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Intel Xeon E5-2665 vs Xeon E5-2640

The Intel Xeon E5-2665 @ 2.40GHz is newer than Intel Xeon E5-2640 @ 2.50GHz and is around 31% faster in multi-threaded (CPU Mark) testing. However the CPUs have comparable single-thread rating. Also, Intel Xeon E5-2665 @ 2.40GHz uses around 19% more power. All the CPUs in this comparison belong in the Server CPU Class. The values below were tabulated from a combined 430 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 E5-2665 @ 2.40GHz×Intel Xeon E5-2640 @ 2.50GHz+ ADD
Price $149.95 - BUY Search Online
Socket TypeLGA2011LGA2011
CPU ClassServerServer
Clockspeed2.4 GHz2.5 GHz
Turbo SpeedUp to 3.1 GHzUp to 3.0 GHz
# of Physical Cores8 (Threads: 16)6 (Threads: 12)
CacheL1: 512KB, L2: 2.0MB, L3: 20MBL1: 384KB, L2: 1.5MB, L3: 15MB
TDP115W95W
Yearly Running Cost$20.99$17.34
Other
First Seen on ChartQ2 2012Q2 2012
# of Samples176254
CPU Value55.148.4
Single Thread Rating(% diff. to max in group)1379(0.0%)1344(-2.6%)
CPU Mark(% diff. to max in group)8264(0.0%)6286(-23.9%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 14th of June 2025 - Higher results represent better performance
Intel Xeon E5-2665 @ 2.40GHz
8,264
Intel Xeon E5-2640 @ 2.50GHz
6,286
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 14th of June 2025 - Higher results represent better value
Intel Xeon E5-2665 @ 2.40GHz
55.1
Intel Xeon E5-2640 @ 2.50GHz
48.4
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 14th of June 2025 - Higher results represent better performance
Intel Xeon E5-2665 @ 2.40GHz
1,379
Intel Xeon E5-2640 @ 2.50GHz
1,344
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 Xeon E5-2665 @ 2.40GHz Intel Xeon E5-2640 @ 2.50GHz
Max TDP115W95W
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.