Intel Xeon E5-2643 

Released March, 2012
  • 3.3 GHz
  • Quad core
5.6 Out of 10

Clock speed has clearly been traded in for more cores in most of server SKUs.
by Johan-De-Gelas (Sep, 2014)
Take the following graph with a grain of salt as the benchmark is not the most accurate (results tend to vary by 5-8%), but still it gives a rough idea of what you can expect.
by Johan-De-Gelas (Sep, 2014)

CPUBoss Review Our evaluation of the Intel Xeon E5-2643 among all CPUs


Benchmark performance using all cores

Xeon E5-2643
PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

Single-core Performance

Individual core benchmark performance

Xeon E5-2643
PassMark (Single Core), Geekbench 3 Single Core and 1 more

Integrated Graphics

Integrated GPU performance for graphics

Xeon E5-2643
Sky Diver and Cloud Gate

Integrated Graphics (OpenCL)

Integrated GPU performance for parallel computing

Xeon E5-2643
CompuBench 1.5 Face detection and 4 more

Performance per Watt

How efficiently does the processor use electricity?

Xeon E5-2643
Overall Performance and TDP


Are you paying a premium for performance?

Xeon E5-2643
Overall Performance and Price


CPUBoss Score

Combination of all six facets

Xeon E5-2643

Benchmarks Real world tests of the Intel Xeon E5-2643

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon E5-2643

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon E5-2643

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E5-2643
2,195,000 MB/s
Xeon E5 2630 v2
1,750,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Xeon E5-2643


Xeon E5-2643

PassMark Data courtesy Passmark

Xeon E5-2643

PassMark (Single Core)

Xeon E5-2643

In The News From around the web


Intel Xeon E5 Version 3: Up to 18 Haswell EP Cores

by Johan De Gelas |
However, it's not a case of the Haswell's L3 cache being a lot worse: the 20MB L3 cache of the Xeon E5-2667 v3 is only slightly slower than the Xeon E5-2690 and is still faster than the Xeon E5-2697 v2 (30MB).
Of course, those kind of bandwidth numbers only matter for specific HPC benchmarks as the L3 cache (30-45MB L3) will take care of most of the requests.

Intel Broadwell-EP Xeon E5 v4 Because Why Not?

by Scott Michaud |
They claim it will be Intel's first 14nm Xeon processor which obviously suggests that it will not be preceded by Broadwell in the lower performance server categories.
Intel will apparently allow Haswell and Broadwell to give off a little more heat than their predecessors.

Specifications Full list of technical specs


Clock speed 3.3 GHz
Turbo clock speed 3.5 GHz
Cores Quad core
Socket type LGA 2011


Has a NX bit Yes
Supports trusted computing Yes
Has virtualization support Yes
Instruction set extensions
  1. MMX
  2. AES
  3. SSE
  4. SSE2
  5. SSE4.1
  6. SSE3
  7. Supplemental SSE3
  8. SSE4.2
  9. AVX
Supports dynamic frequency scaling Yes

power consumption

TDP 130W
Annual home energy cost 31.32 $/year
Annual commercial energy cost 113.88 $/year
Performance per watt 6.7 pt/W
Typical power consumption 105.63W

memory controller

Memory controller Built-in
Memory type
  1. DDR3-1600
  2. DDR3-1333
  3. DDR3-1066
  4. DDR3
  5. DDR3-800
Channels Quad Channel
Supports ECC Yes
Maximum bandwidth 51,200 MB/s
Maximum memory size 393,216 MB


Architecture x86-64
Threads 8 threads
L2 cache 1 MB
L2 cache per core 0.25 MB/core
L3 cache 10 MB
L3 cache per core 2.5 MB/core
Manufacture process 32 nm
Max CPUs 2
Clock multiplier 35
Voltage range 0.6 - 1.35V
Operating temperature Unknown - 73°C


Overclocked clock speed 3.3 GHz
Overclocked clock speed (Water) 3.3 GHz
PassMark (Overclocked) 1,374.7
Overclocked clock speed (Air) 3.3 GHz

integrated graphics

GPU None


Architecture QPI
Data rate 64,000 MB/s
Transfer rate 8,000 MT/s
Clock speed 4,000 MHz
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