27" iMac displayport Input

Stush said:
As an update to this post I made back in April, I no longer have the "cold start" fan spinup issue using my 5970 and the iMac 27" in target display mode. I can only assume this was fixed in one of the recent catalyst driver releases or maybe an OS X update as I haven't played with any new firmware for the video card nor changed the cable. Unfortunately I can't be sure exactly when this was fixed as I had made such a habit of popping the cable out when starting up the PC that I've only just noticed by chance that it now starts up fine with the cable connected.
Click to expand...

Did you ever update the firmware on your card? That was the solution for me.
 
Are there any other cheaper adapters that will work with the GTX 580 besides this one?
http://www.atlona.com/Atlona-Dual-Li...B-Powered.html

It is the only one I could find that supports 2560x1440, but it's $200, which is too much IMO.
I have yet to find any GTX 580 cards with Displayport inputs..

Are there any adapters that will work with the GTX 580 & iMac at 2560x1440 for a price cheaper than $200?

Thanks,

Extreme Speed
 
Extreme Speed said:
Are there any other cheaper adapters that will work with the GTX 580 besides this one?
http://www.atlona.com/Atlona-Dual-Li...B-Powered.html

It is the only one I could find that supports 2560x1440, but it's $200, which is too much IMO.
I have yet to find any GTX 580 cards with Displayport inputs..

Are there any adapters that will work with the GTX 580 & iMac at 2560x1440 for a price cheaper than $200?

Thanks,

Extreme Speed
Click to expand...

Wow. I didn't know a dual link DVI converter existed yet. Since Nvidia partners don't feel the need to add DisplayPort to their cards I may have to order me one of these.
 
I have a Shuttle, XPC Glamor SG33G5, computer (very small form-factor!) and I need a single thickness card that will be able to connect to my late 2009 iMac 27 inch computer so I can use the iMac as an external display for the Shuttle.
What is the fastest graphics card that is a single slot that will work? The double thickness cards would require case mods and I don't want to do that.
A while back I purchased a XFX, Radeon HD 5670, 1GB, PCI Express 2.1 card and I can't get that to work. Did they ever fix the drivers for that card or is it doomed never to work?
Will one of the new active adapters make it work or do I need to purchase a new card?

Much thanks in advance for all the info everyone is providing,
iwitzel@aol.com
 
iwitzel said:
I have a Shuttle, XPC Glamor SG33G5, computer (very small form-factor!) and I need a single thickness card that will be able to connect to my late 2009 iMac 27 inch computer so I can use the iMac as an external display for the Shuttle.
What is the fastest graphics card that is a single slot that will work? The double thickness cards would require case mods and I don't want to do that.
A while back I purchased a XFX, Radeon HD 5670, 1GB, PCI Express 2.1 card and I can't get that to work. Did they ever fix the drivers for that card or is it doomed never to work?
Will one of the new active adapters make it work or do I need to purchase a new card?

Much thanks in advance for all the info everyone is providing,
iwitzel@aol.com
Click to expand...

I don't think there are any single slot videocards that will work. No adapter will work, you would need one of the Althona converters mentioned above.
 
imac 27" core i7 rocks its probably the only Apple product that really provides good value for the money
 
Extreme Speed said:
Are there any other cheaper adapters that will work with the GTX 580 besides this one?
http://www.atlona.com/Atlona-Dual-Li...B-Powered.html

It is the only one I could find that supports 2560x1440, but it's $200, which is too much IMO.
I have yet to find any GTX 580 cards with Displayport inputs..

Are there any adapters that will work with the GTX 580 & iMac at 2560x1440 for a price cheaper than $200?

Thanks,

Extreme Speed
Click to expand...

Note that these converters sell for $140 on Amazon: http://www.amazon.com/Mini-Displayp...EXWO/ref=sr_1_1?ie=UTF8&qid=1291282282&sr=8-1

I actually got mine for about $120 back in August. Either way, don't pay full MSRP, you can definitely find it cheaper elsewhere.
 
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Buying a $150 dollar adapter is just ridiculous. I would rather buy a new GPU that supports the monitor natively.
 
Since nobody else seemed to have mentioned it in this thread, I just want to mention that I was able to make a custom EDID with 24 and 48hz settings for playback of 24P content. The 24hz setting was flickering like crazy but the 48hz setting was stable so I added that setting to a custom EDID and now I can select between 48hz, 59hz, and 60hz in the monitor properties.
 
Digging up an older thread, but is there still no success/cheap solution to hooking up a reference (standard display port) 5850 to one of these displays? Over at Macrumors a user posted this in late Oct. 2010:

Gents...I can confirm the ATI Radeon 5850 works. It has a DisplayPort, and I used a cable (DisplayPort to Mini DisplayPort) and it works fine.

For those having the blank screen issue...I recommend borrowing a monitor from someone, connecting one of the DVI inputs. By doing this, you can get to the control panel to configure the display.

After that you should be able to display just fine.

I do have a question though, some have said command F3 or command F2 will let you shift between iMac display and PC display...this part does not work for me. As long as the PC is on, it takes the display.

If there are any other thoughts on this part, by all means let me know your suggestions
Click to expand...
I don't really believe it, because I assume people would have tried the suggestion of configuring the display with another DVI connected LCD long ago, unless perhaps AMD have updated the drivers for the series to support Display Port to Mini Display Port connectors. Have to find out, though I may just buy a 6950 and unlock it to 6970 anyway..
 
anyone have any luck with a 5850 or 5870 (non eyefinity)?

I tried a 24" with miniport to display port adapter on my sapphire 5870 with no luck :(
 
annihilator3001 said:
anyone have any luck with a 5850 or 5870 (non eyefinity)?

I tried a 24" with miniport to display port adapter on my sapphire 5870 with no luck :(
Click to expand...

It won't work. The only ATI cards that will work are ones that were designed after the HD5970. So the HD5970 and the HD5870 Eyefinity cards are the only 5-series cards that will work. All 6-series cards will work though.
 
annihilator3001 said:
so a XFX 5770 with a native minidisplay port should work?
Click to expand...

Nope. The first generation of ATI 5-series cards didn't follow the DisplayPort port specifications properly so it will not work either. HD5970, HD5870 Eyefinity, HD6850, HD6870, HD6950 and HD6970 are the only ATI 5-series & 6-series cards that will work. Sapphire also make an HD4890 Vapor that had DisplayPort that should work as well.
 
There's a few non-reference GeForce cards with displayport that will work too (with a DP-MiniDP adaptor). I'm using the Zotac non-reference GTX 580 and it works fine with my iMac, except that the BIOS screens do not show up on displayport. (Of course, this might be because Nvidia only outputs BIOS to one screen, in my case DVI, whereas ATI cards output BIOS to multiple screens).
 
alamone said:
There's a few non-reference GeForce cards with displayport that will work too (with a DP-MiniDP adaptor). I'm using the Zotac non-reference GTX 580 and it works fine with my iMac, except that the BIOS screens do not show up on displayport. (Of course, this might be because Nvidia only outputs BIOS to one screen, in my case DVI, whereas ATI cards output BIOS to multiple screens).
Click to expand...

:eek: When the GTX580 was first released I looked to see if Zotac released one w/ DisplayPort and there was nothing on their website. Just looked again on their website and Newegg and I can't find any GTX580 that has DisplayPort.
 
Just thought I'd post this for those of you looking for an Nvidia card that supports the 27" iMac in Darget Display Mode.

I can confirm that EVGA's new GTX 570 HD card works beautifully in Target Display Mode. I am running the following card, just released on Newegg.com...
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130621

...with the following cable to connect to my 27" iMac (DisplayPort to Mini DisplayPort)
http://www.newegg.com/Product/Product.aspx?Item=N82E16812200602

EVGA finally jumped on the DisplayPort bandwagon and has released this card as well as a Superclocked version which I'm positive will work as well. These cards have a standard DisplayPort that must be adapted to a Mini DisplayPort (via adapter + cable or the above linked cable that does both) to be fully compatible. No, my BIOS does not display on the iMac when booting, but after pressing Command+F2 on my Mac keyboard when Windows is up, I find it to be bug free and intuitive. It will even remember your monitor configuration and automatically switch to the last setting used when switching back and forth between your Mac and PC (using Command+F2).

I'm glad we're starting to see more support rolling in from some respected manufacturers ;)

Hope this helps!
 
what about the slower nvidia cards, GTS 450 for example? can anyone confirm these work?
 
lowfat said:
Nope. The first generation of ATI 5-series cards didn't follow the DisplayPort port specifications properly so it will not work either. HD5970, HD5870 Eyefinity, HD6850, HD6870, HD6950 and HD6970 are the only ATI 5-series & 6-series cards that will work. Sapphire also make an HD4890 Vapor that had DisplayPort that should work as well.
Click to expand...

I confirm the Sapphire 4890 works, using it as we speak :)
 
Is there a list of 6970s confirmed to be working with the 27 iMac and ACD? After dealing with a PowerColor that wouldn't work with it and RMAing I don't want to waste any more money shipping other cards back.
 
lowfat said:
Nope. The first generation of ATI 5-series cards didn't follow the DisplayPort port specifications properly so it will not work either. HD5970, HD5870 Eyefinity, HD6850, HD6870, HD6950 and HD6970 are the only ATI 5-series & 6-series cards that will work. Sapphire also make an HD4890 Vapor that had DisplayPort that should work as well.
Click to expand...

Not quite correct. I have a 5450 at work that I just connected to my iMirror 27" (iMac that's never used) as a third monitor. It works just fine, even shows the Dell logo during startup. So it's possible that the lower end 5 series cards also work fine and it's just the 57 and 58 series cards that have an issue. Obviously that card is useless for any serious gaming, but for me it works fine for programming.
 
I always thought it needed a card with a minidisplayport, as strange as that sounds...
 
I can confirm that the sapphire 6950 dirt edition works with a display port to mini display port cable.

though i am getting the odd flickering on screen along with a pop through the speakers. and every so often i loose audio as windows is trying to use the optical port not the display port for audio. also noticed today there seems to be some lag in the audio.
 
I got this card to work with my iMac i7, 27 inch: *I’ve given up on getting my 5000 series to work.

XFX HD-677X-Z5F3
Radeon HD 6770 1GB 128-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card

It has 5 mini- DisplayPorts, but then you only need one to connect it to the iMac
$124 from here: NewEgg

http://www.newegg.com/Product/Product.aspx?Item=N82E16814150574

It works GREAT, audio works too but the volume seems low (I need to check it out)

Actually the best part is that it is working inside a Shuttle PC, which only has one PCIe slot that can hold a single width card. I had to put in an extra power supply to give it enough juice (so now my DVD drive is outside of the unit). I've been looking for a single slot card *a fast one* since I posted on this site months ago

Heat may be a problem in such a small box so I am going to cut a hole in the case where the fan is on the card and put a 40mm fan on the case where the exhaust is. Cool air in, hot air out.

Irwin
 
I got my 2010 iMac 27" a couple weeks ago :)

I went with a refurbed 2.8ghz quad core i5 2010 model specifically for the reason that the 2011 iMacs did away with DisplayPort input and can only use target display mode from a Thunderbolt source.

Although the connectors appear physically the same, there is apparently some sort of incompatibility that prevents them from having DisplayPort input backwards compatibility on Thunderbolt, even though it is backwards compatible with DisplayPort out. So confusing and...un-Apple-like. Well, maybe not un-Apple-like to so quickly throw out a beloved, major-selling-point feature in the name of adopting a new port. That's definitely Apple-like. But un-Apple-like in that it's damned confusing. No idea on why it's incompatible and why nobody has come up with a converter yet. Thunderbolt licensing must be one of those bags of hurt that Steve liked to complain about when answering "y u no bluray"

Since I plan to do various amazing things with my new "old" iMac, like hooking up my PC to it whenever I get around to upgrading my 5770, a 2011 iMac was out of the picture. For now, the mobility 5850 in the iMac seems to be almost as fast as the 5770 in my PC anyway, so I'm actually gaming on the iMac; if I could figure out how to overclock it with Afterburner I think it'd be every bit as fast.

Man, that display is gaw-jus. GAW-JUS, I tell you!
 
5850 mobility is based off of the hd5770 desktop gpu with lower clocks.if you are unlucky, 5850 mobility may have gddr3 instead of 5, too.
 
OK folks...here's my setup...

I have a HTPC running an ATI Radeon 6770 that's feeding a HDTV via DVI-HDMI cable. I now want to feed a 27" iMac (2009) via TDM that's 20-25 feet away from the HTPC. I ended up buying a 25' DP male-DPmale cable from Circuit Assembly http://www.circuitassembly.com/product_view.html?partno=H713007-25.0-P and a dongle to mDP male to DP female so I can plug the DP cable into the back of the iMac.

Results - not good!
As soon as I plug in the cable, the iMac seems to go into TDM, the screen is seen by Windows 7/ATI Catalyst, but then disappears after 1-2 seconds. Sometimes the iMac is just in a black screen for that duration, sometimes it's at a blue screen for that duration. Something is obviously working, but not quite enough...

I'm thinking that the 25' cable/distance is the problem. From what i've read, the 6770 is a working card for TDM. Anyone have any other ideas?

Thanks!
 
Slightly dumb question. I put together a new box with crossfired 6950s, with mini-DP out. I have a total of 4 mini-DPs to choose from to connect to my 2010 27" iMac, unfortunately it seems that none of them will show an image. Is this because its a new box and I have to install windows + drivers before it will output to the iMac, or am I doing something wrong?

It was previously working fine with a single card 4890 setup. (as in sig)
 
jgdiablo said:
OK folks...here's my setup...

I have a HTPC running an ATI Radeon 6770 that's feeding a HDTV via DVI-HDMI cable. I now want to feed a 27" iMac (2009) via TDM that's 20-25 feet away from the HTPC. I ended up buying a 25' DP male-DPmale cable from Circuit Assembly http://www.circuitassembly.com/product_view.html?partno=H713007-25.0-P and a dongle to mDP male to DP female so I can plug the DP cable into the back of the iMac.

Results - not good!
As soon as I plug in the cable, the iMac seems to go into TDM, the screen is seen by Windows 7/ATI Catalyst, but then disappears after 1-2 seconds. Sometimes the iMac is just in a black screen for that duration, sometimes it's at a blue screen for that duration. Something is obviously working, but not quite enough...

I'm thinking that the 25' cable/distance is the problem. From what i've read, the 6770 is a working card for TDM. Anyone have any other ideas?

Thanks!
Click to expand...

I have sapphir 6670 Vapor-X, and the same thing happends to me as well.
Should I change my video card? I can return it and replace it for a different one. Or there is a solution to this without changing the card?

Please respond ASAP, I can return my video card in the next 2 days or so. What graphic cards would work 100%?
 
Dunno, sorry :(

I have a 7970 hooked up to mine and have no issues - the iMac automatically switches to TDM and stays there until I shut my PC off or hit Cmd+F2 on the Apple keyboard

That's a bit pricier than a 6670 though.

Have you made sure your drivers are all up to date? (both on the PC and the Mac)

elleana said:
Slightly dumb question. I put together a new box with crossfired 6950s, with mini-DP out. I have a total of 4 mini-DPs to choose from to connect to my 2010 27" iMac, unfortunately it seems that none of them will show an image. Is this because its a new box and I have to install windows + drivers before it will output to the iMac, or am I doing something wrong?

It was previously working fine with a single card 4890 setup. (as in sig)
Click to expand...

You should be getting some signal out of it without any drivers whatsoever. BIOS screen should show up, etc. Have you got any other miniDP cables to try? (well, that probably wouldn't be the cause if that cable was working with your 4890)

Try it with a single card?
 
Does anyone have a 2011 iMac with the Thunderbolt ports receiving input from a 7970? Word on the street is the new Thunderbolt ports will only accept input from a thunderbolt device, so you can no longer drive them from a PC graphics card. I am curious if a 7970 is somehow accepted as an approved device.
 
The Thunderbolt iMacs will indeed only accept input from a Thunderbolt output. The 7970 does not have Thunderbolt output, unfortunately. They're DisplayPort. You'd need an active converter to go from DisplayPort output to Thunderbolt input, and as far as I can find, Intel has not released the chips that would be required to build those converters.
 
elleana said:
Slightly dumb question. I put together a new box with crossfired 6950s, with mini-DP out. I have a total of 4 mini-DPs to choose from to connect to my 2010 27" iMac, unfortunately it seems that none of them will show an image. Is this because its a new box and I have to install windows + drivers before it will output to the iMac, or am I doing something wrong?

It was previously working fine with a single card 4890 setup. (as in sig)
Click to expand...

Try it with one card, see if it works?

I always though the problems were in (some of the) 5xxx series of ATI cards.

It is also worth checking the cable, although in all the playing I've done with my 27" iMac, the cable was never the case. I always hoped it was.
 
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