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ASUS P9X79-E WS Motherboard Review

Posted January 14, 2014 by Kenny in CPU & Motherboards


Price at time of Review: $469.99 on Newegg.com


Feature and Performance Packed, Intuitive Software package, Large CPU and Memory Support List and Overclocking Stable


A bit expensive, but makes sense for a workstation motherboard
ASUS Workstation platform hits the mark with great feature and performance capabilities without compromise. This is a must have for all WS builders!
by Kenny
Full Article
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Package and Contents

The packaging from ASUS holds no surprises. We have seen ASUS continue to strive to include interesting cover art. While it’s nothing to really get excited about, we have come to know and appreciate that distinctive “ASUS look.” On the front cover we find all the at a glance information clearly printed. One of the major stand outs is the 4 way X16 graphics card link, and that it’s PCIe 3.0 compliant.

At the rear of the package, Asus goes into a little more detail and explains the motherboard’s layout, features and performance benefits. Again, this is all great at a glance information for those looking to pick this up from a retail store or B&M.

Before we move to the included contents, we have one more quick addition that ASUS has added to the package. There is a flap that flips open and explains each benefit and feature in detail.

Moving to the inside and the contents that were included, we find an abundance of accessories that ASUS has included. From (left to right), we have the drivers disc, SATA Power cable, Instruction manual, 10 SATA cables, SLI 2-way, 3-way and 4-way bridges, I/O Panel, USB PCI adapter and Front adapter ports for cable management.

While some may not use ALL of this included, its great to see that ASUS spared no expense in providing them.


Let’s move forward and take a look at the Specifications and Features of the motherboard.


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    If the P9X79-E WS only has 40 PCI-E 3.0 lanes… then how does it run 3-way SLI or 4-way SLI at x16 speeds? I thought that it had to equal the total number of lanes (i.e., 40)? So then 40 lanes would be achieved by:

    3-Way SLI: x16 +x8 +x16 = 40 lanes
    4-Way SLI: x16 +x8 + x8 + x8 = 40 lanes

    So how do they pull off 3-Way or 4-Way SLI with each card running at PCI-E 3.0 x16 speed (which would seem to require 48 lanes or 64 lanes respectively)? Am I misunderstanding something?


      Hi Archangel,

      This motherboard uses two PLX PEX 8747 chips to increase the number of PCIe 3.0 lanes on the motherboard from 40 to 72. That is how the board is able to handle the full X16 lanes on the PCIe slots.

      or respectively x16/x16/x16/x16 and x16/x8/x8/x8/x16/x8/x8.
      Sorry this information was not touched on in the review, I will be sure to update it.



    This motherboard uses 2x plx chip to achieve 4 way 16x sli , Asrock extreme 11 uses somthing similar.

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