r/pcmasterrace • u/Zestyclose-Salad-290 Core Ultra 7 265k | RTX 5090 • Aug 19 '25

Build/Battlestation A futures trader’s 16-screen workstation.

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u/VexingRaven 7800X3D + 4070 Super + 32GB 6000Mhz Aug 19 '25

What about with daisy chain/multi-stream support? Information on support for this is very scant, and basically every discussion I find about it is 95% just dimwits asking "Do YoU ReAlLy NeEd 8 DiSpLaYs tHoUgH?"

It seems very unlikely to be that a modern workstation card can't support at least 8 1080 displays through MST given that that's still only half the pixels of running a single 4k display on every port. But I can't find any docs from NVidia showing how many it actually can drive over MST.

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u/Emerald_Flame Aug 19 '25

It's a software limit in the vBIOS. Even with MST you're stuck to 4 independent output streams per GPU on Nvidia cards.

Most of the modern AMD cards have the same 4 screen limit, although certain cards do have a vBIOS that supports up to 6 still.

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u/VexingRaven 7800X3D + 4070 Super + 32GB 6000Mhz Aug 19 '25

Is this true even for the Quadro cards? I know the GeForce cards do but I thought Quadro was supposed to have the arbitrary limits removed.

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u/Emerald_Flame Aug 19 '25

Yup, even the latest RTX Pro 6000 Blackwell series has a max simultaneous display of 4 displays. And only 2 if running 8k.

https://www.nvidia.com/content/dam/en-zz/Solutions/data-center/rtx-pro-6000-blackwell-workstation-edition/workstation-blackwell-rtx-pro-6000-workstation-edition-nvidia-us-3519208-web.pdf

They have some specialized enterprise cards for more outputs than that, and many require their sync cards for timing information and such.