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Dual GPU not working on x399 Taichi |
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parsec ![]() Moderator Group ![]() ![]() Joined: 04 May 2015 Location: USA Status: Offline Points: 4996 |
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Does your PSU have enough modular connections for a third video power cable? I wonder if the second "CPU" power cable connection is for the SOC VRM stage, or possibly that and the DRAM VRM. The problem may be really one of power distribution rather than power capacity. It is important to let us know if the third cable allows both video cards to operate correctly. If it doesn't that means the problem might be related to the UEFI/BIOS. The manual states the board's six pin graphics 12V power connector must be used when four video cards are installed. That is to provide additional power to the PCIe slots, which otherwise only get power from the +12V connectors on the main 24 pin ATX connector. There are only three +12V pins on the 24 pin ATX connector, which is not much and explains the need for the CPU power connectors. I am skeptical that two video cards will need the board's 12V power cable connected, but we shall see. You can install Win 10 temporarily without buying a license, just using an ISO download from MSoft. That will work for at least 30 days. The legacy boot thing with Linux should not be an issue, since the UEFI is configured by default to operate in legacy mode. Video cards don't require UEFI, but IF you UEFI boot the PC, then the video card must support UEFI/GOP. Your 1080s ought to do that, unless both of your manufactures are way behind in their VBIOS, which would be ridiculous IMO. |
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noktek ![]() Newbie ![]() Joined: 17 Nov 2017 Status: Offline Points: 10 |
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Threadripper 1950, Asrock Taichi x399, Noctua 14s, Vengeance LPX 64gb 3066, Asus Strix 1080Ti, EVGA 780 SC, Corsair Hx1200, Samsung 960pro 512, evo 1gb, Barracuda 3gb, win10 64, bios 1.8
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noktek ![]() Newbie ![]() Joined: 17 Nov 2017 Status: Offline Points: 10 |
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i mustve been mad the other day, since the card works perfectly fine on my other machine that runs windows 10, that can not be the reason---
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Threadripper 1950, Asrock Taichi x399, Noctua 14s, Vengeance LPX 64gb 3066, Asus Strix 1080Ti, EVGA 780 SC, Corsair Hx1200, Samsung 960pro 512, evo 1gb, Barracuda 3gb, win10 64, bios 1.8
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rhacker382 ![]() Newbie ![]() ![]() Joined: 11 Apr 2019 Location: NY Status: Offline Points: 1 |
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Curious what the result of this was??? I recently installed 2 ASUS GTX1070 and have the exact same problem.
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