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CPU Benchmarks

Over 1,000,000 CPUs benchmarked

Intel Xeon E5-2665 vs Xeon E5-2643

The Intel Xeon E5-2665 @ 2.40GHz is newer than Intel Xeon E5-2643 @ 3.30GHz and is significantly faster in multi-threaded (CPU Mark) testing. The Intel Xeon E5-2665 @ 2.40GHz is around -10% slower in single-thread testing. Also, Intel Xeon E5-2643 @ 3.30GHz uses around 12% more power. All the CPUs in this comparison belong in the Server CPU Class. The values below were tabulated from a combined 319 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 E5-2643 @ 3.30GHz+ ADD
Price $149.95 - BUY $1837 - BUY
Socket TypeLGA2011LGA2011
CPU ClassServerServer
Clockspeed2.4 GHz3.3 GHz
Turbo SpeedUp to 3.1 GHzUp to 3.5 GHz
# of Physical Cores8 (Threads: 16)4 (Threads: 8)
CacheL1: 512KB, L2: 2.0MB, L3: 20MBL1: 256KB, L2: 1.0MB, L3: 10MB
TDP115W130W
Yearly Running Cost$20.99$23.73
Other
First Seen on ChartQ2 2012Q2 2012
# of Samples181138
CPU Rank17182308
CPU Value55.32.8
Single Thread Rating(% diff. to max in group)1385(-9.9%)1537(0.0%)
CPU Mark(% diff. to max in group)8293(0.0%)5228(-37.0%)

CPU Mark Rating
As of 25th of January 2026 - Higher results represent better performance
Intel Xeon E5-2665 @ 2.40GHz
8,293
Intel Xeon E5-2643 @ 3.30GHz
5,228
PassMark Software © 2008-2026
CPU Value (CPU Mark / $Price)
As of 25th of January 2026 - Higher results represent better value
Intel Xeon E5-2665 @ 2.40GHz
55.3
Intel Xeon E5-2643 @ 3.30GHz
2.8
PassMark Software © 2008-2026
CPU Single Thread Rating
As of 25th of January 2026 - Higher results represent better performance
Intel Xeon E5-2665 @ 2.40GHz
1,385
Intel Xeon E5-2643 @ 3.30GHz
1,537
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 E5-2665 @ 2.40GHz Intel Xeon E5-2643 @ 3.30GHz
Max TDP115W130W
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.