Well this is awkward!

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jaycob

jaycob

jaycob

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I think one of the Dual Link DVI ports on the 7970Ghz that I bought from OCUK some time ago has a fault on it as it's not powering my second monitor I just imported LOL

Both of the monitors work fine with one of the Dual Link DVI ports but the first one seems to be dead and not giving out a signal. Not sure what to do now :|

The problem is I didn't know this until I got my second monitor this year so I'm not sure how I'm able to RMA a 7970 that's been used for this long.

Could anyone give help me out with this at all?

This is my setup case anyone is wondering. The middle monitor is connected to a laptop in the draw under the desk and isn't connected to the main rig at all.
djNQFQN.png

Image is too big, 1280X is the max allowed width if not using spoiler tags.

gutted!
 
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Is it definitely a dual link DVI output? Have you tried both monitors in the faulty output, or just the new one?

Would be useful to know which 7970 you have as not all come with 2 DVI outputs, and the one that I did find (XFX) seems to not be dual-link - IIRC some cards with 2 DVI outputs only have dual-link on 1 of the outputs.
Also, are both the monitors using DVI themselves - or do you have a DVI->VGA adapter for one of them?

Assuming the output is faulty, then you better check the date on your receipt and see if the card is still within the manufacturers warranty period, some of them do have a 3 year warranty so you might be covered for an RMA.
 
Steviepunk said:
Is it definitely a dual link DVI output? Have you tried both monitors in the faulty output, or just the new one?

Would be useful to know which 7970 you have as not all come with 2 DVI outputs, and the one that I did find (XFX) seems to not be dual-link - IIRC some cards with 2 DVI outputs only have dual-link on 1 of the outputs.
Also, are both the monitors using DVI themselves - or do you have a DVI->VGA adapter for one of them?

Assuming the output is faulty, then you better check the date on your receipt and see if the card is still within the manufacturers warranty period, some of them do have a 3 year warranty so you might be covered for an RMA.
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Yeah both monitors work on one of the ports and both ports are Dual link DVI it's an ASUS 7970 DCUii

I called and was told they will send it back for an RMA but i'll have to wait a few weeks :|

The two monitors only power by Dual Link DVI

Kiyoshi said:
Oh dear LOL
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LOL indeed, This is the second 7970 I've had to RMA because the last one came DOA.
 
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One of those outputs is a single link DVI port not dual link according Asus (and assuming the card in your sig is the same one your referencing in your post).

What are the specs of you monitors? Single link DVI may not be able to drive your screens if the resolution is to high or requires to much bandwidth.

You might want to post also in the Graphics forum and ask for AMDMatt for advice. His product knowledge on AMD cards is second to none.
 
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Freddie1980 said:
One of those outputs is a single link DVI port not dual link according Asus (and assuming the card in your sig is the same one your referencing in your post).

What are the specs of you monitors? Single link DVI may not be able to drive your screens if the resolution is to high or requires to much bandwidth.

You might want to post also in the Graphics forum and ask for AMDMatt for advice. His product knowledge on AMD cards is second to none.
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Yes this is the card but it also has a switch that will enabled the forth display port and sets the second DVI output to Dual link mode, That's how I have it currently set right now, If I switch it to single link it'll power the backlights on one of my monitors but not the pixels as it's only in single link mode then.

The monitors are Crossover 2560 X 1080. Not sure if anyone has two of these monitors running off a single card. Problem is they only take Dual Link DVI too.

Doogles said:
Could get another HD 7970 for £100 used and crossfire, using the other cards ports...
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I don't think my PSU can power two 7970's and an 8350 only got a 750W PSU. Plus I'd ideally want to only run off a single GPU to save on crossfire headaches.
 
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Doogles said:
Could get another HD 7970 for £100 used and crossfire, using the other cards ports...
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jaycob said:
I don't think my PSU can power two 7970's and an 8350 only got a 750W PSU. Plus I'd ideally want to only run off a single GPU to save on crossfire headaches.
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It wouldn't work anyway.

You can only use the outputs from one card with Crossfire.

You could try running a second cheap to provide an output for the second monitor.

Edit:

It appears that the switch changes the dual link DVI to single link:

http://www.guru3d.com/articles-pages/asus-radeon-hd-7970-directcu-ii-review,6.html

Connectivity wise the output connectors will vary per brand -- ASUS went a little extreme though. You'll get two DVI connectors, one single and one dual-link and then four display port connectors. Combined you could pull of 6-way eyefinity monitor setup. To do that the dual-link DVI connector must be set at single link. There is a switch on the card that can select single link & dual link.
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Surveyor said:
It wouldn't work anyway.

You can only use the outputs from one card with Crossfire.

You could try running a second cheap to provide an output for the second monitor.
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It would because the broken GPU would go in second slot and the new used card in the first and use those outputs instead.
 
Doogles said:
That is a good point because no HD 7970's came with 2 dual link DVIs, my bad sorry about that, he could go with a R9 280x though?
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Is the 280X any different? It's a rebadged HD 7950.

You can get Display Port to dual link DVI adapters but they're pretty expensive.

If the OP has room a cheap graphics card with dual link DVI would suffice for running the second monitor.
 
Surveyor said:
Is the 280X any different? It's a rebadged HD 7950.

You can get Display Port to dual link DVI adapters but they're pretty expensive.

If the OP has room a cheap graphics card with dual link DVI would suffice for running the second monitor.
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Yeah it would be okay.

11221-01_R9_280X_TOXIC_3GBGDDR5_2miniDP_HDMI_2DVI_C02_635161495370302695_600_600.jpg
 
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