Display Cable Bandwidth Check?

[Nycz]

As the title says, how do i check what the bandwidth speed i am getting from my hdmi or display port cable so i know if its getting max performance from it?

[KaptCrunch]

first know  cable spec  and length of cable

Edited August 5 by KaptCrunch

[BUDMAN]

The best thing you can do is drop COMCAST

[KaptCrunch]

20 hours ago, Nycz said:

As the title says, how do i check what the bandwidth speed i am getting from my hdmi or display port cable so i know if its getting max performance from it?

need special equipment or a $70 hand held unit 

search your local area for those services 

[KaptCrunch]

@BUDMAN   don't make jealous with those speeds , nycz was talking hdmi speed for streaming i guess  no stutter 

Edited August 5 by KaptCrunch

[crimson]

Krunch was right, it is the spec of the cable. Plus need to know the spec of the monitor. If the cable is higher than the monitor can display, the display will throttle.

 

[BUDMAN]

The last monitor I bought came with 2 different cables, one for hdmi and display port...

[Nycz]

I know the specs of cables but that doesn't mean it's what I am getting to the pc. I don't have amd GPU anymore and when I did it's software showed the speeds of cable I was getting. Don't see it on Nvidia control panel/app or GPUz.

[srt4fun]

GPU-Z will show current link speed in the 'Advanced' tab

Edit: Just noticed that it doesn't show my secondary monitor connected via HDMI in that section. So maybe it only displays info for DP connections....or the fact that my 2nd monitor is very old and uses a DVI to HDMI cable....

Edit2: Just to be clear, in my screenshot it shows 8.1gbps link speed...but also important to know that that's for each lane...since there are 4 lanes it's a total bandwidth of 32.4gbps or DP v1.4.  So be sure to multiply your link speed by the number of lanes to get your total bandwidth.

Edited August 5 by srt4fun

[Nycz]

Yeah with DP mine shows link speed but not with HDMI. My monitor says it's 2.1 but I have heard about some not being real 2.1 with not full speed support. 

[BigPapaDean]

So, where is the link so we wildcat guys can test ours?

[srt4fun]

38 minutes ago, BigPapaDean said:

So, where is the link so we wildcat guys can test ours?

 

Here's the download page  GPU-Z Graphics Card GPU Information Utility

Edited August 6 by srt4fun

[srt4fun]

2 hours ago, Nycz said:

Yeah with DP mine shows link speed but not with HDMI. My monitor says it's 2.1 but I have heard about some not being real 2.1 with not full speed support. 

It depends on 3 things. Your video card, your cable, and your monitor. All 3 must support DP v2.1. Your link speed will fall to the lowest supported rate of those 3 items.

 

From what I remember from previous posts you have a RTX5070, which does support DP/HDMI v2.1

Did you end up getting the Omen 27q or 27qs? or something else? Both of those only support up to DP v1.4/HDMI v2.0 (I have the Omen 27qs as my primary monitor)

 

Ahh, I just remembered....I knew I was forgetting something.... DSC (Display Stream Compression). Using this compression you could send higher resolution/refresh rates that aren't technically allowed via the raw bandwidth limits. I could see someone saying that that's not "real DP v2.1", which technically, it isn't. The RTX5070 definitely supports this, I do believe the 27qs supports it as well...As example, If you have a 1440p @240Hz monitor with HDR enabled, that requires ~26.5Gbps of bandwidth...with overhead it ends up a little over 32.4Gbps and you would enter into DSC mode (which may cause issues like flickering or stuttering). Without HDR would be about 19.5Gbps which would not enter into DSC mode.

 

Now putting the pieces together from issues in your recent posts regarding gameplay issues...If you have HDR enabled and using the full 240Hz on a 27q(s) (or other DP1.4 1440p 240Hz+ monitor) then that may be your issue...try turning off HDR...

 

And pardon my Autism....I keep writing and re-writing in my head and can never settle on the "perfect" answer, if there is such a thing, lmao!

Edited August 6 by srt4fun

[Nycz]

i have the dell alienware 2725dm that has dp 1.4 and hdmi 2.1. Not sure if its HDMI is true 2.1 or fake like some from what i see online are.

[KaptCrunch]

 will if have the correct cable, guessing your correct  for Hz180  not fit the spec of 2.1 hdmi. always read the spec sheet of anything  before you buy! 

Edited August 7 by KaptCrunch

[KaptCrunch]

you got what you pay for 

 

Alienware 27 inch QHD Gaming Monitor – AW2725DM | Dell Canada

Edited August 7 by KaptCrunch

[BUDMAN]

What is better for PC gaming, DisplayPort or HDMI?

 

 

Significant differences include that a Displayport generally supports higher resolutions and refresh rates, making it ideal for gaming, graphic design, and multimedia production. Displayport also supports daisy-chaining, where multiple monitors can be connected in a chain, using a single Displayport output.

[Nycz]

I am fine with it's 144hz on HDMI if it's true HDMI 2.1. that would still have a higher bandwidth than DP 1.4. 

[srt4fun]

1440p @180Hz uses 70% of available bandwidth for DP 1.4 (HDR increases to 86%). By going with HDMI you are losing out on 36Hz of refresh rate for no reason. What you read on the specs (for that monitor) is just HDMI marketing BS. Besides TMDS (which helps with long cable runs), there is really no tangible benefit over DP. They added/updated features in HDMI 2.1 that DP already supported for quite a while, lol (think in the realm of apple v android). Yes, more bandwidth...but when you have a 1440p monitor maxed to 144Hz, there is literally 3 times as much bandwidth available as you really need.... Then the question is, why the heck doesn't it support 180Hz over HDMI if there is all that bandwidth? The answer? HDMI sucks, lol!