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ASRock X99E-ITX/ac Mini-ITX (Intel X99) Motherboard Review

By: Steven Bassiri | Socket LGA 2011 in Motherboards | Posted: Apr 29, 2015 2:05 pm
TweakTown Rating: 91%Manufacturer: ASRock

Circuit Analysis

 

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In this section I will start off with the voltage regulators and then move to other important circuits.

 

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This board has a very powerful VRM, capable of 650W (calculated using the same method as ASRock uses for their 1300W claim on their other X99 motherboards). ASRock is using 60A low profile power inductors. Twelve low profile POSCAP tantalum capacitors are used for a total of 3960uF output capacitance. Each of the power stages is fully integrated to save board real-estate.

 

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ASRock has been using the Intersil ISL6379 Digitally Controlled 6-Phase PWM for most of its X99 lineup. It's a very good PWM with many of the latest technologies. For the power stages, ASRock is using the Fairchild DrMOS, FDMF5821DC, which is capable of 60A. Judging by the datasheet, this DrMOS has low power loss at high current ratings.

 

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The memory VRM is powered by two Texas Instruments CSD87588N NexFETs, and controlled by a AMPW8720D which is a single phase buck controller. The DDR4 VPP rail is supplied by MPS MPQ8632 step-down converter.

 

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Another MPS MPQ8632 is used for the PCH power.

 

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This is the ASMedia ASM1142 which is a USB 3.1 controller connected to the backpanel USB 3.1 ports.

 

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A Realtek ALC1150 is complemented by five Nichicon high quality electrolytic audio capacitors. A Texas Instruments NE5532 is located on the back of the board and amplifies the front panel audio output signal.

 

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An Intel i218v is Intel's latest PHY to compliment the GBit MAC in the PCH; it provides one 1GBit NIC port. The other port is driven by an Intel i211AT.

 

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This ASMedia 1480 PCI-E quick switch allows for the teaming of the two Intel NICs. A Winbond 128Mbit (16MB) BIOS ROM is located in a DIP socket so it can be replaced if needed.

 

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The nuvoTon NCT6791D handles SuperIO tasks (voltage and temperature monitoring and fan support) and supports the PS/2 keyboard or mouse port on the backpanel.

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