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Intel Xeon E5645 vs AMD Opteron 4284

The AMD Opteron 4284 is newer than Intel Xeon E5645 @ 2.40GHz and is around -6% slower in multi-threaded (CPU Mark) testing. However the CPUs have comparable single-thread rating. Also, AMD Opteron 4284 uses around 17% more power. All the CPUs in this comparison belong in the Server CPU Class. The values below were tabulated from a combined 109 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×AMD Opteron 4284+ ADD
Price Search Online $44.95 - BUY
Socket TypeLGA1366Socket C32
CPU ClassServerServer
Clockspeed2.4 GHz3.0 GHz
Turbo SpeedUp to 2.7 GHzUp to 3.3 GHz
# of Physical Cores6 (Threads: 12)8 (in 4 physical modules)
CacheL1: 384KB, L2: 1.5MB, L3: 12MBL1: 640KB, L2: 16.0MB, L3: 6MB
TDP80W95W
Yearly Running Cost$14.60$17.34
Other
First Seen on ChartQ2 2011Q1 2013
# of Samples1081
CPU Value36.3103.8
Single Thread Rating(% diff. to max in group)1134(-4.0%)1181(0.0%)
CPU Mark(% diff. to max in group)4972(0.0%)4665(-6.2%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 14th of July 2025 - Higher results represent better performance
Intel Xeon E5645 @ 2.40GHz
4,972
AMD Opteron 4284
4,665
PassMark Software © 2008-2025
CPU Value (CPU Mark / $Price)
As of 14th of July 2025 - Higher results represent better value
Intel Xeon E5645 @ 2.40GHz
36.3
AMD Opteron 4284
103.8
PassMark Software © 2008-2025
CPU Single Thread Rating
As of 14th of July 2025 - Higher results represent better performance
Intel Xeon E5645 @ 2.40GHz
1,134
AMD Opteron 4284
1,181
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 AMD Opteron 4284
Max TDP80W95W
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.