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Graphics Card displayport problems
show user profile  Farks
Hi guys.

I don't know enough about graphics cards to solve this myself. I render with mental ray so this isn't a rendering based question.

I currently have a firepro v4800* which has 2x display port and 1x DVI. I have 2 screens, one of which only has HDMI connections. I've got an active adaptor which should allow my hdmi screen to plug in to the display port.... but it doesn't work. When I switch my pc on the screen connected through DVI shows good HD, the one connected through HDMI/Display Port shows up at a terrible screen resolution.

I've had some success unplugging the hdmi and then reconnecting it whilst the pc is running, but not always, and every time I turn the PC of it reverts back to being one good screen and one terrible.
*(my old graphics card came to the end of its life and I had this one installed in another computer which i've moved in to my main workstation)

Does anyone know how to solve something like this?


read 415 times
4/15/2015 12:48:29 PM (last edit: 4/15/2015 12:48:29 PM)
show user profile  Mr_Stabby
HDMI and DVI are natively compatible, DisplayPort and the others are not so the adapters are kind of hit and miss.

If I got this right, one of your screen has HDMI only and other has DVI? You could try a different adapter, active ones are more successful since they actually convert the signal (passive ones just hope that the video card can figure it out which they sometimes cant).

read 387 times
4/15/2015 7:10:16 PM (last edit: 4/15/2015 7:10:16 PM)
show user profile  Farks
Thanks Stabby,

Yeah that's the setup I've got. I'm currently using an active adaptor to go from DP to HDMI. The one I have at the moment is Techstar, have you got any recommendations as to what might be a better brand?
read 375 times
4/15/2015 11:08:15 PM (last edit: 4/15/2015 11:08:15 PM)
show user profile  Mr_Stabby
Techstar or Startech? The latter is pretty reputable from what I've gathered, they got certificates and everything.. the former, I'm guessing is some knock off brand.
(note: tick the adaptor checkbox and search)

those *should* work but no guarantees by me since I haven't actually used any of them.

read 371 times
4/16/2015 8:11:51 AM (last edit: 4/16/2015 8:13:07 AM)
show user profile  Farks
Thanks Stabby. Yes It's Startech that i'm using at the moment. I can't see why it wouldn't work, very frustrating!

Having looked at my adaptor .... It doesn't have the DisplayPort Logo, but is from the same brand and has a slightly different model number. Pretty cheeky of them to sell an almost identical product which doesn't act in the same way.

The screen I'm having problems with is the Samsung S27B750 - I'm not sure if this is likely to be causing a problem?
read 352 times
4/16/2015 2:00:45 PM (last edit: 4/16/2015 2:07:44 PM)
show user profile  Mr_Stabby
Not likely, the responsibility of arranging IO falls to the video card (unless there is an adapter in between).

read 349 times
4/16/2015 2:11:26 PM (last edit: 4/16/2015 2:11:26 PM)
show user profile  Farks
So I've spent the whole day on a webchat with someone from Startech and found out that it's probably a faulty adaptor. However I managed to fix the problem with some EDID emulation through the Catalyst Control Centre.

The guy from Startech was absolutely brilliant and they did offer to exchange the adaptor.

For now the problem is solved. Thanks for your input Stabby!
read 339 times
4/16/2015 7:20:57 PM (last edit: 4/16/2015 7:20:57 PM)
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