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Intel Xeon E5645 vs Xeon E5-1620 v3

The Intel Xeon E5-1620 v3 @ 3.50GHz is newer than Intel Xeon E5645 @ 2.40GHz also around 28% faster in multi-threaded (CPU Mark) testing, it is around 43% faster in single-thread testing. However, Intel Xeon E5645 @ 2.40GHz uses substantially less power. All the CPUs in this comparison belong in the Server CPU Class.The values below were tabulated from a combined 1251 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 E5-1620 v3 @ 3.50GHz+ ADD
Price Search Online $189.95 - BUY
Socket TypeLGA1366LGA2011-v3
CPU ClassServerServer
Clockspeed2.4 GHz3.5 GHz
Turbo SpeedUp to 2.7 GHzUp to 3.6 GHz
# of Physical Cores6 (Threads: 12)4 (Threads: 8)
CacheL1: 384KB, L2: 1.5MB, L3: 12MBL1: 256KB, L2: 1.0MB, L3: 10MB
TDP80W140W
Yearly Running Cost$14.60$25.55
Other
First Seen on ChartQ2 2011Q3 2014
# of Samples1021149
CPU Value36.636.8
Single Thread Rating(% diff. to max in group)1134(-43.5%)2007(0.0%)
CPU Mark(% diff. to max in group)5019(-28.1%)6984(0.0%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 14th of March 2025 - Higher results represent better performance
Intel Xeon E5645 @ 2.40GHz
5,019
Intel Xeon E5-1620 v3 @ 3.50GHz
6,984
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 14th of March 2025 - Higher results represent better value
Intel Xeon E5645 @ 2.40GHz
36.6
Intel Xeon E5-1620 v3 @ 3.50GHz
36.8
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 14th of March 2025 - Higher results represent better performance
Intel Xeon E5645 @ 2.40GHz
1,134
Intel Xeon E5-1620 v3 @ 3.50GHz
2,007
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 E5645 @ 2.40GHz Intel Xeon E5-1620 v3 @ 3.50GHz
Max TDP80W140W
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.