Mac Pro :: 4870 Unable To Recognize Dual Monitors / Display Not Giving
Sep 3, 2010
I have an issue with my 4870 (Mac edition) that has been occurring since day one (when I purchased it last month), but it's not something that happens every single time.
I've run into a problem that the 4870 has trouble recognizing one or both monitors plugged in. If I shut off power to my displayport-connected main monitor, it'll throw the menu bar, all the desktop items, and application windows onto the second monitor (DVI-connected). This also happens when I shut off the second monitor (desktop items and app windows get shuffled to the main monitor).
The other issue is that on startup, it may just be slow to recognize one of them, and the above screen-swapping issues happen anyway, followed seconds later by the screen once again being recognized.
Has anybody else faced this issue? Is there something that can be done? This shouldn't be happening, right?
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Jun 16, 2010
I have an issue with my 4870 (Mac edition) that has been occurring since day one (when I purchased it last month), but it's not something that happens every single time.
I've run into a problem that the 4870 has trouble recognizing one or both monitors plugged in. If I shut off power to my displayport-connected main monitor, it'll throw the menu bar, all the desktop items, and application windows onto the second monitor (DVI-connected). This also happens when I shut off the second monitor (desktop items and app windows get shuffled to the main monitor).
The other issue is that on startup, it may just be slow to recognize one of them, and the above screen-swapping issues happen anyway, followed seconds later by the screen once again being recognized.
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Jun 16, 2009
I recently purchased a second 22" Dell 2209WA to go with my Mac Pro. They are both running from the ATI Radeon 4870 on my Mac Pro (2009 Quad) but the Expose performance seems to be really quite poor. Displaying all the windows is very juddery and not smooth at all. Is that what I should be expecting now? I wouldn't have on a �2000 Machine. Going into Spaces is fine, it's just Expose thats poor.
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Dec 2, 2008
I have bought a flashed 4870 for my 1st Gen Mac Pro and it works fine. But yesterday i wanted to plug a second 23" ACD in and woundered that its not working. Can i flash my card with another ROM so that i can use two monitors? In a german forum there are some people who has the same card and for them it works with 2 monitors ...
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Mar 23, 2009
Has anyone tried hooking up a two 30 ACD's to a 4870 on their MP.. just want to check if there are ANY issues with this setup.
[URL]
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Jan 10, 2009
After lots and lots of reading I went for flashed Sapphire 4870 512 off eBay for my Mac Pro 1,1 running SL 10.6.2, with two Viewsonic VP2030b. The guy selling the card had sold flashed cards before and had 100% feedback, said the card worked with dual monitors and supported SL. Got the card, installed it without a problem, but could not get it to work with both monitors.
Second monitor said no signal on both DVI channels. Checked all the wires, reinstalled, rebooted, no luck. Plugged both into my 7300GT, no issues at all. At one point, I got the left monitor to boot as the extended desktop, showing the dock but not showing the HDD or icons (which should be on the right screen), but the right screen still showed no signal and was black. Used the gather windows botton in the display preferences to see if adjusting settings helped, still nothing. Detect displays button was no help either. Is this a compatibility problem on my end or a flashing problem on his? Contacted him and he said he had no issues with his MP 1,1 and two 20" Apple displays.
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Sep 5, 2009
I've been trying to connect my MacBook to my Dell monitor. So, first I bought a mini DVI-VGA cord, but realized that I had a DVI not an AVI connection. In order to save time and money, I bought a DVI (female)-VGA (male) adapter. Everything fits in and connects perfectly. The problem is: when I turn on my Dell monitor nothing shows up. It says it's on safe mode and all I have to do is press a key on the keyboard or move my mouse. I do that, but it doesn't detect anything.
I know my laptop detects the monitor because when I go to display --> arrangement, I see there are 2 screens and display --> Gather Windows, a window for the Dell does pop up. From my understanding that once you plug in all the cords from your Mac to your monitor, it should work right away. So whats wrong with my dual screen? And how can I get it working?
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Aug 19, 2009
I have bought a flashed 4870 for my 1st Gen Mac Pro and it works fine. But yesterday i wanted to plug a second 23" ACD in and woundered that its not working.
Can i flash my card with another ROM so that i can use two monitors? In a german forum there are some people who has the same card and for them it works with 2 monitors.
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Feb 23, 2010
I went for flashed Sapphire 4870 512 off eBay for my Mac Pro 1,1 running SL 10.6.2, with two Viewsonic VP2030b. The guy selling the card had sold flashed cards before and had 100% feedback, said the card worked with dual monitors and supported SL. Got the card, installed it without a problem, but could not get it to work with both monitors. Second monitor said no signal on both DVI channels. Checked all the wires, reinstalled, rebooted, no luck. Plugged both into my 7300GT, no issues at all. At one point, I got the left monitor to boot as the extended desktop, showing the dock but not showing the HDD or icons (which should be on the right screen), but the right screen still showed no signal and was black. Used the gather windows botton in the display preferences to see if adjusting settings helped, still nothing. Detect displays button was no help either. Is this a compatibility problem on my end or a flashing problem on his? Contacted him and he said he had no issues with his MP 1,1 and two 20" Apple displays.
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Apr 9, 2010
I have a new issue with my Mac Pro (3,1 - 2008), it just popped up (and I don't think it was caused by 10.6.3, I remember this working correctly after it was installed I have two monitors connected via DVI to a flashed XFX 4870. The 4870 has never given me any trouble.In the Energy Saver settings, I usually set the machine to never sleep, and the displays to sleep after 5 minutes. This used to work great, never had any trouble with it, ever. Now, the displays don't go to sleep after 5 minutes, they just stay on with a screensaver.
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Apr 3, 2009
Can anyone suggest what should I do with Mac Mini 1,83 GHz Intel Core 2 Duo and my two new Dell monitors?I tried them using their standard VGI cables connected to a VGI port on a Mac Mini - both are dead. Not a single flicker.
My Mac bought from a trusted friend and acts as a practically new machine - but not with my monitors.
P.S. I went through several Mac-related forums and there's abundance of issues with "alien" monitors.
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Jul 30, 2009
I have a 40" HDTV that I have connected to my macbook pro with a DVI to HDMI cable. The picture falls off of the edges a bit.
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May 27, 2007
I'm trying to burn some data using DVD+R DL using my 17in MBP w/New Toast Titanium.. Unfortunately, its giving me an error and can not burn it. Anyone experienced this issue? Any solution to this problem??
I have the following hardware: MATSHITA DVD-R UJ-846
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Jun 6, 2009
I recently flashed my Sapphire 4870 1gb card and haven't been able to get dual monitor support working in Mac OS. Has anyone been able to get this working on a Sapphire 4870?
It works fine in Windows, not sure why it wont work in MacOS as I imagine the 10.5.7 drivers should be doing all the work.
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Aug 15, 2009
I've been searching now for 2 days and i've read so many different things it's ridiculous. All i need is for someone to confirm that YES it is possible to run dual 24" LED cinema displays from a single 4870.
One would hook up to the mini display port, and the other thru the DVI port.
Also, anybody have pics of their dual display setup?
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Feb 13, 2009
I recently purchased a miniDVI to VGA adaptor, and set up a dual monitor (37") to my iMac (24"). The problem is, the new monitor is only displaying at 1440 x 900.. i'd like it to be able to show 1920x1080; the actual resolution of the monitor. Any way of doing this? (the maximum resolution in the display preferences is 1440 x 900)
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Apr 29, 2009
Are there still flicker issues
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Aug 27, 2009
which card I need in order to have dual dual-link DVI?
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Oct 26, 2007
I'm curious if anyone has tried out Spaces with Dual Monitors yet?I'm not sure if it will matter or not, would kind of be cool to be able to specify which space goes to which monitor.....I have a New iMac with extra 20" LCD and will be upgrading to Leopard tonight, so I guess I'll know then...just wondering what to expect.
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Mar 4, 2008
So I was using my second monitor to run my G5 while transferring files to my new 3.2 octo, and then the past week I was using it to transfer my old PC files to my new PC. Now I finally just went to hook it up as my second monitor on my Mac Pro, and found out that I CAN'T FIT BOTH DVI CABLES TO THE PORTS!!!
They're too close together so I can fit one monitor into either port, but not both simultaneously. My monitors are the aluminum 23" ACD's w/ DVI.
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Apr 20, 2009
I was wondering if in anyway possible on a mac I can make my two monitors at the moment act as one virtual monitor? Know what I mean? So I want like one extra wide resolution which would cover both screens, not a separate resolution for each. Hope this is possible, much be in some way.
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May 18, 2009
Does anyone have dual 24" Apple Cinema Display monitors hooked up to their Mac Pro?
If so how did you hook it up, buy and adapter or?
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Jul 30, 2009
Is it possible to run two monitors independently via a hardware device with the macbook air? I would like to do it with a device that works well but doesn't cost a fortune.
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Sep 12, 2009
Does anyone know how to get hot corners to work on dual displays? I had a monitor plugged into my MBP 2.5ghz and after changing the relative location of the monitor in display settings, left of main screen to top of main screen, the lower left corner would allow me to access Expose for the applications in the current monitor, instead of exposing all application windows on both screens. This feature is very helpful though I cannot repeat it. Is there a certain orientation of the monitors that will allow each screen to have it's own hot corners functioning for that screen of was this just a fluke?
it would be nice to be working on one screen and watching a movie on the other without the movie expose ing when I only want to expose the applications/windows on the monitor who's corner I accessed.
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Nov 5, 2009
So as of now I have my 13" MacBook White connected to my Dell 20" S2009W, and I'd really like to add another S2009W, but I'm looking for the BEST possible solution to do this. I've looked at DualHead2Go, and Diamond.
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Mar 2, 2012
how to setup dual monitors. I have a 2009 Mac Pro with a ATI Radeon HD 4870. I dont see the options in the Display settings. Also I I get nothing on the second monitor?
Info:
Mac Pro, Mac OS X (10.7.3)
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Apr 24, 2012
I have an intel imac and would like to set up a second monitor to allow for more simultaneous side-by-side space when I do programming/editing. As I'm not interested in paying $1000+ for an apple monitor, I'd like to use a third party one. Thus far, I think I need a VGA to MiniDVI adapter [url], but then can I use ANY monitor that has a VGA port? And then will it be as simple as plugging in the second monitor and detecting it? Will the iMac screen remain unchanged? Will the computer just "know" when I scroll across one screen to the other
Info:
iMac, Mac OS X (10.6.8)
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Sep 10, 2010
Just picked up a minty Power Mac G4 Quick Silver and two ADC Studio Displays. I'd like to hookup both displays, but I only see one ADC port. What's my lease expensive dual ADC display option for this machine?
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Dec 21, 2010
I do not know much about this, so if i don't explain clearly, ask and i'll try again.
So basically, i have an iMac 21.5" Late 09 model here and a LOGIK TV next to it that has a channel for 'PC', i was wondering if it was possible to use them as 'dual monitors' for the iMac?
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May 15, 2008
I have the setup in my sig and I'm running one Dell 24" at 1920x1200. The thing is that I'm considering getting another monitor exactly the same so I can run dual monitors, but I've read that some people have had some lock-up issues while attempting this. My question is who wide spread is this before I go and drop $600 on another monitor?
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