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http://www.dell.com/uk/business/p/optiplex-9010/pd says:

Configure your workspace the way you want it with support for up to three native monitors via DP/DP/VGA ports.

So I ordered one, and have connected three monitors, but I can only enable two at a time. It can be both of the ones connected by DisplayPort, or one of the ones connected by DisplayPort and the one connected by VGA. Does anyone know whether it really is possible to enable all three at once, and if so, how?

magicandre1981
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matthewk
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4 Answers4

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Is this using Radeon graphics? If so, I'm guessing your monitors are not native DisplayPort and instead you're using adapters. Most EyeFinity cards only have two TMDS clocks, so that means that any outputs beyond two have to be actual DisplayPort connections, or they won't work.

The workaround for this, if your monitors don't support DisplayPort natively, is to buy an active adapter instead of a passive one. (Sounds like you should only need one.)

EDIT: Since matthewk has confirmed that this card does not have discrete graphics, this is simply not possible with the Intel graphics chip in question. You'd have to have an OptiPlex 9010 with discrete graphics, and even then not necessarily all of those discrete graphics solutions would have three ports - there are plenty of such models according to the tech specs on the page linked in the question so the quote in question is technically true. (I'm leaving the answer intact because this would still be the case with shome other OptiPlexes.)

DOUBLEEDIT: To summarize comments discussion, apparently this Dell board is very weird, and works like this if and only if you're using two active adapters. I absolutely cannot explain this in any reasonable manner, totally at a loss, but there it is.

Shinrai
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I have Small form Optiplex 9010 with Radeon card (DIV & HDMI) and two display-ports on the motherboard.

Got two Dell U2312HM screens with display ports.

Start computer and go to Bios settings [F12] In Bios settings:

Select Displays and choose for Radeon Graphics card (not on auto) as primary

Now reboot And go in the Bios again [F12] Multiple display option is now available, so select it.

Now reboot again [F12] and enter the bios again. Select Intel as primary

So the trick is to reboot after every single bios setting, since the new options will be availaiable after the reboot.

Now I suddenly got 5 screens on in Windows Display settings, but you can only get maximum 0f 3 active displays (e.g. 2 x display port and 1x DVI from Radeon card) or (2 x display port and 1 vga on motherboard.)

I think that the Additional Radeon card is also necessay even if you use all motherboard connectors (2 x display port + 1 vga setup), but did not test it.

Paul Verschoor
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Firstly I'd recommend that you upgrade the driver software for the chipset.
Secondly, there was an issue with BIOS Rev: A00 and dual DP monitor setup. This might have affected 3 native monitors also.
A couple of days ago BIOS Rev A05 became available which addresses the dual DP setup. This might resolve 3 native setup as well.

Dave
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Anders B
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Ivy Bridge Intel Integrated Graphics - you can use three displays but two must be via DisplayPort (either two DisplayPort monitors or two active DisplayPort adaptors). See Most desktop Ivy Bridge systems won't support three displays:

Despite the fact that Intel has been banging its drums about support for up to three displays on the upcoming 7-series motherboards in combination with a shiny new Ivy Bridge based CPU, this isn't likely to be the case. The simple reason behind this is that very few, if any motherboards will sport a pair of DisplayPort connectors.

The issue to this specific problem is that Intel has moved away from TMDS support and towards the DisplayPort standard. However, Intel has only incorporated two PLLs and although this isn't an issue for DisplayPort connected monitors, it's a whole different matter when we're talking TMDS interfaces like DVI and HDMI, as well as of course good old analogue output. So if a motherboard maker was to make a board with three DisplayPort connectors – or one eDP interface with regards to notebooks – one of the three displays would be able to have a resolution of 2560x1600 and the other two would still be able to work at 1920x1200, due to the fact that they share one PLL.

Once we start throwing in other interfaces things get complicated, as TMDS and analogue interfaces don't like sharing PLLs. As such on a system where both the DVI and HDMI ports are used – or if the D-sub connector in lieu of one of the other two interface – no third display can be attached. The problem is that the DisplayPort interface is far from commonplace and as such most motherboard manufacturers have opted for more traditional interfaces.

Also see the Intel FAQ:

Q: What three independent display configurations are supported?

A In most cases, three independent displays are supported in the following configurations:

  • If two of the displays are DisplayPort* monitors
  • If one of the displays is an Intel® Wireless Display (Intel® WiDi)
  • If the built-in display is an Embedded DisplayPort1 (eDP)
bain
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