Jump to content

iMac 2008 Graphic Upgrade failed - Need help if possible

imac ati hd 2600 nvidia 9600

  • Please log in to reply
10 replies to this topic

#1
overshoot

overshoot

    InsanelyMac Geek

  • Members
  • PipPipPip
  • 120 posts
  • Gender:Male
  • Location:France
Hi Guys,

It has been a long time...
I bought a dead iMac 20 early 2008 with a defected Ati Radeon HD 2600 Pro.
I've seen on ifixit that some people were pretending this card can be replaced with a Nvidia 8800m GS or even with a MXM II graphic card specifications. So i decided to buy a Nvidia 9600M GT with same specs. Here it is : http://www.ebay.com/...984.m1497.l2649

But it did not worked for me. I replaced the card one time, boot the Mac, heard the dong but black screen (Target mode working). So i decided to put back the defected one to see if the Logic Board had something to do with it and i could see the screen showing up.
So, i guess, it could be a defected 9600M GT or an uncompatible card for the iMac...

Do you know if i can flash the graphic card so the iMac will accept it?
Any other idea?

If any Guru knows, that would be cool! ;-)

Thanks!

#2
3.14r2

3.14r2

    The Round One

  • Members
  • PipPipPipPipPipPipPipPip
  • 1,333 posts
  • Location:Molvania
There is a difference between Mac cards and PC cards. Cards for Mac have an extra stuff added to BIOS (the EFI part) so OS X could recognise the card from the very beginning of boot process. The card you've bought is from/for PC, hence does not have the EFI pat added. Therefore OS X can not recognize and use it.

However there are few options to make it work:
Mountain Lion with official Nvidia drivers may give you full support, but only then system done booting (read no boot screen with Apple logo)
ATYinit kext (check netkas site) this kext is used to enable unsupported PC cards in Mac Pros, but again only then system done booting (read no boot screen with Apple logo)

There could be other options as well, I guess.

#3
overshoot

overshoot

    InsanelyMac Geek

  • Members
  • PipPipPip
  • 120 posts
  • Gender:Male
  • Location:France
Hi 3.14r2,

That could be a good news. Will try this!
Thanks for answering man!

Have a good day!

Josh.

#4
overshoot

overshoot

    InsanelyMac Geek

  • Members
  • PipPipPip
  • 120 posts
  • Gender:Male
  • Location:France
Some news...

I've activated Apple Remote Desktop and i can connect to it.
The good news is that the system detects the Graphic Card correctly.

Here is the screenshot : Attached File  Capture d’écran 2013-06-07 20.18.31.png   83.95KB   23 downloads

I tried NVenabler but it looks like i get KP.

As i have the right informations in "system information", do i still need to look into Enabler like ATY init or NVenable or the problem is elsewhere?

Here is the bios of my card if someone knows what to do... http://www.techpower...024-081007.html

Also, i looked to this thread http://forum.netkas....pic,490.75.html and i'm a bit hopeless to solve my problem now...

Thanks.

#5
Rampage Dev

Rampage Dev

    InsanelyMac Deity

  • Local Moderators
  • 2,031 posts
  • Gender:Male
Try having Nvidia retail drivers installed and then test.

#6
3.14r2

3.14r2

    The Round One

  • Members
  • PipPipPipPipPipPipPipPip
  • 1,333 posts
  • Location:Molvania
Judging from the screenshot, the card is recognised, but doesn't work properly.

As far as far as I can understand from the screenshot, you have either Lion or Mountail Lion installed. Therefore you should definitely try what Rampage Dev suggests - install the official Nvidia OS X drivers. Since these work best with post Snow Leopard OS X versions. ATY init or NVenable are more for Snow Leopard Systems.

#7
overshoot

overshoot

    InsanelyMac Geek

  • Members
  • PipPipPip
  • 120 posts
  • Gender:Male
  • Location:France
Hi Guys,

Thanks for answering and for the good ideas!

Just need to figure out how to change my model from iMac to MacPro cause this drivers only want to install on MacPro systems or maybe i can use "Pacifist" to do the job.
Anyway i have moutain lion as System Os but upgraded to 10.8.4 now so i need to wait the new drivers from Nvidia.

Thanks.
Josh.

#8
3.14r2

3.14r2

    The Round One

  • Members
  • PipPipPipPipPipPipPipPip
  • 1,333 posts
  • Location:Molvania

Just need to figure out how to change my model from iMac to MacPro cause this drivers only want to install on MacPro systems or maybe i can use "Pacifist" to do the job

I guess modifying the installer to work on iMac would be easier.

#9
overshoot

overshoot

    InsanelyMac Geek

  • Members
  • PipPipPip
  • 120 posts
  • Gender:Male
  • Location:France

Hi Guys,

 

Finally i had time to try the NVidia Web drivers on my iMac8,1 with my NVidia 9600m GT but it did same, still a black screen.

 

Any other idea?

I'm about to buy a display port adapter to test if the video card send a signal. Maybe the video card and the screen doesn't know how to talk together ;-)

 

Attached File  Screen Shot 2013-06-18 at 08.48.20.png   91.65KB   8 downloads

 

Is there a way to be sure the drivers are loaded for my GPU?

 

Thanks.

Josh.



#10
overshoot

overshoot

    InsanelyMac Geek

  • Members
  • PipPipPip
  • 120 posts
  • Gender:Male
  • Location:France

Up Please! ;-)



#11
LouCioccio

LouCioccio

    InsanelyMac Protégé

  • Members
  • PipPip
  • 86 posts

from everymac.com

*This system can run the most recent version of OS X 10.9 "Mavericks," including booting in 64-bit mode. However, it does not support OpenCL nor does it support AirDrop, AirPlay Mirroring (which also requires a 2nd Gen or later Apple TV), or Power Nap.

 

Which OS are you running?  I have a 2006 MacPro running 10.9 with a Nvidia GT630 card. I used Tiamo boot_EFI but you can run Maverick without Tiamo boot. See if that will work? I am think the card you replaced may support OpenCL.

 

Lou Cioccio







0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users

© 2014 InsanelyMac  |   News  |   Forum  |   Downloads  |   OSx86 Wiki  |   Mac Netbook  |   PHP hosting by CatN  |   Designed by Ed Gain  |   Logo by irfan  |   Privacy Policy