27" iMac displayport Input

Is anyone talking about these guys yet?

http://www.engadget.com/2010/09/02/amd-makes-eyefinity-easier-with-line-of-budget-minded-active-dis/

I have no idea if this applies at all (particularly to non-ati/non-eyefinity cards), or if it's of no help whatsoever. Leaving it to you smarter folks to ponder

 

Nice post...Greatly appreciated!!!

 

Agreed! Yay for lower priced active adapters! Wonder if there's any tradeoff at all, or they're just getting better at making them "cheaper by the dozen."

 

Jesus christ about time!

 

Good news New AMD premium cards will come with minidisplay ports.

 

Seconded, Amazon's service is much better than Newegg's. I buy pretty much everything from them now.

 

Whats the cheapest card that will be able to handle 2x 27" cinemadisplay?

 

What do you want to do with it, isp?

 

Reading page 1-5 and the last couple of pages, everyone seems to be raving about how to get a PC to work on it....

My question is, was a method of Xbox or PS3 to iMac resolved? is there a cheaper way other than the Belkin $150 converter accessory? I have a mid-2010 iMac 27"....

Thanks guys...

 

very light gaming, mostly older stuff too...
mostly web/productivity apps/movies

 

Did anything change with the video card compatibility when the iMac got refreshed this summer? Considering getting one and it would be nice to not have to replace my 5770 to use it on my PC if I wanted to.

 

Not to thread jack but I'm selling my Gigabyte 4890s that I used to crossfire. It works flawlessly with the iMac. (I wish the same can be said about the 5970 I upgraded to)
http://hardforum.com/showthread.php?t=1548841

 

Can the brightness settings on an iMac 27" be changed on a PC?

I've read at Anandtech that with the new LED Cinema 27", brightness settings on the monitor require Boot Camp and cannot be modified on a PC. However, I saw posts here that the LED Cinema 24" brightness settings could be changed on a PC by using an Apple keyboard. Does this same trick work with the ACD27"?

 

When using a 27" iMac in target display mode, the thing to note is that the computer part of the iMac is on. You do not adjust brightness with the PC, you adjust brightness through the brightness controls on the keyboard that is plugged into the iMac.

That and command-F2 to switch between iMac display and target display mode are the only keystrokes you need to know when you are using the iMac to display from another source.

 

Is there a master list of cards that *do* work with the 27" iMac? I'm thinking about giving up on the 5870 and switching to another card.

 

These work:

1) Radeon Eyefinity cards all seem to work .... advanced switching technology
2) Radeon 5900s with mini displayport
3) Radeon 4000 series with displayport ( use a mini displayport to displayport cable)
4) Radeon 3000 series with displayport ( use a mini displayport to displayport cable)

SAPPHIRE HD 6870 1GB GDDR5 PCIE with Eyefinity looks like a goer for the money.
99% sure this will work.
http://www.sapphiretech.com/presentation/product/?psn=0001&pid=496

 

I ordered a SAPPHIRE 6850. Crossing my fingers that it will work with my Cinema Display and mini DP to DP adapter. My 5770 didn't work.

 

I have a 5770 too, please keep us inform, if the 6850 work.

 

Will do. The 6850 arrives tomorrow.

 

thanks
I wait for order my 6850 at 154€

 

I am happy to confirm that the Sapphire 6850 works with the 27" Apple Cinema Display with the StarTech mini-DP to DP adapter.

 

hum that's a good news.
I have just a cable, displayport to miniDp, I hope it works too.

but if your adapter works with your 6850 and not with your 5770, it's a sign

 

Doesn't the AMD 6850 comes with mini Displayports already? So why did you still use that startech adapter?

 

The 6850 has a standard DisplayPort output. (The 6870 has 2 mini-DP outputs.) I know the 6850 reference indicates 2 mini-DP outputs, but either the reference was changed, or no manufacturer is putting out a reference 6850. They all have one standard DP, one HDMI, and two DVI.

 

Now if only more Nvidia partners would use DisplayPort.

 

Now if only more Nvidia partners would use DisplayPort.

 

I received my HD 6850 yesterday, and I confirmed that it works fine with my iMac 27"

 

Do you take your iMac apart or what to do that?

 

What do you mean?

 

I can confirm that the ZOTAC ZT-40404-10P SYNERGY GeForce GTX 460 (Fermi) 768MB (http://www.newegg.com/Product/Product.aspx?Item=N82E16814500173) works just fine with the iMac DisplayPort including outputting sound. I'm very pleased so far.

 

lol, I think you misunderstand the entire point of this thread. martiallemanchot is using an HD6850 with his iMac 27" in Target Display mode.

 

exactly
and the sound works well through the displayport

 

I have some issues with the sound , my HDMI output is plug into my amplifier Yamaha and the iMac with the DP off course.
I didn't find the tips for switch hdmi to DP output. Make the displayport primary? not workd for me.
The last time I get sound I was just lucky


(sorry for my english, I'm french)

 

I apologize if I missed it (went back 3 pages or so), has anyone confirmed the 6870 works on the 27" iMac screen???

 

I really can't recommend using audio over HDMI then using DisplayPort for video. It can work but it is extremely difficult to get it to work reliably.

With ATI cards it is almost impossible. Everytime you power off your receiver you may very well spend 30 minutes screwing with it to get it working. With Nvidia cards it isn't as bad, but still far from stable.

After about 6 months of trying to use HDMI audio this way I eventually gave up and went back to an analog card. It just wasn't worth the hassle and stress.

 

the 6850 works so we can supposed the 6870 works too

 

Rather disappointed that Zotac didn't include a DisplayPort output on their GTX580.

 

Crap. Are there any 580s with DisplayPort or has nVidia abandoned it in favor of HDMI1.4?

 

As far as I know none have them. Not sure why Nvidia partners don't throw DisplayPort on the cards.

 

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.