Are Displayport 1.4 cables all equal in specs ?

[BunnyKraken]

Hi, I would just like to ask because I need to buy 3xDisplayport cables. Two for gaming and one for photo editing. Im puzzled are the 1.4 displayport cables equal in specifications and for use. I currently need for gaming 1440p 240Hz, 1080p 360Hz and one for 1440p 60Hz photo editing.  Also does the length matter for quality and stability for example between 1-2 or 3meter cable ? I currently need 2 or 3 meters.

So is there a difference for my use with the following im looking at ? Seems like every manufacturer has some difference in specs.

 

Akasa 8K DisplayPort 1.4 (2 meters)

HBR3, 32.4 Gbps, 8K@60Hz, 5K@60Hz, 4K@144Hz

InLine DisplayPort 1.4

7680 x 4320 (UHD-II / FUHD)  30 Hz, RGB / 4: 4: 4 and 60 Hz, RGB / 4: 2: 0 or DSC
3840 x 2160 (UHD) 120 Hz, RGB / 4: 4: 4, 8-bit, HDR OFF
3840 x 2160  (UHD) 120 Hz:, RGB / 4: 2: 2, 12-bit, HDR ON
3840 x 2160  (UHD) 60 Hz, RGB / 4: 4: 4, 12-bit, HDR ON
1920 x 1080 (FHD)
1280 x 720  (HD) 

Club 3D DisplayPort 1.4

 - HBR3, 32,4 Gbps
 -  Display Stream Compression (DSC) 1.2
 - Forward Error Correction
 -  32 Inline Audio Channel
 -  max. 8K @ 60Hz resolution

DeLock DisplayPort

• Connectors:
  1 x DisplayPort male >
  1 x DisplayPort male angled
• DisplayPort 1.4 specification
• Downwards compatible to DisplayPort 1.3, 1.2 and 1.1
• Pin 20 not connected
• Cable gauge: 28 AWG
• Cable diameter: ca. 7 mm
• Copper conductor
• Triple shielded cable
• Contacts gold-plated
• Transmission of audio and video signals
• Data transfer rate up to 32.4 Gb/s
• Resolution up to:
  Display with DSC support:
  7680 x 4320 i 60 Hz
  5120 x 2880 i 120 Hz
  3840 x 2160 i 240 Hz
  Display without DSC support:
  7680 x 4320 i 30 Hz
  5120 x 2880 i 60 Hz
  3840 x 2160 i 120 Hz
  (depending on the system and the connected hardware)
• Supports Display Stream Compression 1.2 (DSC)
• Supports HDR (High Dynamic Range)
• Supports HDCP 1.4 and 2.3
• Supports HBR3 (8.1 Gbps) data rate
• Up to 32 audio channels for speakers
• Up to 1536 kHz audio sampling rate
• Supports colour sampling in 4:4:4, 4:2:2 and 4:2:0 format
• Colour: black
• Length incl. connectors: ca. 2 m

Are the DSC and Forward error correction and 32 inline audio channels something that are in every 1.4 displayport cable, and are they better or worse for gaming, read somewhere that the DSC might cause some sort of lag while gaming ?

[GuiltySpark_]

No, DisplayPort cables are rated on their bandwidth carrying ability. HBR3 rated cables are the best you're going to reliably find today so look for that. 1.2, 1.4, etc are not cable ratings but DisplayPort spec versions. 

 

Cable ratings. 

 

https://en.wikipedia.org/wiki/DisplayPort#Cables_and_connectors 

[Senzelian]

18 minutes ago, BunnyKraken said:

Also does the length matter for quality and stability for example between 1-2 or 3meter cable ?

It does matter, but not at this length. Cable quality really starts to matter at or above 10 meters usually. But either way, I suggest you make sure that the cable is of good quality.

[BunnyKraken]

34 minutes ago, GuiltySpark_ said:

No, DisplayPort cables are rated on their bandwidth carrying ability. HBR3 rated cables are the best you're going to reliably find today so look for that. 1.2, 1.4, etc are not cable ratings but DisplayPort spec versions. 

 

Cable ratings. 

 

https://en.wikipedia.org/wiki/DisplayPort#Cables_and_connectors 

Thank you both for help. So if its HBR3 thats all I need?

What about Display Stream Compression (DSC) 1.2 or Forward Error Correction, HDCP 1.4 and 2.3 ?

[GuiltySpark_]

1 minute ago, BunnyKraken said:

Thank you both for help. So if its HBR3 thats all I need?

What about Display Stream Compression (DSC) 1.2 or Forward Error Correction, HDCP 1.4 and 2.3 ?

HBR3 is what you *need* if you're looking to do 4K120 and above, just for some context. 

 

All the features of DP are dependent on the devices on either end supporting them. 

[Glenwing]

Please refer to the pinned cable guide: https://linustechtips.com/topic/729232-guide-to-display-cables-adapters-v2/?output=DP

On 1/26/2017 at 10:38 PM, Glenwing said:

What DisplayPort cable do I need?

DisplayPort cables are not classified by a "version number". There are no "DP 1.2 cables" or "DP 1.4 cables". DisplayPort cables are rated by maximum transmission speed, such as "HBR2 cable" or "HBR3 cable".

To determine what DisplayPort cable rating you need, it is as simple as checking what transmission speed you need, and getting a cable with that rating. The transmission speed you need is based on your monitor's video format. The table above can be used for quick reference for standard formats. For example, if you want to run 2560 × 1440 @ 144 Hz, you can see in the table above that HBR speed is limited to 85 Hz at 2560 × 1440, but the next highest speed (HBR2) is enough for up to 165 Hz. Therefore, HBR2 is sufficient for that monitor, and you will need a DisplayPort cable rated for HBR2 speed or higher. That's all there is to it. For non-standard formats, or for different options such as 10 bpc color depth (HDR), you can use the calculator at the bottom of this guide.

 

On 1/26/2017 at 10:38 PM, Glenwing said:

What is the maximum length of a DisplayPort cable?

The DisplayPort Standard does not define any specific maximum length for a DisplayPort cable. Some people may claim that the standard specifies a maximum limit of 2 metres, or 3 metres, or 5 metres, etc.; These claims are incorrect.

DisplayPort compliance is based on whether the cable can pass a signal correctly or not, it isn't based on how the cable is physically constructed. The longer the cable is, the harder it is to pass the signal correctly, so there are practical limits on how long a cable can be made, but this is determined by manufacturing tolerances and may be different from vendor to vendor.

There is no specific cutoff point where the DisplayPort standard says "cables cannot be longer than X metres". If you as a manufacturer can manage to make a really long cable that can still pass the signal test criteria, then it's a valid DisplayPort cable. No one at the testing center is going to say "your cable manages to pass the signal perfectly fine, but aha, it's longer than 5 metres so it's automatically disqualified!" A DisplayPort cable is a cable that passes DisplayPort signals. There are no restrictions on how long it can be or what it's made out of or anything else, as long as the output signal is correct and within specification.

As practical matter, you can generally find DisplayPort cables up to 5 metres in length certified for HBR3 speed. Longer cables are available, but will generally be limited to HBR or sometimes HBR2 speed. For high-performance cables beyond 5 metres, you will likely need to look for an Active DisplayPort cable, which contains signal amplifiers or fiber optic transcievers.

Which DisplayPort cables support FreeSync, inline audio, HDR, DSC, etc.?

 

All DisplayPort features will work on any DisplayPort cable. There are no "special" DisplayPort cables required for inline audio, FreeSync, HDR, or anything else. Some people believe that you need a certain "version" of DP cable to use certain features. For example, people say that HDR was introduced in version 1.4, so you need a "DP 1.4 cable" to use it, or Adaptive-Sync (FreeSync/G-Sync) was added in version 1.2a, so you need a "DP 1.2a cable" or higher to use it. This is incorrect. The operation of these features has nothing to do with the cable, and support for these features is not affected by the cable. This is why cables are not classified by "version number", because cables don't determine what "version" of features are available. Cables only affect transmission speed, which is why they are classified by transmission speed ratings (HBR, HBR2, HBR3), not version numbers, feature support, or anything else.

 

[BunnyKraken]

20 minutes ago, Glenwing said:

Please refer to the pinned cable guide: https://linustechtips.com/topic/729232-guide-to-display-cables-adapters-v2/?output=DP

 

 

Thanks for the link and help to all. Will get the HBR3 cable. Just wanted to ask what are these then, are they something every 1.4 DP has. Only saw one brand the club 3d with these specs ?

-  Display Stream Compression (DSC) 1.2
 - Forward Error Correction

[Glenwing]

47 minutes ago, BunnyKraken said:

Thanks for the link and help to all. Will get the HBR3 cable. Just wanted to ask what are these then, are they something every 1.4 DP has. Only saw one brand the club 3d with these specs ?

-  Display Stream Compression (DSC) 1.2
 - Forward Error Correction

Not cable dependent features.

[BunnyKraken]

On 6/11/2023 at 2:40 AM, Glenwing said:

Not cable dependent features.

Thanks all for the help. Last question does it matter for image quality, or lag or anything if the cable is 2 meters or 3 meters ? Read on google searches to keep it as short as possible like 1.8meters. But I really need 2 to 3 meter cable at least.

[Andrewtst]

18 minutes ago, BunnyKraken said:

Thanks all for the help. Last question does it matter for image quality, or lag or anything if the cable is 2 meters or 3 meters ? Read on google searches to keep it as short as possible like 1.8meters. But I really need 2 to 3 meter cable at least.

3 meter normally will not have issue, if got issue you will seen screen keep flickering and appear garbage on screen.