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GIGABYTE X399 Designare EX Motherboard Review (Page 4)

By Steven Bassiri | Oct 26, 2017 03:55 pm CDT
Rating: 93%Manufacturer: GIGABYTE

X399 Designare EX Circuit Analysis Continued


We find a dandy Realtek ALC1220 codec with an integrated amplifier and support for up to 120dB SNR. GIGABYTE added some Gold Series Nichicon electrolytic audio capacitors and some WIMA film capacitors to improve audio.


GIGABYTE replaced the single Killer NIC on the Gaming 7 with dual Intel i211AT NICs, and you also get the Intel Wireless AC 8265NGW 2x2 card. If you blue screen booting into Windows 10, go into the UEFI, change memory interleaving to channel mode, and then go into Windows and update the wireless card's drive and then set channel interleaving back to auto. It's an issue most motherboards with this Intel card face. The rear IO USB 3.1 comes from the chipset (FCH) and two Pericom USB 3.1 re-drivers, the PI3EQX are used to improve signal strength. A Texas Instruments HD3220 MUX is used for the type-C switch.


An ITE IT8295FN provides RGB capabilities on the motherboard and through the headers. The ITE IT8951E is a microcontroller responsible for the QFlash+ technology that allows BIOS recovery through a USB stick.


An ITE IT8686E acts as the SuperIO, provides monitoring, some fan control, and the PS/2 port on the rear IO. The ITE IT8795E acts as an embedded controller (like the "EC" temperature headers) and provides extra fan control and functionality. We find a second IT8795E under one of the PCI-E slots.


Two BIOS ROMs are found near the CPU socket, and these 128Mbit/16MB ROMs provide extra protection through firmware redundancy (but I don't think you can switch between them). The internal type-C header is actually USB 3.0 based, and it seems that GBT has implemented some type of repeater of voltage control chip for the signal to the header.

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Steven Bassiri

ABOUT THE AUTHOR - Steven Bassiri

Steven went from a fledgling forum reader in 2003 to one of the internet's brightest stars by 2010. Armed with an information systems degree, a deep understanding of circuitry, and a passion for tech, Steven (handle Sin0822) enjoys sharing his deep knowledge with others. Steven details products down to the component level to highlight seldom explained, and often misunderstood architectures. Steven is also a highly decorated overclocker with several world records under his belt. He brings that knowledge and experience to TweakTown.

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