Is there a way to check which HDMI version a computer contains?
--
<Bill>

Brought to you from Anchorage, Alaska

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Bill Bradshaw <bradshaw@gci.net> wrote:

Is there a way to check which HDMI version a computer contains?

Go to the manufacturer's web site for the motherboard or video card (you
didn't say *where* was the HDMI output) to look up its specifications,
or do an online search on your make and model for the specifications.

https://www.google.com/search?q=hdmi%20specifications

Add the brand and model of computer (if a pre-built), or motherboard (if
using its HDMI port), or video card (if using its HDMI port) to the
search criteria.

The HDMI of the output port doesn't mandate the HDMI the cable support
the same HDMI spec, so you also need to check the specs on the cable.

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On Thu, 8/22/2024 12:35 PM, Bill Bradshaw wrote:

Is there a way to check which HDMI version a computer contains?

Do a search on your graphics card model, using site:techpowerup.com

The first example, is the iGPU in my 5700G. I think actually, I might have
had to peruse the AMD site to get the actual information.

https://www.techpowerup.com/gpu-specs/radeon-graphics-512sp.c3768

Board Design

Slot Width IGP

TDP 45 W

Outputs
Motherboard Dependent <=== not really, there are specs for HDMI and DP
Output rate drops, as more monitors added.

https://www.techpowerup.com/gpu-specs/geforce-rtx-4090.c3889

Outputs
1x HDMI 2.1 \___ More typically, you get solid information
3x DisplayPort 1.4a / The 4090 is actually missing a high refresh rate someone was
expecting, so the 4090 does not have a "spotless" record on this.

*******

It turns out, the internal GPU on my CPU is rather convoluted and bug-filled, thanks to driver maturity. As I would suspect, I can take a stab at
getting "max capability", using a DP to HDMI adapter. Convert from DP, to
the intended interface type.

https://samcui.com/post/set-4k-10bit-120hz-via-hdmi-with-ryzen-5700g-a520/

There's no proof here that this adapter is active. All of it could be
explained by DP++ compatibility mode operation.

https://www.aliexpress.com/item/1005005985322036.html

This one might be active. Hard to say really. Having the pretense of a LED, doesn't mean it uses electrical power. Electrical power usage would mean it
is an active adapter.

"Cable Matters 8K DisplayPort 1.4 to HDMI 2.1 Adapter"

https://www.amazon.ca/Cable-Matters-102101-BLK-Computer-Adapter/dp/B08XFSLWQF

Paul

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On Fri, 8/23/2024 6:24 PM, Paul wrote:

On Thu, 8/22/2024 12:35 PM, Bill Bradshaw wrote:

Is there a way to check which HDMI version a computer contains?

This device is discontinued, but it represents an example of
an output tester. It is not capable of testing at the very latest
standard, but it's still pretty good for what it does and
the price. But presumably the chip inside it is using, either
cannot be obtained, or there was some issue with HDCP keys it
was using. I don't know if you can extract all the parametrics
from a signal, while HDCP is running (encryption) and you don't have
keys to use.

https://www.siig.com/hdmi-meter-tester-with-digital-indicator.html

The other way to do it, is pass the signal to an AV Receiver,
but if you do that, maybe the downstream EDID affects the
rates it tries to run at ? It should not have a particular
reason to be asking for 8K at 120Hz. But apparently, the
display on the AVR can give some details about an HDMI plugged
into it.

Looking up the video card, is a possible way to do it, but the
driver and the internal operation of the device (bad crossbar
design on an iGPU) means there is still some risk when you
get your shiny new LCD monitor, that the desired rate just
isn't there.

An iGPU, it was estimated in the past that it would use
1GB per second of memory bandwidth, to drive some outputs.
You would have to do the math, to figure out what the impact
would be, of an extravagant format. A PCIe video card on the other
hand, has a couple hundred GB/sec bandwidth to the VRAM, so
the crossbar has a rather unlimited bandwidth to work with.
You could, for example, run three 4K monitors in Eyefinity.
Computer games think it is a special monitor which is 11520 wide.
On some recent card, it was claimed the crossbar counter
went up to 16K or so. Three 8K monitors would be unlikely
to work as a panorama, until the crossbar is made even wider.

It's possible the fastest low amplitude signal at the moment
is USB4 at 120Gbit/sec. I don't think video outputs are there yet.
And video outputs are forced to operate over longer distances
than perhaps a USB4 would. I doubt USB4 cables will be allowed
to be super-long. Even if it has preemphasis, the attenuation
is just too high for miracles to happen.

Paul

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Paul wrote:

On Fri, 8/23/2024 6:24 PM, Paul wrote:

On Thu, 8/22/2024 12:35 PM, Bill Bradshaw wrote:

Is there a way to check which HDMI version a computer contains?

This device is discontinued, but it represents an example of
an output tester. It is not capable of testing at the very latest
standard, but it's still pretty good for what it does and
the price. But presumably the chip inside it is using, either
cannot be obtained, or there was some issue with HDCP keys it
was using. I don't know if you can extract all the parametrics
from a signal, while HDCP is running (encryption) and you don't have
keys to use.

https://www.siig.com/hdmi-meter-tester-with-digital-indicator.html

The other way to do it, is pass the signal to an AV Receiver,
but if you do that, maybe the downstream EDID affects the
rates it tries to run at ? It should not have a particular
reason to be asking for 8K at 120Hz. But apparently, the
display on the AVR can give some details about an HDMI plugged
into it.

Looking up the video card, is a possible way to do it, but the
driver and the internal operation of the device (bad crossbar
design on an iGPU) means there is still some risk when you
get your shiny new LCD monitor, that the desired rate just
isn't there.

An iGPU, it was estimated in the past that it would use
1GB per second of memory bandwidth, to drive some outputs.
You would have to do the math, to figure out what the impact
would be, of an extravagant format. A PCIe video card on the other
hand, has a couple hundred GB/sec bandwidth to the VRAM, so
the crossbar has a rather unlimited bandwidth to work with.
You could, for example, run three 4K monitors in Eyefinity.
Computer games think it is a special monitor which is 11520 wide.
On some recent card, it was claimed the crossbar counter
went up to 16K or so. Three 8K monitors would be unlikely
to work as a panorama, until the crossbar is made even wider.

It's possible the fastest low amplitude signal at the moment
is USB4 at 120Gbit/sec. I don't think video outputs are there yet.
And video outputs are forced to operate over longer distances
than perhaps a USB4 would. I doubt USB4 cables will be allowed
to be super-long. Even if it has preemphasis, the attenuation
is just too high for miracles to happen.

Paul

The graphics chip in the laptop is an RTX 4060 and if I had looked that up I would seen it is HDMI 2.1.

Sometimes the brain is late to work. Also need to remember the advice the connecting cable is important and is restricted to 6.6 feet.
--
<Bill>

Brought to you from Anchorage, Alaska

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