Intel Xeon E3-1275 v3 

Released April, 2013
  • 3.5 GHz
  • Quad core
8 Out of 10

The price difference between the 14 core model and the 16 core model is nearly $1000, making budgets and workloads being important factors in this decision.
by Ian-Cutress (Nov, 2014)
It turns out that when you have up to 18 cores on a single die, this ability is crucial to supporting maximum performance on a wide array of compute workloads and to maintain power efficiency.
by Ryan-Shrout (Sep, 2014)

CPUBoss Review Our evaluation of the Intel Xeon E3-1275 v3 among all CPUs


Benchmark performance using all cores

Xeon E3-1275 v3
PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

Single-core Performance

Individual core benchmark performance

Xeon E3-1275 v3
PassMark (Single Core), Geekbench 3 Single Core and 1 more

Integrated Graphics

Integrated GPU performance for graphics

Xeon E3-1275 v3
Sky Diver and Cloud Gate

Integrated Graphics (OpenCL)

Integrated GPU performance for parallel computing

Xeon E3-1275 v3
CompuBench 1.5 Bitcoin mining and 4 more

Performance per Watt

How efficiently does the processor use electricity?

Xeon E3-1275 v3
Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more


Are you paying a premium for performance?

Xeon E3-1275 v3
Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more


CPUBoss Score

Combination of all six facets

Xeon E3-1275 v3

Benchmarks Real world tests of the Intel Xeon E3-1275 v3

CompuBench 1.5 (Bitcoin mining) Data courtesy CompuBench

Xeon E3-1275 v3
16.57 mHash/s
Core i7 6700K
33.21 mHash/s
Core i7 4770K
16.33 mHash/s

CompuBench 1.5 (Ocean surface simulation) Data courtesy CompuBench

Xeon E3-1275 v3
270 fps
Core i7 6700K
299.12 fps
Core i7 4770K
244.75 fps

CompuBench 1.5 (T-Rex) Data courtesy CompuBench

Xeon E3-1275 v3
1.76 fps
Core i7 4770K
1.97 fps
Core i7 6700K
1.8 fps

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon E3-1275 v3
Core i7 6700K
Core i7 4770K

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon E3-1275 v3
Core i7 6700K

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E3-1275 v3
4,185,000 MB/s
Core i7 6700K
5,980 MB/s
Core i7 4770K
4,810,000 MB/s

PassMark Data courtesy Passmark

Xeon E3-1275 v3
Core i7 4770K

PassMark (Single Core)

Xeon E3-1275 v3

In The News From around the web


Intel Haswell-EP Xeon 14 Core Review: E5-2695 V3 and E5-2697 V3

by Ian Cutress |
The prevalence of multithreaded code is server and workstation environments make the frequency difference extremely important, especially when it comes to the types of workloads that have frequent memory delays and accesses.
If it happens in a core as part of the logic or caches, that core can be fused off and the die can sold as a lower core part.

Eighteen-core Xeon E7 v3 Based on Haswell-EX in Q2'15

by Scott Michaud |
If that is not enough cores, then you can pick up an eight-socket motherboard and load it up with multiple of these.
While Ivy Bridge-EX was available with up to 15 physical cores per processor, double that with HyperThreading, Haswell-EX is increasing that to 18, or 36 simultaneous threads with HyperThreading.
This chart shows how an aggressor VM can start to degrade performance until cache monitoring detects this, partitions the cache, and restores packet performance.
The core will slow during the execution of the AVX instruction in order to maintain TDP limits, which may cause the frequency to drop.
For a workstation or server builder, in the 2S market, Haswell-EP offers an unmatched combination of performance and features.
Obviously the efficiency improvements that you get with AVX code will more than make up for the clock speed differences.

Specifications Full list of technical specs


Clock speed 3.5 GHz
Turbo clock speed 3.9 GHz
Cores Quad core


Has a NX bit Yes
Supports trusted computing Yes
Has virtualization support Yes
Instruction set extensions
  1. MMX
  2. EM64T
  3. SSE4.2
  4. Supplemental SSE3
  5. AVX 2.0
  6. SSE4.1
  7. AVX
  8. SSE
  9. SSE4
  10. F16C
  11. FMA3
  12. AES
  13. SSE3
  14. SSE2
Supports dynamic frequency scaling Yes

power consumption

Annual home energy cost 20.24 $/year
Annual commercial energy cost 73.58 $/year
Performance per watt 14.34 pt/W
Typical power consumption 68.25W


Architecture DMI
Transfer rate 5,000 MT/s


Architecture x86-64
Threads 8 threads
L3 cache 8 MB
L3 cache per core 2 MB/core
Manufacture process 22 nm
Max CPUs 1


Overclocked clock speed 3.88 GHz
Overclocked clock speed (Water) 3.5 GHz
Overclocked clock speed (Air) 3.88 GHz

integrated graphics

Label Intel® HD Graphics P4600
Number of displays supported 3
GPU clock speed 350 MHz
Turbo clock speed 1,250 MHz

memory controller

Memory controller Built-in
Memory type
  1. DDR3-1600
  2. DDR3-1333
  3. DDR3
Channels Dual Channel
Supports ECC Yes
Maximum bandwidth 25,600 MB/s
Maximum memory size 32,768 MB
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