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Displayport

DeadMan

DeadMan

DeadMan

Associate
Joined
18 Jun 2007
Posts
1,473
Location
Cambridge, UK
Having not used displayport before I thought I would give it a try..

I connected my ATI 5970 up to my dell 2408wfp and got nothing to start with until windows loaded and then its 640x480 only.

Is this normal operation for displayport?
 
The only difference being I am using a sapphire mini displayport adapter, the cable came with the dell monitor.
 
It appears that the displayport adapter is not native (e.g you cannot see any other resolution other than 640x480)

Anyone else here got a Dell 2408WFP and using displayport?
 
Arcane said:
I couldn't get it to work at all with 5850 crossfire, turned out to be the cable. Once I changed it however, it detected it straight away, no resolution problems .
Click to expand...

I'm thinking the same thing.. I have nothing else to verify the cable works correctly :(
 
CraigN said:
im using a 2408 with DP and works fine at 1920x1200

im on a 5870 tho with the dell supplied cable plugged direct into the gfx card
Click to expand...

Which version of 2408WFP is yours? this is a A00.

And I think yours is not using the mini displayport adapter?
 
kylew said:
It's not an active one that's needed for a 5970. Active adapters are for converting DisplayPort to DVI/HDMI.

A passive adapter will work with a mini DP to DP on the basis that they'll be pin compatible.

The apple one, I suspect doesn't quite follow the proper DP specification, I've heard of a lot of problems with them when being used with non-apple hardware.

Standard miniDP and DP are pin compatible, have the same amount of pins, they just have a different connector.

The equivalent would be a USB A representing a normal DP port, and a mini USB representing a miniDP port, same cable and standard, just a far smaller connector.
Click to expand...

Exactly, that is how it should work. I think the problem is my DP cable, so I am trying to find some hardware to test it.. more soon.
 
I'm gonna test a mini displayport enabled macbook with the monitor and cable/adapter tonight, hopefully it will show a faulty cable.
 
Interestingly the macbook pro wikipedia page has quite a bit of info regarding mini displayport: http://en.wikipedia.org/wiki/Mini_DisplayPort

"Although the Mini DisplayPort and regular DisplayPort signals are identical, the two connectors are physically different. To connect Mini DP to regular DP devices and vice versa, an adapter is needed."
 
Well just tested the macbook pro's mini DP connection and confirms that the cable and monitor are fine.

Its the HD5970 which appears to not output any resolution other than 640x480.

It clearly does not like my monitor for some reason.
 
Last edited:
Just tried a new 5870 with displayport and the same result monitor shows as supporting only 640x480 no other capable resolutions available.

Any ideas?
 
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