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Intel Xeon E5-2643 v4 vs Xeon E3-1275 v6

The Intel Xeon E3-1275 v6 @ 3.80GHz is newer than Intel Xeon E5-2643 v4 @ 3.40GHz and is around -17% slower in multi-threaded (CPU Mark) testing. The Intel Xeon E3-1275 v6 @ 3.80GHz is around 12% faster in single-thread testing. Also, Intel Xeon E3-1275 v6 @ 3.80GHz uses substantially less power. All the CPUs in this comparison belong in the Server CPU Class. The values below were tabulated from a combined 152 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 E5-2643 v4 @ 3.40GHz×Intel Xeon E3-1275 v6 @ 3.80GHz+ ADD
Price $602.1 - BUY Search Online
Socket TypeFCLGA2011-3FCLGA1151
CPU ClassServerServer
Clockspeed3.4 GHz3.8 GHz
Turbo SpeedUp to 3.7 GHzUp to 4.2 GHz
# of Physical Cores6 (Threads: 12)4 (Threads: 8)
CacheL1: 384KB, L2: 1.5MB, L3: 20MBL1: 256KB, L2: 1.0MB, L3: 8MB
TDP135W73W
Yearly Running Cost$24.64$13.32
Other
First Seen on ChartQ2 2016Q2 2017
# of Samples7973
CPU Rank15161675
CPU Value18.318.5
Single Thread Rating(% diff. to max in group)2261(-10.5%)2527(0.0%)
CPU Mark(% diff. to max in group)11037(0.0%)9206(-16.6%)
1 - Last seen price from our affiliates NewEgg.com & Amazon.com.

CPU Mark Rating
As of 17th of March 2026 - Higher results represent better performance
Intel Xeon E5-2643 v4 @ 3.40GHz
11,037
Intel Xeon E3-1275 v6 @ 3.80GHz
9,206
PassMark Software © 2008-2026
CPU Value (CPU Mark / $Price)
As of 17th of March 2026 - Higher results represent better value
Intel Xeon E5-2643 v4 @ 3.40GHz
18.3
Intel Xeon E3-1275 v6 @ 3.80GHz
18.5
PassMark Software © 2008-2026
CPU Single Thread Rating
As of 17th of March 2026 - Higher results represent better performance
Intel Xeon E5-2643 v4 @ 3.40GHz
2,261
Intel Xeon E3-1275 v6 @ 3.80GHz
2,527
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 E5-2643 v4 @ 3.40GHz Intel Xeon E3-1275 v6 @ 3.80GHz
Max TDP135W73W
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.