Connecting 4K monitors using Displayport/Mini DP cables

Tonester0011 · 7 May 2014 at 16:57

Don't even need a mDP > DP cable, just a normal mDP > DP adapter then a normal DP cable.

Kaapstad · 7 May 2014 at 20:46

spoffle said:
Stop acting like you've just confirmed it, you've had other people telling you it does already.

Unfortunately when you had the opportunity you were unable to help with sourcing the hardware needed (a cable rated at the correct speed to do the job).

spoffle · 7 May 2014 at 20:53

Kaapstad said:
Unfortunately when you had the opportunity you were unable to help with sourcing the hardware needed (a cable rated at the correct speed to do the job).

Did you not read the link you posted? There aren't any speed rated display port cables...

So how could I help you source something under requirements that don't exist?

Kaapstad · 7 May 2014 at 20:58

spoffle said:
Did you not read the link you posted? There aren't any speed rated display port cables...

So how could I help you source something under requirements that don't exist?

There are actually, unfortunately I can not post the link as it is a competitor.

Update

I have found a Mini DP to Displayport cable (Made by Accell) that supports the correct bandwidth and standard (1.2) to be compatible with a GTX 690.

So yes you can run 4K over a Mini DP cable.

If you do a web search for the above you will find it.

Kaapstad · 7 May 2014 at 21:08

spoffle said:
Did you not read the link you posted? There aren't any speed rated display port cables...

So how could I help you source something under requirements that don't exist?

Here is a list that you could have got from my OP.

http://www.displayport.org/products-database/?products_category%5b%5d=cables-connectors&products_manufacturer=

I am going to edit the OP to make this list more prominent as it could help people thinking about going 4K.

Will you be going 4K anytime soon ?

Kaapstad · 7 May 2014 at 21:17

spoffle said:
Did you not read the link you posted? There aren't any speed rated display port cables...

So how could I help you source something under requirements that don't exist?

Just updated to OP, I think you will find it quite helpful.

spoffle · 7 May 2014 at 21:20

They aren't actually rated, they are certified that they run within specification. While the difference may be subtle, I would say it's a very important one. So it's not a case of getting ones that are rated, it's getting ones that adhere to the spec properly.

Also, I would love to go 4K, however I am not really buying the TN panels, that and I'd want something bigger than 28", as I have 3x 27" 2560 monitors at the moment.

Kaapstad · 7 May 2014 at 21:29

spoffle said:
They aren't actually rated, they are certified that they run within specification. While the difference may be subtle, I would say it's a very important one. So it's not a case of getting ones that are rated, it's getting ones that adhere to the spec properly.

Also, I would love to go 4K, however I am not really buying the TN panels, that and I'd want something bigger than 28", as I have 3x 27" 2560 monitors at the moment.

Products Database

All products in the database bearing the DisplayPort logo have been tested against strict guidelines to ensure they will work as advertised. Only products that undergo testing are permitted to carry the DP logo.

I would say this means rated, certified and quite a few more definitions you can think of.

spoffle · 7 May 2014 at 23:22

Maybe so, however it's very distinctly certified, not rated.

triss · 7 May 2014 at 23:35

Certified/rated lets not spilt straws guys

Thanks kaap for digging about I'm sure theres a few looking at 4k who wernt sure what cable was best/did what

Gregster · 8 May 2014 at 13:04

Well done Kaap and I would love to have seen this info if I was only able to use mDP. The info before was a little vague and nothing was definite that I could find.

spoffle · 8 May 2014 at 19:14

triss said:
Certified/rated lets not spilt straws guys
Thanks kaap for digging about I'm sure theres a few looking at 4k who wernt sure what cable was best/did what

It's still important, in that these cables are certified to meet the DP spec, and there isn't any noted differences between DP1.0 and DP1.2 cables, if a cable is rated for DP1.0 it'll work with DP1.2, which demonstrates that they're not actually rated for speed, as DP1.2 has twice the bandwidth of DP1.0.

Kaapstad · 8 May 2014 at 21:24

spoffle said:
It's still important, in that these cables are certified to meet the DP spec, and there isn't any noted differences between DP1.0 and DP1.2 cables, if a cable is rated for DP1.0 it'll work with DP1.2, which demonstrates that they're not actually rated for speed, as DP1.2 has twice the bandwidth of DP1.0.

You really need to read the OP, you will find it quite helpfull if you do.

spoffle · 8 May 2014 at 22:12

Kaapstad said:
You really need to read the OP, you will find it quite helpfull if you do.

I have done, you seem to be the one that's confused though. Cables certified to work with DP 1.0 will work with DP 1.2 also, which means they aren't speed rated, they are certified to be of the correct specification.

It says it all in the text you have quoted;

DisplayPort makes display cable selection pretty easy. A standard DisplayPort cable is designed to work with any DisplayPort Source device, such as a PC or laptop, and any DisplayPort monitor. This means that a standard DisplayPort cable will work with the very first DisplayPort systems and displays introduced around five years ago, and they will continue to work with the newest and future systems and displays that support multi-stream and display resolutions up to 4K (Ultra HD) at 60Hz. You can also use a standard DisplayPort cable between a PC and a multi-stream hub, or between daisy-chainable multi-stream monitors. You don’t need worry about getting a special cable to support certain DisplayPort capabilities.

However, we should note that there is one rare exception to this rule; there are a few Reduced Bit Rate (RBR) cables on the market that will support only up to 1080p, but these are generally restricted to projector installation applications. Unless the cable is identified as RBR, it is a standard DisplayPort cable and will support all DisplayPort configurations.

Despite what you may read, there is no such thing as a DisplayPort 1.1 cable and DisplayPort 1.2 cable. A standard DisplayPort cable, including the so-call DisplayPort 1.1 cables, will work for any DisplayPort configuration including the new capabilities enabled by DisplayPort 1.2, including 4K and multi-stream capabilities. All standard DisplayPort cables support RBR, HBR (High Bit Rate), and HBR2 (High Bit Rate 2), which can support 4K at 60Hz, or up to four 1080p displays using multi-stream.

This demonstrates that there isn't any such thing as speed rated cables. Sure, there are the reduced bit rate ones, but that isn't a rating either, it's a non-standard (and standard is what we're talking about) cable for specific uses, that a consumer typically won't be getting hold of.

Kaapstad · 9 May 2014 at 03:56

spoffle said:
I have done, you seem to be the one that's confused though. Cables certified to work with DP 1.0 will work with DP 1.2 also, which means they aren't speed rated, they are certified to be of the correct specification.

It says it all in the text you have quoted;

This demonstrates that there isn't any such thing as speed rated cables. Sure, there are the reduced bit rate ones, but that isn't a rating either, it's a non-standard (and standard is what we're talking about) cable for specific uses, that a consumer typically won't be getting hold of.

You really are embarrassing yourself arguing about points of order.

spoffle · 9 May 2014 at 04:00

No, no I'm not, you are just too stubborn to accept that you've been wrong, again, like you were in the other thread when you had the guy telling you he's using a miniDP cable to connect his 4K TV and is running it at 60Hz. You decided instead to be condescending and suggest that maybe his TV was running at 30Hz despite what he told you.

Kaapstad · 9 May 2014 at 08:15

spoffle said:
No, no I'm not, you are just too stubborn to accept that you've been wrong, again, like you were in the other thread when you had the guy telling you he's using a miniDP cable to connect his 4K TV and is running it at 60Hz. You decided instead to be condescending and suggest that maybe his TV was running at 30Hz despite what he told you.

You really seem to have difficulty reading what I posted in the OP.

I find it most useful keeping an open mind when debating, I am also prepared to change my views on a subject as new information comes to light. This is the whole reason for this thread, I felt the need to state in the OP what my view point is now. I did not wish to have it buried in another post.

Don't you agree that you should keep an open mind.

Perhaps you could even contribute something constructive to the thread, if you are prepared to do this I am sure we will all look forward to it.

ubersonic · 9 May 2014 at 08:45

So basically after three days the TLDR is that 4K/60Hz works fine over MDP, you just may have issues if using cheapo cables that don't meet the spec. So essentially what we've been telling you for the past 3 days ^^

Final8y · 9 May 2014 at 08:51

The limitations are nearly always with the interface and not the cable except where corners have been cut and is not fully wired.
Cables are designed around limitations of the interface and not the other way around, so mini versions will make no difference as long as it is using the same specification interface protocol of the bigger brother.

Sata, Sata 2 and 3, the same cable, limitations are versions of the interface.

HDMI versions all the same cable, limitations are versions of the interface, even where 2 cables are required, later versions of the interface will require 1 of the same cable to do the same job as 2 on the earlier interface.

DP versions all the same cable, limitations are versions of the interface.

There is nothing to stop them all using different cables per version and break backwards compatibility and make you believe the cable was the limitation and gain cable upgrade sales.

Kaapstad · 9 May 2014 at 09:23

ubersonic said:
So basically after three days the TLDR is that 4K/60Hz works fine over MDP, you just may have issues if using cheapo cables that don't meet the spec. So essentially what we've been telling you for the past 3 days ^^

I think we are all better informed now so it has been a worthwhile exercise.