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ASUS X99-E-10G WS Workstation Motherboard Review

By: Steven Bassiri | Socket LGA 2011 in Motherboards | Posted: Nov 1, 2016 4:50 pm
TweakTown Rating: 92%Manufacturer: ASUS

Circuit Analysis

 

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The most interesting parts of the X99-E-10G are found when you remove the heat sinks.

 

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The CPU input voltage gets a 8 true phase voltage regulator module controlled by an 8-phase digital PWM, most likely from Infineon/IR (it's an ASUS rebrand so we don't know exactly what it is). Each phase gets an integrated power stage, gold plated high current 60A inductor, and a mixture of tantalum capacitors and MLCCs for the output capacitor bank. Two high current 8-pin connectors can feed up to 600W into this beat of a VRM.

 

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The CPU and memory VRMs both use ASUS's rebranded PWMs, but they all use International Rectifier (now owned by Infineon) IR3550 60A high current fully integrated power stages. These are some of the best in the business and are server grade. Power is not your limiting factor for overclocking the CPU or memory on the X99-E-10G WS. It's also worth noting that ASUS isn't using the 10K gun-metal capacitors but instead uses higher quality 12K FP capacitors.

 

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The two 10Gbit ports are from the Intel ELX550AT 10Gbit NIC which has its own VRM to supply the 11W maximum power usage. It's designed for use in high-performance networks, and it's designed to utilize x4 PCI-E 3.0, as much as the Thunderbolt 3 controller. It's optimized for virtualization, and Intel's chip is a leader in the 10G field.

 

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Two Avago PEX8747 takes x16 (or x8 for 28-lane CPUs), and output x32 downstream ports for the PCI-E slots. The motherboard can supply x64 lanes to the PCI-E slots for a crazy amount of reconfigurability. Each PEX8747 can output 8W, so the PCH/PEX heat sink has two auxiliary heat sinks to help cool everything down. When using PEX8747, motherboard manufacturers must also use dedicated clock buffers to keep the PCI-E clock constant, and both of these clock buffers are located on the back of the PCB.

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