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Intel Xeon L5638 vs Xeon E5645

The Intel Xeon L5638 @ 2.00GHz is newer than Intel Xeon E5645 @ 2.40GHz, while Intel Xeon E5645 @ 2.40GHz is around 27% faster in multi-threaded (CPU Mark) testing, it is around 25% faster in single-thread testing. However, Intel Xeon E5645 @ 2.40GHz uses around 29% more power. All the CPUs in this comparison belong in the Server CPU Class.The values below were tabulated from a combined 113 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 L5638 @ 2.00GHz×Intel Xeon E5645 @ 2.40GHz+ ADD
Price Search Online Search Online
Socket TypeLGA1366LGA1366
CPU ClassServerServer
Clockspeed2.0 GHz2.4 GHz
Turbo SpeedUp to 2.4 GHzUp to 2.7 GHz
# of Physical Cores6 (Threads: 12)6 (Threads: 12)
CacheL1: 512KB, L2: 2.0MB, L3: 12MBL1: 384KB, L2: 1.5MB, L3: 12MB
TDP60W80W
Yearly Running Cost$10.95$14.60
Other
First Seen on ChartQ2 2011Q2 2011
# of Samples1499
CPU Value53.036.8
Single Thread Rating(% diff. to max in group)862(-25.4%)1156(0.0%)
CPU Mark(% diff. to max in group)3707(-26.5%)5046(0.0%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 27th of July 2024 - Higher results represent better performance
Intel Xeon L5638 @ 2.00GHz
3,707
Intel Xeon E5645 @ 2.40GHz
5,046
PassMark Software © 2008-2024
CPU Value (CPU Mark / $Price)
As of 27th of July 2024 - Higher results represent better value
Intel Xeon L5638 @ 2.00GHz
53.0
Intel Xeon E5645 @ 2.40GHz
36.8
PassMark Software © 2008-2024
CPU Single Thread Rating
As of 27th of July 2024 - Higher results represent better performance
Intel Xeon L5638 @ 2.00GHz
862
Intel Xeon E5645 @ 2.40GHz
1,156
PassMark Software © 2008-2024

Estimated Energy Usage Cost
Estimated Energy Adjustable Values
Average hours of use per dayAverage CPU Utilization (0-100%)1Power cost, $ per kWh2
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 L5638 @ 2.00GHzIntel Xeon E5645 @ 2.40GHz
Max TDP60W80W
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.