Question for dp cables

[JioFunny]

Hello,

 

I have asus rog swift pro PG248QP 540hz 1080p monitor, which comes with a 1.8m displayport 1.4 cable with this code on it E118077-Z, which is basically this cable 

https://www.lagerwerk.com/elektronik-mechanik/kabel/30453/e118077-z-displayport-kabel-l-1-8m?srsltid=AfmBOopJ3iJr7XDzgxec-_P7aPpZTna_XG5dCK-yYCEkbzNPoZC055uq

 

Anyway, I want to buy another shorter cable, just 1 meter in length to fit my setup because the monitor is right next to the pc.

And the problem is, from the simple thought of "ok.. buy a high quality 1m dp 1.4 or higher if you find and it's all good", I started digging deeper when I came across dp 2.1 since it is an option for me now as it is just 1m in length.. and price is slightly higher which I don't care about, and then I came across the biggest problem. Passive vs active dp cable.

 

Passive displayport cables are kind of rare these days to my understanding as far as I scrolled through the market basically, and the problem is most manufacturers won't clearly say if a specific model is passive or not in the description.

 

So with my poor mind I thought, why need a chip to enhance/clean/amplify the signal if we talk about a 2.1 displayport capable cable of 80gbits speed, vesa certified and just 1 meter in length.. 

I somehow stumbled across the only dp 2.1 passive cable I found.. which was also high quality thick with shielding etc.. and I bought it.

 

Did I do wrong? I really cannot think of a scenario I did wrong.. 

And let's just even go to the possibility I play a game that I will actually use 540hz.. shouldn't it, even if it doesn't have a chip, be better performing due to shorter length and 80gbit speed?

 

Thank you all very much in advance.

 

[Glenwing]

If the monitor only supports HBR3 speed, the it doesn't really matter.

[Stahlmann]

The monitor only has DP 1.4, so you won't get any benefit out of more expensive DP 2.0 cables. Get a decent DP 1.4 cable and call it a day.

 

Maybe watch this video to get an idea which ones are good:

 

 

TL;DW: Basically any reputable brand DP 1.4 cable is good.

They only had one cable fail that was included with a Samsung monitor.

 

[JioFunny]

2 hours ago, Stahlmann said:

The monitor only has DP 1.4, so you won't get any benefit out of more expensive DP 2.0 cables. Get a decent DP 1.4 cable and call it a day.

 

Maybe watch this video to get an idea which ones are good:

 

 

TL;DW: Basically any reputable brand DP 1.4 cable is good.

They only had one cable fail that was included with a Samsung monitor.

 

Thank you very much for the info. The thing is, I am not really getting an answer from you, as the question is basically if a passive but 2.1 dp cable will hinder the performance of my monitor in any way or any scenario.

 

I am just really hoping a passive but short 2.1 will not have any signal degradation to cause flickering or any problem. Not expecting a performance boost of course..

 

But. If there is a super measly performance boost, it could be lower latency. I won't be able to tell.. but just saying.. on paper.. probably.

 

Plus I have already ordered a 2.1 cable, but you should know good 1.4 cables are basically same price with the new 2.1 ones. At least in my country..

 

Again thank you for the response!!

 

 

1 hour ago, Urayde said:

You should be fine with a 1m passive DP 2.1 cable, especially if it's high-quality and certified. Since it's only 1 meter long, the signal degradation will be minimal, and you won't need an active cable. For gaming at 540Hz, a passive cable should work perfectly if it's rated for the speed and has good shielding. You made a good choice.

Ah.. heck.. so there is signal degradation even if it is just 1 meter? Wouldn't that cause problems maybe.. in fast camera transitions? (Just a foolish thought)

 

Thank you very much though.. with your comment at least I don't feel like I bought something that will certainly cause problems. I guess all I have to do is wait and test. At the end of the day, if it doesn't work, I will get a normal active one.

 

I am searching on google for the difference between 1.4 and 2.1 cables in their structure.. but I cannot find any answers. Why do 2.1 cables reach higher speeds? It is not the hq copper cables or the shielding.. those exist in 1.4 too.. so what is it?

 

I ask this because I was thinking.. like @Stahlmann said, IF this cable causes any problems and I have to buy a new one or return it, should I look for a classic active type 1.4, or better go for a 2.1 since it's the same price? Could there be any downside to a 2.1? Not really.. right?

[Stahlmann]

14 minutes ago, JioFunny said:

Thank you very much for the info. The thing is, I am not really getting an answer from you, as the question is basically if a passive but 2.1 dp cable will hinder the performance of my monitor in any way or any scenario.

 

I am just really hoping a passive but short 2.1 will not have any signal degradation to cause flickering or any problem. Not expecting a performance boost of course..

 

But. If there is a super measly performance boost, it could be lower latency. I won't be able to tell.. but just saying.. on paper.. probably.

 

Plus I have already ordered a 2.1 cable, but you should know good 1.4 cables are basically same price with the new 2.1 ones. At least in my country..

 

Again thank you for the response!!

The whole point is moot, because you won't see any benefits if using a DP 2.0 cable on a monitor and GPU that only have 1.4 ports. In that case the cable will just run at 1.4 speeds.

 

Passive or active doesn't matter in terms of latency.

 

If you already ordered a 2.0 cable, you don't need to return it. Just use it. I'm just saying, with your current hardware, there is no point in going with a 2.0 cable other than future proofing for future monitors and GPUs that support and use DP 2.0.

[Glenwing]

36 minutes ago, JioFunny said:

Thank you very much for the info. The thing is, I am not really getting an answer from you, as the question is basically if a passive but 2.1 dp cable will hinder the performance of my monitor in any way or any scenario.

 

I am just really hoping a passive but short 2.1 will not have any signal degradation to cause flickering or any problem. Not expecting a performance boost of course..

 

But. If there is a super measly performance boost, it could be lower latency. I won't be able to tell.. but just saying.. on paper.. probably.

 

Plus I have already ordered a 2.1 cable, but you should know good 1.4 cables are basically same price with the new 2.1 ones. At least in my country..

 

Again thank you for the response!!

 

 

Ah.. heck.. so there is signal degradation even if it is just 1 meter? Wouldn't that cause problems maybe.. in fast camera transitions? (Just a foolish thought)

 

Thank you very much though.. with your comment at least I don't feel like I bought something that will certainly cause problems. I guess all I have to do is wait and test. At the end of the day, if it doesn't work, I will get a normal active one.

 

I am searching on google for the difference between 1.4 and 2.1 cables in their structure.. but I cannot find any answers. Why do 2.1 cables reach higher speeds? It is not the hq copper cables or the shielding.. those exist in 1.4 too.. so what is it?

 

I ask this because I was thinking.. like @Stahlmann said, IF this cable causes any problems and I have to buy a new one or return it, should I look for a classic active type 1.4, or better go for a 2.1 since it's the same price? Could there be any downside to a 2.1? Not really.. right?

All high-frequency electrical signals will degrade over distance. Since modern systems use digital signaling, the degradation of the signal itself doesn't affect the result, it's just when the degradation reaches a certain point the receiver won't be able to read it anymore, and your signal will drop out (or in the case of DisplayPort, it will fall back to the next lower speed mode, and your refresh rate will be limited to 240 Hz or whatever).

 

All DisplayPort cables are fundamentally the same design. Higher speeds don't come from changes in wiring or structure, it's just a matter of control of the manufacturing. Small imperfections in the impedance control of the cable and twist rates of the wires will distort the waveform or skew the signal between lines or between pairs, which will cause signals to be unable to pass at higher frequencies or at longer distances. Tighter control of these (and various other) parameters will enable a cable to pass the signal within specification when another cable would degrade beyond recognizability and have to fall back to a lower speed. It's really just a matter of manufacturing improvements.

[JioFunny]

7 minutes ago, Glenwing said:

All high-frequency electrical signals will degrade over distance. Since modern systems use digital signaling, the degradation of the signal itself doesn't affect the result, it's just when the degradation reaches a certain point the receiver won't be able to read it anymore, and your signal will drop out (or in the case of DisplayPort, it will fall back to the next lower speed mode, and your refresh rate will be limited to 240 Hz or whatever).

 

All DisplayPort cables are fundamentally the same design. Higher speeds don't come from changes in wiring or structure, it's just a matter of control of the manufacturing. Small imperfections in the impedance control of the cable and twist rates of the wires will distort the waveform or skew the signal between lines or between pairs, which will cause signals to be unable to pass at higher frequencies or at longer distances. Tighter control of these (and various other) parameters will enable a cable to pass the signal within specification when another cable would degrade beyond recognizability and have to fall back to a lower speed. It's really just a matter of manufacturing improvements.

That was all I wanted to read.. thank you so much for the info!!