This is official from MATROX WEB SITE.
You can have 3840x1024 (3 screen 1280x1024) with 1 output active and
1 THTG (triplehead2go) only.
with 2 output active you can have maximum
double for 2400x600 (6 screen 800 x 600)
Using offset and blending you can attach 6 submixes how you want.
I already install Matrox original driver and work correctly.
I checked with and without matrox driver,no error detected
using MAC PRO 4 x 2.66 Ghz xeon cpu's with Ati Radeon X1900-512Mb
Tested on 5 different MAC PRO 4 x 2.66 Ghz cpu's with Ati Radeon X1900-512Mb using V4_m95UB_HD.


From MATROX Web Site.

Mac system compatibility

Support for Mac OS X v10.4 is limited to a specific list of Mac desktop and notebook models. Please refer to the list below to view the available compatibility on both the TripleHead2Go and DualHead2Go based on Mac system model.


Notebook Model DualHead2Go
Maximum resolution TripleHead2Go
Maximum resolution
MacBook 2048x768 (2x 1024x768)1 Not supported
MacBook Pro 2560x1024 (2x 1280x1024) 3840x1024 (3x 1280x1024)2
2400x600 (3x 800x600)3
1 An Apple™ Mini-DVI to VGA adapter is required to connect to the VGA input of the Graphics eXpansion Module
2 The notebook LCD must be closed to achieve this maximum resolution
3 Notebook LCD is active


Desktop Model DualHead2Go
Maximum resolution TripleHead2Go
Maximum resolution
Mac Pro 2560x1024 (2x 1280x1024) 3840x1024 (3x 1280x1024)1
Mac Pro G5 2560x1024 (2x 1280x1024) 3840x1024 (3x 1280x1024)1
Mac mini 2048x768 (2x 1024x768) Not supported
iMac (17") 2048x768(2x 1024x768)2 Not supported
iMac (20") 2560x1024(2x 1280x1024)2 3840x1024 (3x 1280x1024)
iMac (24") 2560x1024(2x1280x1024)2 3840x1024 (3x 1280x1024)
1 With ATI Radeon X1900, the 3840x1024 (3x1280x1024) resolution is available when TripleHead2Go is the only device connected to the graphics card. If another display is connected to one of the outputs of the graphics card in addition to the TripleHead2Go, the maximum resolution supported by TripleHead2Go will drop to 2400x600 (3x800x600).
2 An Apple™ Mini-DVI to VGA adapter is required to connect to the VGA input of the Graphics eXpansion Module.



Roberto Novelli HighEnd System dealer for Italy.