Three monitors on Mountain Lion 10.8.2

[cpizzato]

Hi All,

I would really appreciate some guidance, I have not been able to crack this one after many hours. I have the following hardware running 10.8.2:
- Gigabyte GA-Z77X-UD5H (with Intel HD4000)
- NVIDIA GT640 2GB Video Card (N640OC-2GI)

I am try to get three monitors to work however am coming across the following issues:
- With Multibeast (PciRoot ID Fix) I can get the GT640 to work but only with 2x monitors (using 1x of the DVI ports and the HDMI port). I can't seem to get this card to drive 3 monitors under OSX.
- Cannot get the Intel HD4000 on the Motherboard to display anything unless I manually inject something like the below /Extra/org.chameleon.Boot.plist but have tried many combinations and it seems regardless of what I put in here and how much RAM I set for the video card in BIOS that the screen is distorted and garbled

<key>device-properties</key>
<string>8e0000000100000001000000820000000200000002010c00d041030a010000000101060000010101060000007fff0400100000006d006f00640065006c0000001a000000496e74656c20484420477261706869637320343030302c0000004100410050004c002c00690067002d0070006c006100740066006f0072006d002d006900640000000800000005006201</string>

- I only use limited options in MultiBeast related to the video settings (Boot Options -> PciRoot ID Fix) and have GraphicsEnabler = yes.

What am I doing wrong - I would really appreciate any help...

Regards
Charles

 

[Going Bald]

If the 640 has a Kepler GPU then you should be able to run 4 displays natively in 10.8.2 with GE=NO. There should be no need for any graphics strings or injections as the Kepler GPUs are fully supported in OS X 10.8.2.

If you have a Fermi GPU, then 2 displays are all you get.

 

[cpizzato]

Thanks for the reply, it's definitely a Keppler GPU but can only get 2 displays working with GE=No. Any other ideas?

 

[Going Bald]

Thanks for the reply, it's definitely a Keppler GPU but can only get 2 displays working with GE=No. Any other ideas?

Did you try installing the latest kext files from nVidia and the CUDA files?

 

[cpizzato]

Hi mate,

Do you mean http://www.nvidia.com/object/cuda-mac-driver.html ?

It doesn't list the GT640 in the list of supported products - but guessing that is because they were never made to be used with that card but wouldn't that cause problems?

Also couldn't find an NVIDIA driver on the site for this reason also.

Any hints?

Charles

 

[ultrazone]

If the 640 has a Kepler GPU then you should be able to run 4 displays natively in 10.8.2 with GE=NO. There should be no need for any graphics strings or injections as the Kepler GPUs are fully supported in OS X 10.8.2.

If you have a Fermi GPU, then 2 displays are all you get.

Going Bald, you told me the GT640 is a Fermi card... Are there two versions ?

In this thread there's some more info: http://www.tonymacx86.com/buying-advice/86278-graphics-cards-can-use-3-screens-osx.html

By the way, I checked that my Gigabyte GT640 can't feed three displays.

Hope it helps !

 

[Going Bald]

Going Bald, you told me the GT640 is a Fermi card... Are there two versions ?

In this thread there's some more info: http://www.tonymacx86.com/buying-advice/86278-graphics-cards-can-use-3-screens-osx.html

By the way, I checked that my Gigabyte GT640 can't feed three displays.

Hope it helps !

It was something I read on one of the review sites that the early 6x cards with DDR2 memory were actually Fermi 5xx cards rebranded. Don't have notes and such here, so can't link the review.

You also need to look at the manufacturers site and see how many displays the card will drive at the same time.

 

[cpizzato]

Mate you were spot on about the drivers - I found and installed the latest nVidia and CUDA drivers and BAM 3 monitors straight away.

Thanks so much!!

Charles