Megalextoria
Retro computing and gaming, sci-fi books, tv and movies and other geeky stuff.

Home » Digital Archaeology » Computer Arcana » Apple » PowerPC Macs » Follow-up: ADC - AGP video card issues for MDD and G5
Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend 
Switch to threaded view of this topic Create a new topic Submit Reply
Follow-up: ADC - AGP video card issues for MDD and G5 [message #29327] Tue, 18 December 2012 13:35 Go to next message
frrob is currently offline  frrob
Messages: 16
Registered: November 2012
Karma: 0
Junior Member
Hello again:

You'll recall my travails last week with the Radeon 9800 Pro that I
couldn't get to work properly/reliably in my 1.25 gHz DP MDD. I finally
gave up on it, and reverted to the stock 9000.

But I purchased a 9600 XT on eBay, which I received yesterday. The machine
wouldn't power on with the card until I taped pins 3 & 11, which didn't
surprise me. But I taped the pins and the machine started right up, and the
card works fine, with a couple of caveats, which I'll get to in a moment.

However, much to my chagrin, I discovered that the 9600 XT, and presumably
other AGP/ADC video cards meant originally for the G5, does not have its
ADC connector in the same place as the 9000, or other G4 AGP/ADC cards. The
ADC connector for the 9600 is further back on the card than that of the
9000. Color me stupid, but, never having poked around inside a G5, I did
not know that the G5 and G4 had different physical locations for the ADC
connector. I figured ADC was ADC. D'oh!

So, though the card works, I've really gained nothing by getting the 9600.
I wanted an AGP/ADC card into which I could just plug my Apple 23 inch ADC
display. I can use my DVI - ADC adapter with the card, but what I wanted
was a straight ADC connection.

So, first question: my subsequent research indicates that the only AGP/ADC
card that offers Core Image hardware acceleration, and will physically work
with the ADC connector of the MDD, is the Radeon 9700, which, apparently,
had a version that was designed for the MDD. Is this correct, or are there
others I'm not aware of?

Furthermore, there is one issue with the 9600 when I use it with the
DVI-ADC adapter and my 23 inch cinema display. For some reason, and this
*only* happens with the DVI-ADC adapter and the cinema display, when I load
pages in Safari that have Flash content, Safari either hangs and becomes
unresponsive, or quits altogether. I then get a dialog that says "Safari
has quit unexpectedly. This may have been caused by the Flash 10.x
plug-in." This only happens with the 9600 - DVI - ADC - 23 inch cinema
combination. Any ideas what is going on here? I am guessing, but perhaps
for some reason the Core Image hardware acceleration of the 9600 (which the
9000 doesn't have) doesn't play well with Flash and ADC? I can't imagine
why, but there it is.

Finally, my second question, which may be moot, but: has anyone ever tried
to somehow adapt the ADC connector of one of these G5 ADC cards to the ADC
connector of an MDD? It seems to me that it could be done and could work.
The ADC connector only has two leads, which supply power for the display,
correct? It seems to me that you might be able to come up with some kind of
franken-connector or jumper that would let you go straight ADC. Anyone know
anything out there?

Thanks,

Rob J.

--
You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs.
The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml
To post to this group, send email to g3-5-list@googlegroups.com
For more options, visit this group at http://groups.google.com/group/g3-5-list

Re: Follow-up: ADC - AGP video card issues for MDD and G5 [message #29328 is a reply to message #29327] Tue, 18 December 2012 14:47 Go to previous message
Peter Devlin is currently offline  Peter Devlin
Messages: 13
Registered: December 2012
Karma: 0
Junior Member
On 18/12/2012 18:35, "frrob" <frrob@earthlink.net> wrote:

> Finally, my second question, which may be moot, but: has anyone ever tried to

> somehow adapt the ADC connector of one of these G5 ADC cards to the ADC

> connector of an MDD? It seems to me that it could be done and could work. The

> ADC connector only has two leads, which supply power for the display, correct?

> It seems to me that you might be able to come up with some kind of

> franken-connector or jumper that would let you go straight ADC. Anyone know

> anything out there?


I've seen a G5 AGP Pro 8x card converted to work in a non pro G4 4x slot
- not a pretty sight. But afaik the adc in the mdd has two connections in
the agp slot - thus the taping of pins 3 and 11 on 8x cards which I believe
in the mac slot supply power for the adc connection. In between the 4x agp
mdd and the 8x agp G5 the layout of the slot was converted to agp pro design
to keep adc - apple should have gone for dvi/vga at that point (had to
eventually) but they have always liked to have their proprietary video
connectors going way back...

Pete


--
You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs.
The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml
To post to this group, send email to g3-5-list@googlegroups.com
For more options, visit this group at http://groups.google.com/group/g3-5-list
  Switch to threaded view of this topic Create a new topic Submit Reply
Previous Topic: Jpeg thumbnails auto creation
Next Topic: Re: Digest for g3-5-list@googlegroups.com - 2 Messages in 1 Topic
Goto Forum:
  

-=] Back to Top [=-
[ Syndicate this forum (XML) ] [ RSS ] [ PDF ]

Current Time: Fri Mar 29 10:03:06 EDT 2024

Total time taken to generate the page: 0.07036 seconds