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Understanding Gigabyte Motherboard Technical Specifications

Can someone please explain the "maximum resolution" shown against Gigabyte motherboards.  For example:

Z790 AORUS MASTER X
- LGA1700 socket: Support for the 14th, 13th, and 12th Generation Intel® Core™
- Integrated Graphics Processor-Intel® HD Graphics support:
       1x DisplayPort, supporting a maximum resolution of 4096x2304@60 Hz
       * Support for DisplayPort 1.2 version and HDCP 2.3

Z790 AORUS XTREME X
- LGA1700 socket: Support for the 14th, 13th, and 12th Generation Intel® Core™
- 2 x Intel® Thunderbolt™ 4 connectors (USB Type-C® ports), supporting DisplayPort and Thunderbolt™ video outputs and a maximum resolution of 5120x2880@60 Hz with 24 bpp (via single display output)
* Support for DisplayPort 1.4 version and HDCP 2.3

Lets assume the same processor was used with both these boards:
--Intel Core i9 I4900K which has Intel® UHD Graphics 770

My question is: What is it that "restricts" the resolution of any monitor connected to the board?  Is it the version of DisplayPort (1.4 v 1.2) or is it the processor, which in this case has a UHD Graphics 770 capability?

I want to build a system that is capable of running one of the newer 49" UHD 5K monitors, which run at a minimum resolution of 5120 x 1440 @ 60Hz.  I do NOT want to have to use a GPU and only want onboard graphics, so the motherboard is key to doing this. 

So, according to the two motherboard specifications above, only the Z790 AORUS XTREME X would be capable of supporting this monitor without an additional GPU.

Is that correct?

Also, what does this mean on the specification:  "(Graphics specifications may vary depending on CPU support.)"  This seems a little vague!

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Re: Understanding Gigabyte Motherboard Technical Specifications
« Reply #2 on: June 04, 2024, 09:34:23 pm »
Hi, thanks for the link to the CPU, but I am aware of the details of that CPU and it is the motherboard restrictions I'm trying to understand, in the area of resolution.

So, the CPU provides the following graphics resolutions:

Max Resolution (HDMI)‡ 4096 x 2160 @ 60Hz
Max Resolution (DP)‡ 7680 x 4320 @ 60Hz
Max Resolution (eDP - Integrated Flat Panel)‡ 5120 x 3200 @ 120Hz

Why do even the latest Gigabyte motherboard specifications show figures that are much less than these and are even lower for some of the boards?

Is this just a feature of Gigabyte motherboards not being very good at supporting the latest HDMI, Displayport or Thunderbolt 4 specifications as I'm assuming it is these aspects of the motherboard that are throttling their graphics capabilities, since the CPU is MUCH more capable?
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Re: Understanding Gigabyte Motherboard Technical Specifications
« Reply #3 on: June 06, 2024, 05:53:40 am »
Greetings,
The native resolution of the monitor will determine the maximum resolution that can be displayed in this case.

The chipset can support up to 5120 x 2880 @ 60Hz.  Whatever the monitors native is will be what the 790 chipset will display. 
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