Intel Xeon E5-4640 v3 

Released April, 2015
  • 1.9 GHz
  • Duodeca core

For example, the on-die bus has been updated to include two fully buffered rings, a necessary addition to support the extreme core counts launching today.
by Ryan-Shrout (Sep, 2014)
These interconnects allow for faster core communication with a more direct link using dual rings with bi-directional interconnects.
by William-Harmon (Sep, 2014)

Features Key features of the Intel Xeon E5-4640 v3

clock speed

Xeon E5-4640 v3
1.9 GHz
Xeon E5-4640
2.4 GHz
Xeon E5-4650 v3
2.1 GHz

turbo clock speed

Xeon E5-4640 v3
2.6 GHz
Xeon E5-4640
2.8 GHz
Xeon E5-4650 v3
2.8 GHz


Xeon E5-4640 v3

In The News From around the web


Intel Announces Xeon E7 v3 Processors Based on Haswell-EX

by Scott Michaud |
The E7-8880L v3 is a low power version, relatively speaking, which will also contains eighteen cores that are clocked at 2.0 GHz.
The largest model is the E7-8890 v3, which contains eighteen cores fed by a total of 45MB in L3 cache.
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.
The previous Ivy Bridge-EX flagship had 4.31 Billion transistors configured on a 541mm2 so its easy to tell that the Haswell-EP takes die size and transistor count to a new level.
The Xeon E5-2600 V3 lineup is going to be aimed at the HPC server and workstation market featuring 23 E5-2600 V3 SKUs including the flagship Xeon E5-2699 V3 which boasts 18 Cores, 36 threads, 45 MB of L3 cache and a high price of $4115 US.
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 1.9 GHz
Turbo clock speed 2.6 GHz
Cores Duodeca core


Has a NX bit Yes
Supports trusted computing Yes
Has virtualization support Yes
Instruction set extensions
  1. AES
  2. AVX
  3. AVX 2.0
Supports dynamic frequency scaling Yes

memory controller

Memory controller Built-in
Channels Quad Channel
Supports ECC Yes
Maximum memory size 786,432 MB


Architecture x86-64
Threads 24 threads
Manufacture process 22 nm
Max CPUs 4
Operating temperature Unknown - 77.6°C

integrated graphics

GPU None

power consumption

TDP 105W
Annual home energy cost 25.29 $/year
Annual commercial energy cost 91.98 $/year
Typical power consumption 85.31W


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