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Intel Xeon X5677 vs Xeon E5645

The Intel Xeon E5645 @ 2.40GHz is newer than Intel Xeon X5677 @ 3.47GHz, while the multi-threaded (CPU Mark) is simliar, Intel Xeon X5677 @ 3.47GHz is around 30% faster in single-thread testing. However, Intel Xeon X5677 @ 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 185 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 X5677 @ 3.47GHz×Intel Xeon E5645 @ 2.40GHz+ ADD
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Socket TypeLGA1366LGA1366
CPU ClassServerServer
Clockspeed3.5 GHz2.4 GHz
Turbo SpeedUp to 3.7 GHzUp to 2.7 GHz
# of Physical Cores4 (Threads: 8)6 (Threads: 12)
CacheL1: 256KB, L2: 1.0MB, L3: 12MBL1: 384KB, L2: 1.5MB, L3: 12MB
TDP130W80W
Yearly Running Cost$23.73$14.60
Other
First Seen on ChartQ1 2010Q2 2011
# of Samples84101
CPU Value45.936.6
Single Thread Rating(% diff. to max in group)1617(0.0%)1134(-29.9%)
CPU Mark(% diff. to max in group)5053(0.0%)5011(-0.8%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 12th of March 2025 - Higher results represent better performance
Intel Xeon X5677 @ 3.47GHz
5,053
Intel Xeon E5645 @ 2.40GHz
5,011
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 12th of March 2025 - Higher results represent better value
Intel Xeon X5677 @ 3.47GHz
45.9
Intel Xeon E5645 @ 2.40GHz
36.6
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 12th of March 2025 - Higher results represent better performance
Intel Xeon X5677 @ 3.47GHz
1,617
Intel Xeon E5645 @ 2.40GHz
1,134
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 X5677 @ 3.47GHz Intel Xeon E5645 @ 2.40GHz
Max TDP130W80W
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.