iM 4,1-14,4 Do i miss a step ?

[PADBOL2000]

Hello,
i have an imac 27" 2010 ( 11.3 ) , i bought a gpu AMD s7100x pre flashed with 3pipe heatsink
- first i remove old hdd an install a ssd with official high sierra : done ✅
- install sonoma with open core legacy patcher 2.4.1 : done ✅
- install new gpu card and try to boot : black screen no light , no fan sound ❌
- replace old gpu : imac boot, and works ✅.

Have I missed a step? Maybe a configuration setting? Do I need to return the GPU or try something else?

thanks

 

[Bigwaff]

What online guide did you follow?

 

[PADBOL2000]

What online guide did you follow?

The official OCLP at https://dortania.github.io/

 

[eyoungren]

My best guess here would be that when you did the root patches after installing Sonoma you had the old GPU installed. So when trying to boot with the new GPU card it's using the root patches for the old card.

What happens if you install the new GPU card and boot in Safe Mode then install root patches again (booting normally afterwards)?

 

[PADBOL2000]

Humm, with a black screen, do you think i can boot in safe mode?
i will try wednesday, i have to replace the new card instead of the old one)

 

[Dr Lou]

Be sure you've turned on the (correct) GOP injection in the 'Advanced' tab of OCLP settings

 

[PADBOL2000]

Be sure you've turned on the (correct) GOP injection in the 'Advanced' tab of OCLP settings

Absolutely not. Do you the right gop for my config ?

 

[Dr Lou]

I am certainly not the expert here - I've only a student at this point, as I plan to do the same thing (roughly) as you are doing, in upgrading your video card. After selecting your correct Target Model, go to settings in OCLP - under the Advanced tab is the Graphics section. My understanding is that we must 'turn on' injection of the correct GOP for our card(s).

Again, I have not done this yet myself. Am still struggling to correctly build an installer on USB!

Post #1 in this thread is your friend here.