Spec or special cable?-

[ladybug]

Hi! Are those things in the screenshot hdr and so on part of the DP1.4 spec? Will any DP1.4 cable have them? Or is it extra features for this cable? 

[SignatureSigner]

HDR is the specification the TV supports, afaik cables are measured in bandwidth and type.

Aslong as your cable is in spec it should carry a HDR signal.

 

Edit:

refer to eigenvektors post 

 

[Eigenvektor]

24 minutes ago, stefanmz said:

Hi! Are those things in the screenshot hdr and so on part of the DP1.4 spec? Will any DP1.4 cable have them? Or is it extra features for this cable?

HDR requires a monitor that can do it (note that HDR 400 is … crap). Other than that it simply requires additional bandwidth, e.g. a cable that supports HBR (High BitRate) 1, 2, 3… Display Stream Compression (DSC) lowers the bandwidth requirement by compressing data before it is sent.

 

You might want to have a look here: https://linustechtips.com/topic/729232-guide-to-display-cables-adapters-v2/

 

For example, 8K (7680 × 4320) with a 10 bit color depth (10 bpc) at 60 Hz would require a bandwidth of 62.06 Gbps, so about twice the supported bandwidth that's shown here. When the GPU supports DSC with a 2x compression factor that would drop down to 31.03 Gbps, so should just be doable.

 

From what I can find the MacBook Pro M1 supports DP 1.4, but it does not support DSC. So be sure to check whether your particular device supports it. You'd also need to calculate the bandwidth requirement for whatever resolution, color depth and refresh rate you want to use.

[ladybug]

1 hour ago, Eigenvektor said:

HDR requires a monitor that can do it (note that HDR 400 is … crap). Other than that it simply requires additional bandwidth, e.g. a cable that supports HBR (High BitRate) 1, 2, 3… Display Stream Compression (DSC) lowers the bandwidth requirement by compressing data before it is sent.

 

You might want to have a look here: https://linustechtips.com/topic/729232-guide-to-display-cables-adapters-v2/

 

For example, 8K (7680 × 4320) with a 10 bit color depth (10 bpc) at 60 Hz would require a bandwidth of 62.06 Gbps, so about twice the supported bandwidth that's shown here. When the GPU supports DSC with a 2x compression factor that would drop down to 31.03 Gbps, so should just be doable.

 

From what I can find the MacBook Pro M1 supports DP 1.4, but it does not support DSC. So be sure to check whether your particular device supports it. You'd also need to calculate the bandwidth requirement for whatever resolution, color depth and refresh rate you want to use.

 

 

1 hour ago, SignatureSigner said:

HDR is the specification the TV supports, afaik cables are measured in bandwidth and type.

Aslong as your cable is in spec it should carry a HDR signal.

 

Edit:

refer to eigenvektors post 

 

I don't think my monitor has HDR it doesn't say anywhere.  If it is 250 nits peak brightness that means not HDR right? Also what bandwidth do I need for 1080p 165 hz? 

[Eigenvektor]

25 minutes ago, stefanmz said:

I don't think my monitor has HDR it doesn't say anywhere. If it is 250 nits peak brightness that means not HDR right?

Yes. The lowest official spec is HDR 400 (Though whether that's actually usable for HDR is debatable). You also normally want 10 bit color depth per pixel. So in other words you probably don't need to worry about HDR for your use case.

 

25 minutes ago, stefanmz said:

Also what bandwidth do I need for 1080p 165 hz? 

The forum page I linked to contains a handy bandwidth calculator for that. Assuming normal RGB with 8 bpc, you get a bandwidth requirement of 9.26 Gbps, so the cable should be more than capable.

[ladybug]

13 minutes ago, Eigenvektor said:

Yes. The lowest official spec is HDR 400 (Though whether that's actually usable for HDR is debatable). You also normally want 10 bit color depth per pixel. So in other words you probably don't need to worry about HDR for your use case.

 

The forum page I linked to contains a handy bandwidth calculator for that. Assuming normal RGB with 8 bpc, you get a bandwidth requirement of 9.26 Gbps, so the cable should be more than capable.

So if I want a cheaper cable which is USB 3.1 so 10Gbps do you think it will work? Or should I get the more expensive one but thunderbolt 4? So the one which I shared here.

[Eigenvektor]

1 minute ago, stefanmz said:

So if I want a cheaper cable which is USB 3.1 so 10Gbps do you think it will work? Or should I get the more expensive one but thunderbolt 4?

As I said in my other answer, cables aren't bound to a protocol (USB/TB), nor are they associated with a specific version, even if they are marketed as such. Instead DisplayPort cables come with a maximum supported bandwidth. The official specification includes the following speeds:

• High Bit Rate (HBR) – 10.8 Gbps
• High Bit Rate 2 (HBR2) – 17.28 Gbps
• High Bit Rate 3 (HBR3) – 25.92 Gbps
• Ultra High Bit Rate (UHBR) – 77.36 Gbps

See also: https://tripplite.eaton.com/products/displayport-cable-types

 

So in your case a cable that supports at least HBR should be enough. However, I would have a look at the price difference. If it isn't too big, it might make more sense to buy a slightly more expensive cable. In that case you can reuse the cable if you update your monitor in the future (e.g. 1440p) instead of having to buy yet another one.

[ladybug]

8 minutes ago, Eigenvektor said:

As I said in my other answer, cables aren't bound to a protocol (USB/TB), nor are they associated with a specific version, even if they are marketed as such. Instead DisplayPort cables come with a maximum supported bandwidth. The official specification includes the following speeds:

• High Bit Rate (HBR) – 10.8 Gbps
• High Bit Rate 2 (HBR2) – 17.28 Gbps
• High Bit Rate 3 (HBR3) – 25.92 Gbps
• Ultra High Bit Rate (UHBR) – 77.36 Gbps

See also: https://tripplite.eaton.com/products/displayport-cable-types

 

So in your case a cable that supports at least HBR should be enough. However, I would have a look at the price difference. If it isn't too big, it might make more sense to buy a slightly more expensive cable. In that case you can reuse the cable if you update your monitor in the future (e.g. 1440p) instead of having to buy yet another one.

Yeah I will get the better one which I shared here. Thanks for the useful information!