9950x3d on a crosshair x870e extreme.
Edit: add last pic
Hello nightdream and n0pslide.
n0pslide - Your post is helpful because the ASUS manual shows max 4k 60Hz over HMI 2.1 for your motherboard as well as the B850 motherboards.
Looks like it depends more on the cpu and display.
nightdream - you should be able to get 4k 120Hz with your 8700G and 4k 120Hz TV.
Hi Nate152. The official specs discrepancy got me confused too. Clearly the onboard HDMI support is aligned with HDMI2.1 specs so here's a 12 bit option for HDMI PC-monitor connection. It needs 38.73 Gbps which is well under the HDMI2.1 effective 42.67 Gbps bandwidth so we stay uncompressed.
I tested an expensive X870E Aorus Master and unfortunatelly can't output 4K 120HZ. HDMI is limited to 18GBPS, confirming its official Specs. Tried everything, Adrenalin drivers, Bios update/downgrade, chipset drivers. Custom Resolution Utility. Stuck on 4K@60... Photos attached.
Anyone else who owns an ASUS B850/X870/E can confirm that it can do 4K 120hz 10bit color via onboard HDMI port ?
I'm a bit confused abt your persistence here... Your mobo specs say 4096 x 2560 at 60Hz and your perils confirm exactly that... The undocumented onboard HDMI blessings u see in my earlier responses might just be courtesy of Asus and not available to Gigabyte users. Time to jump ships bruh.
P.S. But if u really wanna know what's going on, here's the punchline: the onboard HDMI u using on Gigabyte x870e Aorus Master is just an HDMI 2.0 port marketed as HDMI 2.1. Yes, they did u dirty. Asus' stating the incorrect onboard HDMI capabilities in my mobo specs yields only bonus - the port exceeds the stated 4K@60Hz by delivering 4K@120 12bit RGB444 UNCOMPRESSED. "Underpromise and overdeliver" maybe? - Dunno, but it's not the first time such "easter eggs" pop up in Asus products and they obviously carry no malicious intent. Here's how Gigabyte legally f#cked u: NONE of HDMI 2.1 spec features is mandatory, so conforming to the 2.1 standard (and marketing the product as such) requires implementing at least a whatever one of them. The manufacturers also required to mention the feature(s) so let's take a look at Aorus master official specs:
Ok, here it is: HDCP2.3. The 2.0 HDMI supports only HDCP2.2. That alone gives Gigabyte the green light to market it as HDMI 2.1. I guess it also supports dynamic HDR formats (Dolby Vision, HDR10+ etc) cause that's the difference between the HDMI 2.0 and 2.1 HDR support, but whatever - the specs don't elaborate so I won't be surprised if they f#cked u here as well. In that screenshot I've highlighted the real gem cause this epitome of аssholeness deserves a trophy: "Support for native HDMI 2.1 TMDS compatible ports". What does that even mean?! - First off, TMDS is an older HDMI 2.0 protocol that was replaced by FRL in HDMI 2.1 and since HDMI 2.1 is the superset of HDMI 2.0 (that will use TMDS as a fallback for lower speeds) which makes that absolutely unnecessary phrase Gigabyte plugged into description nothing but a carefully worded move to confuse u by utilizing "HDMI 2.1" and "ports" in close proximity when it literally means "don't trip if your display has an HDMI 2.1 but transfers at HDMI 2.0 speed - we got this". Thank you Captain Obvious, the HDMI 2.1 inherent backwards compatibility already told us as much. All HDMI 2.1 and 2.0 ports are capable of TMDS. All HDMI 2.1 ports are cool with HDMI 2.0 ports. But there's only one legit reason when two HDMI 2.1 ports will be talking over TMDS: slow-аss cable. Or just a crаppy one. But that also goes without saying. There's also another less-legit reason that might be at hand and in that case that highlighted part means "if your display manufacturer is bullsh!tting u the same way we are, don't be surprised if u see two "HDMI 2.1" ports communicating over TMDS - we support it". If irony was made out of strawberries we'd all be eating a whole lot of shortcakes right now. Did I mention jumping ships? - Do it.
