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Intel Xeon E5645 vs Xeon W3690

The Intel Xeon E5645 @ 2.40GHz is newer than Intel Xeon W3690 @ 3.47GHz and is around -33% slower in multi-threaded (CPU Mark) testing. The Intel Xeon E5645 @ 2.40GHz is around -31% slower in single-thread testing. Also, Intel Xeon W3690 @ 3.47GHz uses around 48% more power. All the CPUs in this comparison belong in the Server CPU Class. The values below were tabulated from a combined 605 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 E5645 @ 2.40GHz×Intel Xeon W3690 @ 3.47GHz+ ADD
Price Search Online Search Online
Socket TypeLGA1366LGA1366
CPU ClassServerServer
Clockspeed2.4 GHz3.5 GHz
Turbo SpeedUp to 2.7 GHzUp to 3.7 GHz
# of Physical Cores6 (Threads: 12)6 (Threads: 12)
CacheL1: 384KB, L2: 1.5MB, L3: 12MBL1: 384KB, L2: 1.5MB, L3: 12MB
TDP80W130W
Yearly Running Cost$14.60$23.73
Other
First Seen on ChartQ2 2011Q1 2011
# of Samples112493
CPU Rank23941879
CPU Value35.947.6
Single Thread Rating(% diff. to max in group)1131(-30.5%)1628(0.0%)
CPU Mark(% diff. to max in group)4921(-32.8%)7325(0.0%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 15th of February 2026 - Higher results represent better performance
Intel Xeon E5645 @ 2.40GHz
4,921
Intel Xeon W3690 @ 3.47GHz
7,325
PassMark Software © 2008-2026
CPU Value (CPU Mark / $Price)
As of 15th of February 2026 - Higher results represent better value
Intel Xeon E5645 @ 2.40GHz
35.9
Intel Xeon W3690 @ 3.47GHz
47.6
PassMark Software © 2008-2026
CPU Single Thread Rating
As of 15th of February 2026 - Higher results represent better performance
Intel Xeon E5645 @ 2.40GHz
1,131
Intel Xeon W3690 @ 3.47GHz
1,628
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 E5645 @ 2.40GHz Intel Xeon W3690 @ 3.47GHz
Max TDP80W130W
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.