of March 2026 - Higher results represent better performance
Intel Xeon X3350 @ 2.66GHz
2,291
Intel Xeon E5440 @ 2.83GHz
2,367
PassMark Software © 2008-2026
CPU Value (CPU Mark / $Price)
As of 9th of March 2026 - Higher results represent better value
Intel Xeon X3350 @ 2.66GHz
38.2
Intel Xeon E5440 @ 2.83GHz
62.3
PassMark Software © 2008-2026
CPU Single Thread Rating
As of 9th of March 2026 - Higher results represent better performance
Intel Xeon X3350 @ 2.66GHz
1,160
Intel Xeon E5440 @ 2.83GHz
1,224
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 Xeon X3350 @ 2.66GHz Intel Xeon E5440 @ 2.83GHz
Max TDP95W80W
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.