Which Video cards truly support 1080P on both ports?

[thestain]

I tested an Ati 1800GTO and while it worked at lower resolutions on all ports and with all kinds of inputs.. no 1080P and never could get it to display at 1920X1080 in any old operating system.. may have worked on one port over DVI in Windows.. card rma'd so can't test

Have bought and tried three GeForce 7600's.. the first did not work and the second and third I just bought.. the XFX Fatal1ty. Cool heatsink, hot running card.. needs air.. but..

Only the inside port closest to the motherboard works at all and only over DVI to DVI.. no vga, etc.. on these cards.. but.. good news is that inside port outputs 1080P to my 37 inch Westy.

My question is.. shouldn't the outside port work too? It does not work as it should.. am I missing something?

I tried testing both in my favorite test lab.. any old computer running with a recent copy of Puppy LInux.. loads in about a minute.. anyway.. swapping out the various video cards.. the first port is recognized.. through the first the Monitor is recognized.. etc.. and all works smoothly, but.. the through the second port, monitor not recognized.. and these cards just don't do 1080P, they don't do anything.. nada over the second port..

Anyone have any ideas on this? Does the second DVI-I away from motherboard need to be turned on or enabled??

There seems to be a lot of cards that Daamit and Nvidia have brought to market that claim 1080P support, but.. how many really support it over both dvi-i ports?

Mike

 

[Auric]

Well, there's nothing special about 1920x1080. If the driver did not provide that resolution by default it can simply be added. But that's all beside the point of a non-functional DVI. If it were higher resolution then a problem could arise if the second's transmitter was not capable of sufficient bandwidth or if HDCP was involved then likewise lacking that capability... but neither would seem to be the case.

When you say the second does not work do you mean with a single monitor or with another monitor simultaneously connected and working on the first-'cause I would not be surprised if the second is only useable if the first is already in use. But in any case it may indeed require enabling in software. What does the CP show?

Given all the viddy cards you have tried it seems much less likely they are all defective and that the cause is either software configuration or capability or a bad cable or incorrect useage or configuration of the second monitors inputs. So indeed, without verifying that your "favorite test lab" is actually reliable in the first place, you've prolly wasted a bunch of time messin' with the cards and ultimately foiled yourself

 

[krotchy]

Im surprised this issue is such a problem. Single link DVI can handle 1920x1200 typically, so 1920x1080 on 2 outputs should be fine.