Mac mini 1.42 resolution problem

damado

macrumors 6502
Original poster
Aug 8, 2006
280
0
My main PC is waiting on a part replacement so I hooked up my mac mini to my cinema 30" but it will only display at 1280x800. The specs say this mac mini can go to 1920x1200. It was doing 1600x1200 on my dell 20 inch before.

Is there any way I can force it to that res or anything higher than 1280x800? It's the highest option listed in display prefs and it detected the right display.
 

Spanky Deluxe

macrumors 601
Mar 17, 2005
4,856
387
London, UK
Hmmm... that's odd although it does make sense in a way. 1280x800 is exactly half the resolution of the 30" ACD (I'm guessing its an Apple Cinema Display) and so each pixel is being enlarged to take up four. That way there's no funny scaling going on and there aren't any blurring effects or pixel anomalies.
Running 1280x800 on a 30" ACD looks better than running 1920x1200 on it.
 

gekko513

macrumors 603
Oct 16, 2003
6,302
1
The tech specs of the 30" display says it supports
2560 x 1600 pixels (optimum resolution)
2048 x 1280
1920 x 1200
1280 x 800
1024 x 640
so it's a bit strange that you don't get that option.
Edit: By "that option" I mean 1920x1200.
 

gekko513

macrumors 603
Oct 16, 2003
6,302
1
miniConvert said:
The Mac mini can't possibly support a 30" display... can it? It'd need dual-link DVI would it not? o_O
Not at full resolution, no, but apparently at least 1280x800 using single-link DVI.
 

iMeowbot

macrumors G3
Aug 30, 2003
8,636
0
damado said:
Is there any way I can force it to that res or anything higher than 1280x800? It's the highest option listed in display prefs and it detected the right display.
You may try dropping down to thousands of colors to see if that frees up enough VRAM to allow the higher resolution. I don't know if you'd want to run it like that, but if it works you'll at least know where the missing resolution option went.
 

damado

macrumors 6502
Original poster
Aug 8, 2006
280
0
Thanks much for all the replies I appreciate the help.

I tried dropping it down to thousands and even 256 but it still just shows 1280x800 as the max.

Oh well =/

I don't suppose there's a powerstrip type thing for osx eh?

I'll have my main PC back up and running in 5 days so it's not crucial. I just thought maybe there was something I was missing here as I'm still not as familar with macs as I am with WinPCs.
 

jdwl

macrumors newbie
Aug 10, 2006
19
0
'displayconfigx' allows you to configure custom resolutions - you can find it on versiontracker.
 

Anonymous Freak

macrumors 603
Dec 12, 2002
5,163
489
Cascadia
iMeowbot said:
You may try dropping down to thousands of colors to see if that frees up enough VRAM to allow the higher resolution. I don't know if you'd want to run it like that, but if it works you'll at least know where the missing resolution option went.
It has nothing to do with VRAM. It has to do with bandwidth. The DVI interface specifies that no matter what color depth you are at, it sends 32-bits of data per pixel. And the 30" display requires more bandwidth than DVI is capable of. Hence the need for a 'dual-link DVI' connection. (Two DVI connections in one connector.) This actually gives enough bandwidth for 3840x2400, more than enough for a 30" display.

So, in short, unless your hardware has a dual-link DVI port, there is *NO* way you will get a 30" display to run at its full resolution. The mini has a maximum resolution of 1920x1200. Period. To quote Apple's mini What's Inside page:
  • DVI video output to support digital resolutions up to 1920 by 1200 pixels; supports 20-inch Apple Cinema Display and 23-inch Apple Cinema HD Display; supports coherent digital displays up to 154MHz; supports noncoherent digital displays up to 135MHz
  • VGA video output (using included adapter) to support analog resolutions up to 1920 by 1080 pixels
 

iMeowbot

macrumors G3
Aug 30, 2003
8,636
0
ehurtley said:
It has nothing to do with VRAM. It has to do with bandwidth.
Learn to read. You missed that the original poster was not trying to get the full resolution of the 30" display, but the maximum resolution that the mini is supposed to support (1920x1200).