does anybody know what the bios setting "Video" -> "Multi-Display" -> "Enable Multi-Display" effect? It just says "This option enables or disables Multi-Display. It should be enabled for Windows 7 32/64-bit only. This feature is not applicable to other operating systems."
By default its disabled.
I am using a HD 6450, not the onboard video.
Cant use onboard with x16 video get an ATi card with eyefinity and some mini display port adapters.
While Eyefinity is a fantastic tool, it does have a couple major drawbacks in a budget-oriented environment. The most significant restriction is mandatory DisplayPort use. In a triple-display setup, at least one monitor must use the card's DisplayPort output. If one of the displays doesn't have a DisplayPort input, the user must purchase an active DisplayPort to HDMI/DVI/VGA converter in order for it to work. The active part is key because it means a low-cost passive converter won't work. Unfortunately, most active DisplayPort-to-HDMI/DVI converters seem to be in the $100 range.
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I had this same question and here is the answer from a Dell support chat:
... this model does something different from our other systems in regards to onboard video and video cards.If you have that setting enabled, and a video card installed, and you're running Windows 7 with both drivers installed, you can use both the onboard video and the additional card
When combining a dual monitor card with the integrated video port offer the ability to run a three-monitor set up? I have tried to install two video cards to set up a three monitor set up and it failed.
All this means is that you can use the displayport and vga at the same time for 2 different monitors. I have a ATI 6670 and it completely disables the onboard intel video.
We are trying to run 3 monitors from an Optiplex 990. Did this solution work? I've tried installing 2 cards for the ability to run 3 monitors with no luck. I can run 2 monitors from a single card plugged into the primary PCI express slot, but every time I plug in the second card into the PCI express slot #2 all three monitors go blank.
If I can use the on board video along with a single card, we can live with it. What are the required settings?
I've also thought of purchasing a triple monitor capable card for my next step if the onboard and single card setup does not work.
Any help will be greatly appreciated.
Maybe you have the same problem I had. I have the Two DUAL HD 6350 cards and found there is a setting called CrossFire that is on by default. When I turned it off I was able to connect monitors to both cards.
Where is the switch setting?
It is in the Catalyst Control Center. There may be other ways to get there, but here is how I found it.
1. From the Catalyst Control Center Start Screen choose Performance - AMD CrossFire.
2. Un-check "Enable CrossFire."
A different approach would be.
Minimum System Requirements
CPU: Intel/AMD Quad Core 2.4GHz processor, RAM: 4 GB memory or higher
Product >> USB Display Adapter >> JUA230
JUA230 DVI DISPLAY ADAPTER
- Resolution up to 1920×1200
- Multiple- Displays using up to 4 adapters
* • Supports display resolution:1920 x 1200 @ 32bit
* • Plug-and-Play USB connectivity
* • Allows for up to 4 adapters in Windows
* • Allows for up to 2 adapters in Mac
* • Supports Display Modes: Primary, Extended, Mirror
* • Display Rotation: 0°, 90°, 180°, 270°
* • Aluminum enclosure that is non-toxic and recyclable
* • Easy driver install
* • Friendly software:
o - Identify Monitors
o - Multi-Display Control Panel
o - Shortcut to access Windows
o - Display settings dialog box
I have an Optiplex 390 with an integrated intel video card and an ATI HD 6450 PCI x16 card, and have enabled that BIOS setting. After a reboot, the computer installed drivers for the integrated Intel card. It complained that my ATI drivers were not functioning. With another reboot, all three lit up and work very well. I highly recommend three of the same monitors though so the color schemes and such look the same.
Did you ever get this working? I am having the same problem and I have disabled cross fire.
The Optiplex 990 works for me (on Linux) to run 3 monitors from one add-in PCIe video card plus the onboard Intel video.
I have Optiplex BIOS A05. I believe I enabled the video Multi-Display setting to get this working.
The add-in PCIe video card is not one from Dell, it is 3rd party nVidia Corporation GT218 [GeForce 210] (unsupported by Dell).
We have another Optiplex 990 with BIOS A13 that does not seem to have a "Multi-Display" choice or a video menu, we have not yet determined if that system will work. The user is actually trying to run two PCIe cards + the onboard Intel for 5 monitors total.
- Dan Stoner
You can have both the PciExpress card and the Onboard video working in tandem.
I just did. : My PC is Dell Optiplex 990, Mini tower, Intel i5-2400 3.10Ghz, 8Gb Ram. Windows 7 Professional 64 bits
Video Card ATI Radeon HD 5450 (4292MB)
1 - you probably have the ATI driver installed since it came with Dell base settings, but boot with PciExpress monitor(s) plugged in just to be sure.
2- reboot, go to turn on the bios multi monitor option
3- boot with only the onboard monitor: make sure you have the intel drivers installed
4- reboot with all your monitors connected.
I have 2x23" on the PciExpress card (via the 2xDVI dongle) and 1x17" on the mother board via the VGA connector.
It even seems like I can put something else on the Display port... but I didn't try.
Hope it works for you too.
I have a triple monitor set up working on a Optiplex 990 with an ATI card and the integrated DP in windows 8.1, but how did you get it to work in Linux? I am having trouble with it. I can only get the two video card monitors to show.
I started with the nvidia-settings GUI to create a base xorg file. Then I tweaked it and added the third monitor for Intel integrated graphics manually. Using Xinerama features.
I had to modify the configuration at least once due to changes in the binary nvidia drivers. The distro was probably Ubuntu 12.04. There have been a lot of changes to the graphics layers in newer Ubuntu so not sure if this config would still work.
Below is a pastebin of my xorg config. I copied and pasted from my email archive since I don't have access to the live machine anymore.
3 monitors total: two widescreens rotated into portrait mode, one normal monitor