Matrox Triple Head not recognized!!

[samsc]

yes - it normally works at 2400x600- 60HZ-

it doesnt seem to work at 1024x768 - 75Hz-

there didnt seem to be a way to do 75Hz ... with the TH2G resolutions available.
so its not that much use in europe-


also my performance testing has shown some restrictions with content sizes and overall graphics throughput.

30Hz needs more ooooomph, more frames per second need to be rendered.

Work here :

Display:
Resolution: 2400 x 600 @ 60 Hz
Depth: 32-bit Color
Core Image: Hardware Accelerated
Main Display: Yes
Mirror: Off
Online: Yes
Quartz Extreme: Supported
Rotation: Supported
Display:
Resolution: 2400 x 600 @ 60 Hz
Depth: 32-bit Color
Core Image: Hardware Accelerated
Mirror: Off
Online: Yes
Quartz Extreme: Supported
Rotation: Supported

Software:

System Software Overview:

System Version: Mac OS X 10.5.5 (9F33)
Kernel Version: Darwin 9.5.0
Boot Volume: Cat Os
Boot Mode: Normal
Computer Name: Catalyst01
User Name: Catalyst 01 (catalyst01)
Time since boot: 15 minutes

[emilianomorgia]

it doesnt seem to work at 1024x768 -

Never had that in this sys config

[samsc]

Never had that in this sys config

what do you mean?

[emilianomorgia]

what do you mean?

Some one said he can get 3x 1024x768 out of the Xt1900 , with my system I never had that working

the systems listed before it never run 6 x 1024x768

[SourceChild]

Richard brings up a good point. Don't follow my bad example of hacking the OS. Not even I get reliable results.

For TH2G and DH2G there is a fundamental stopping point.
Don't try to run more than 4 outputs with Catalyst.
Either use a single TH2G and a single second output or use 2 DH2G for 4 outputs.

[Mr_P]

For TH2G and DH2G there is a fundamental stopping point.
Don't try to run more than 4 outputs with Catalyst.
Either use a single TH2G and a single second output or use 2 DH2G for 4 outputs.

Yes theres a stopping point - for 1024x768 'Don't try to run more than 4 outputs with Catalyst' - true

Think we coud go round in circles here -

Theres no hard and fast rule. - except: test what you want to do before you need to do it!

I've had 6 x 800x600 running fine 1st go on an X1900XT in a 2007 MacPro running tiger. with 2 x TH2G

Also had 4 x 1024x768 from 2 x DH2G on the same spec...

TEST , try, test and make sure you can repeat it....

Simon

[samsc]

TEST , try, test and make sure you can repeat it....

Simon

using TH2G pushes towards or over what the graphics card can support.
Using Dual TH2G pushes even closer-

the restrictions are not from my software -

they are from the graphics card and whatever design decisions have been made to support certain resolutions.

These limits are not likely fixed but can change up or down with each revision of apple software or drivers, or change in graphics card.

Matrox also changed the resolutions they support between analogue and digital editions.

---

The point at which this stops working well enough is dependant on usage.

I have noticed different performance from graphics card with different content and image sizes, when using triple heads.
x2600 for example dont seem to like larger images or triple heads.

but there are no rules that can be relied upon.