Hardware Secrets

Home | Camera | Case | CE | Cooling | CPU | Input | Memory | Mobile | Motherboard | Networking | Power | Storage | Video | Other
Content
Articles
Editorial
First Look
Gabriel’s Blog
News
Reviews
Tutorials
Main Menu
About Us
Awarded Products
Datasheets
Dictionary
Download
Drivers
Facebook
Forums
Links
Manufacturer Finder
Newsletter
On The Web
RSS Feed
Test Your Skills
Twitter
Newsletter
Subscribe today!
Search



Recommended
Upgrading and Repairing PCs (21st Edition)
Upgrading and Repairing PCs (21st Edition), by Scott Mueller (Que Publishing), starting at $33.88
Home » CPU
Inside the Intel Haswell Microarchitecture
Author: Gabriel Torres
Type: Tutorials Last Updated: May 31, 2013
Page: 3 of 5
New Dispatch Ports and Execution Units

From the Nehalem microarchitecture on, Intel CPUs have six dispatch ports to connect the CPU’s Reservation Station (where microinstructions awaiting to be processed are stored) to the CPU’s execution units. The Haswell microarchitecture adds two new dispatch ports, increasing the number of microinstructions the Reservation Station can send to the execution units by 33%.

The Haswell microarchitecture has a total of 17 execution units, while the Sandy Bridge and Ivy Bridge microarchitectures have 15 and the Nehalem microarchitecture has 12.

An important enhancement added to the Haswell microarchitecture is the addition of 256-bit datapaths between the Reservation Station and the execution units. The Sandy Bridge and Ivy Bridge microarchitectures use 128-bit datapaths and, therefore, when 256-bit AVX instructions have to be executed, two execution engines must be combined. This doesn’t happen with the Haswell microarchitecture.

Haswell
click to enlarge
Figure 2: New dispatch ports and execution units of the Haswell microarchitecture

« Previous |  Page 3 of 5  | Next »
Print Version | Send to Friend | Bookmark Article | Comments (0)

Related Content
  • All Core i3 Models
  • Inside the Intel Ivy Bridge Microarchitecture
  • Core i7-3770K vs. AMD FX-8150 and Core i7-2600K CPU Review
  • ASRock Fatal1ty Z87 Professional Motherboard
  • Intel DZ87KLT-75K Motherboard

  • RSSLatest News
    LUXA2 Releases New P1-PRO Battery Power Pack
    October 1, 2013 - 7:23 AM PST
    MSI unveils GP70 and GP60 Laptops
    September 30, 2013 - 7:23 AM PST
    AMD Unveils Next-Generation Radeon Graphics Cards
    September 27, 2013 - 5:33 AM PST
    Genius Introduces Energy Mouse in North America
    September 27, 2013 - 5:32 AM PST
    Apple Updates iMac
    September 25, 2013 - 5:27 AM PST
    .:: More News ::.




    2004-13, Hardware Secrets, LLC. All rights reserved.
    Advertising | Legal Information | Privacy Policy
    All times are Pacific Standard Time (PST, GMT -08:00)