I bought 2 shimian monitors and it seems that my old 6950 couldn't use them. I could only get one monitor working. I bought a 7950 and it still doesn't work. Windows doesn't see my second monitor when I go to resolutions, but catalyst control sees it. It's labeled as Digital, DFP, DVI,, disabled. Anyone have a clue what the bloody problem is? I've tried mini port adapter and hdmi to dvi adaptor. The monitor only has dvi-d ports btw.

ancientemblem

Canada34 Posts

September 17 2012 23:47 GMT

The man problem is that they require dual link dvi. You need a graphics card with 2 dual link dvi's or you need a 2nd card.

ddrddrddrddr

1344 Posts

September 18 2012 00:19 GMT

So there's no converter capable of getting these two monitors running?

a176

Canada6688 Posts

September 18 2012 00:32 GMT

have you tried detect display through CCC?

ddrddrddrddr

1344 Posts

September 18 2012 00:37 GMT

Yes, it tells me "This operation is not supported based on current display configuration. For more details, please see help" when I try to extend it. The CCC sees it, but the Screen Resolution window doesn't. And CCC won't extend regardless. Device manager sees it, and when I plug it in it comes with that dun dun sound from detecting new device.

MisterFred

United States2033 Posts

September 18 2012 00:41 GMT

No, you don't need a different video card, but unfortunately, things aren't terribly simple either. The main issue is that a resolution of 2560x1440 requires more bandwidth than a simple 1920x1080 resolution. Here's a picture of a random 7950:

The port circled in yellow is a single-link DVI port. It doesn't have enough bandwidth for you.
The port circled in green is an HDMI port. It doesn't have enough bandwidth for you.
The port circled in red is a dual-link DVI port. Presumably this is the one you're using to get your single monitor working.
The two ports circled in blue are mini-displayport ports. These ports have enough bandwidth
You might also have a full-sized display port connection. Like mini-displayport, a normal display port connection will have enough bandwidth.

So you have probably 3 ports capable of running Achevia Shimians on a 7950 (and I'm sure there's at least two on a 6950, for that matter). The problem is now adapters. HDMI to DVI adapters won't work... not enough bandwidth through HDMI in the first place. The tricky part is most displayport/mini-display-port to DVI adapters won't work either. Most of these adapters are only single-link DVI adapters, which don't have enough bandwidth.

What you need is an 'active' adapter specifically capable of dual-link DVI. Unfortunately, these are somewhat expensive. After a few searches, if you have a full-sized display port connection available, you can get the 2nd monitor up and running for about $50. Something like this should work:
http://www.amazon.com/Dell-BIZLINK-DisplayPort-Adapter-Powered/dp/B003XYBA72/ref=sr_1_1?s=electronics&ie=UTF8&qid=1347927992&sr=1-1&keywords=dell dual link adapter

The mini-displayport to dual-link DVI adapers are more expensive, coming to about $100. Something like this should work if you need to connect o a mini-displayport:
http://www.newegg.com/Product/Product.aspx?Item=9SIA0FU0BA4839

If you were planning on adding a third shimian for eyefinity, you'd need an active displayport adapter anyway to make that work. Unfortunately, I don't know of any cheaper solutions.

P.S. Note in the product descriptions of those adapters they specify the ability to run resolutions up to 2560x1600. Cheaper adapters might look like they'll work, but check product descriptions carefully. They probably specify they can only run resolutions up to 1920x1080 or 1920x1200, and will fail at the 2560x1440 of the Achevia Shimians.

ddrddrddrddr

1344 Posts

September 18 2012 01:23 GMT

T_T sounds about right for my luck....

FML, for a hundred bucks (more) I could just go buy a GTX670.

Thanks for the knowledge!

MisterFred

United States2033 Posts

September 18 2012 01:35 GMT

~~Well if it makes you feel any better, a 670 would have the same problem. They also come with only one dual-link DVI port.~~
(Whoops. See below.)

You might be able to go with the cheaper $45 adapter if your card came with a mini-DP to full-size DP adapter, by chaining adapters.

Though I don't know if there would be problems with that kind of thing. I'm not that knowledgeable.

P.S. If you can still return your 7950, you can probably use your old 6950, which likely has both a dual-link DVI & a display port connection. Though of course that also means dropping back down to less graphics oomph.

ddrddrddrddr

1344 Posts

September 18 2012 03:41 GMT

:o I was just about to buy a 670.
http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-670/specifications
This says One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPortStandard Display Connectors.
Shouldn't it work?

MisterFred

United States2033 Posts

September 18 2012 03:56 GMT

#10

Actually, yeah, it looks like you're right. Sorry, I didn't realize both the 670's DVI outlets were dual-link. That should work if you only want to connect 2 monitors.

ddrddrddrddr

1344 Posts

September 18 2012 04:29 GMT

#11

Sweet. Thank you for your assistance!

mathiasjensen

Denmark3 Posts

October 22 2013 19:49 GMT

#12

i know it is a little late :D - but i have just got the radeon club 3d 7950 and i have the same problem - i can use a hdmi monitor and a div to vga adapter on a vga monitor - will i be able to use a hdmi to vga adapter and it would work also? sry if you already answered this but im not that good at english reading :D

mathiasjensen

Denmark3 Posts

October 22 2013 20:12 GMT

#13

Aleteh

Denmark166 Posts

October 22 2013 20:14 GMT

#14

I have a 7950 and if i recall correctly, using the HDMI and DVI ports wont work as they are essentially using the same input (IE, only 1 device will work) so connect both monitors with the DVI ports or mini display ports.

Hokay

United States738 Posts

October 22 2013 21:22 GMT

#15

On October 23 2013 05:14 Aleteh wrote:
I have a 7950 and if i recall correctly, using the HDMI and DVI ports wont work as they are essentially using the same input (IE, only 1 device will work) so connect both monitors with the DVI ports or mini display ports.

Can anyone confirm if this is true? I only have 1 DP monitor and I want to use my HDTV as a 3rd monitor to watch streams which uses HDMI. I could never get it to work even after I used an HDMI to DP converter. I heard converters can be the cause of it not working so I'm about to buy a DP cable and actually use it for my DP monitor, while my second monitor uses DVI and my hdtv uses hdmi.

skyR

Canada13817 Posts

October 22 2013 21:28 GMT

#16

7950 has two TDMS transmitters. One for DVI and the second one is shared between the second DVI and HDMI. So DVI for the first and either DVI or HDMI for the secondary.

Hokay

United States738 Posts

October 22 2013 22:48 GMT

#17

My 7950 only has one DVI. It was a cheap 7950 for $129 after rebate.

Would I be able to use 3 displays with DVI, HDMI, DP? I couldn't get my current setup to work which was DVI (main monitor), HDMI (second monitor), DP (HDTV with HDMI to DP converter).

skyR

Canada13817 Posts

October 22 2013 22:55 GMT

#18

You need an active DP to HDMI adapter.

Hokay

United States738 Posts

October 22 2013 23:22 GMT

#19

Alright, thanks!

mathiasjensen

Denmark3 Posts

October 23 2013 05:19 GMT

#20

i can get it to work thougth - 1 dvi and 1 hdmi .... the dvi have a vga adapter so wouldnt i be able to get a hdmi to vga adapter instead of the 2nd dvi to vga adapter? :D

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