Question Ryzen 9900X+X870E: Max no. displays from iGPU?

ballerboy · Oct 9, 2024

Does anyone know:

Max no. displays (4K @ 60Hz) supported from integrated graphics on Ryzen 9900X? (I already tried to search, some sources say THREE, other say FOUR, anyone know which is correct?)
Max no. displays (4K @ 60Hz) which can be connected via USB 4 + HDMI ports on X870E Mobo?

I am planning new build using Ryzen 9900X and an X870E Mobo. Will not be used for gaming, for productivity only. I won’t use a graphics card, will rely only on integrated graphics.

I wonder how many displays (4K @ 60Hz) I could drive from the CPU and Mobo? All these Mobos have 1 * HDMI socket and 2 * USB 4 (supporting DP over USB).

In principle, each USB 4 port could output to two 4K @ 60Hz (using an MST USB-C to dual DP adaptor). So I wonder whether it might be possible to drive FOUR, or even FIVE 4K @ 60Hz displays?

Not yet decided which Mobo to buy, will likely choose from one of the below six options:

ASRock X870E Nova WiFi ATX
ASRock X870E Taichi Lite
ASUS ProArt X870E-Creator
GIGABYTE X870E AORUS PRO
GIGABYTE X870E AORUS MASTER
MSI MPG X870E CARBON WIFI

I wonder if anyone has tested max no. of 4K displays which could be connected via any of these Mobos from iGPU?

Tech Junky · Oct 9, 2024

Generally 3 is a safe bet with most modern CPUs. 4 might be a possibility daisy chaining them together.

AMD is as clear as mud on some specs and iGPU being one of them. I've got a 7900X running headless but, hooked up to a 4K120 projector as needed if I need to recover the system.

Out of the MOBOs though I stick with ASRock at this point for price/performance.

The only thing the 870 offers over the 670 is 2 mandatory USB4 ports and all other stuff seems to be the same. If you look at the 670 options you might find a better fit for the display side or something else at a discount.

SamMaster · Oct 9, 2024

Looking at the specs of the boards you listed, the best bet is the Gigabyte Aorus Pro, because the USB-C ports can support officially up to 4k 240Hz, so splitting that up into multiple 4k60 screens should be fine. The MASTER board shouldn't be needed unless you absolutely need what it offers over the pro. The ASRock boards claim to support 8k30 for their USB4, so I'm not sure about 2x4k60. The Asus ProArt board appears to meet your needs, so compare with the gigabyte Aorus Pro for price+features as far as I see. Most boards also have a HDMI 2.1 port that's good enough for a 4k60 screen.

Alternatively a decent X670 or B650 board with a cheap workstation GFX card with 4x display out would be a good potential cost alternative.

You can go with a 8700G CPU, but you give up on some CPU power at that point, and a bit of PCIe lanes.

Question Ryzen 9900X+X870E: Max no. displays from iGPU?

ballerboy

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Tech Junky

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SamMaster

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