Hello,
I want to upgrade my iMac27 (12,2) with
a new Grafikcard! NVIDIA GTX860M and
a new CPU! i7-3770 (Ivy Bridge), and replace
the old GPU! With AMD Radeon HD6970M
and the old CPU! i5-2400 (Sandy Bridge),
from iMac27 (12,2) to iMac27 (13,2) BUT!
How? Can I do this?
Can I download the firmware from the iMac27 (13,2)
and replace the firmware from my iMac (12,2) or is
this not possible, because of the "wrong" iMac?
Because I have build the i7-3770 CPU! In my iMac,
it is the same Socket H2 (1155) but NO! Boot any more,
I think! Of the missing CPU-ID in the firmware of (12,2)
I'am right? Or NOT !?! Or how? Can i edit the firmware,
and ad the CPU-ID for all Ivy Bridge CPU's by myself,
with an APP or program! But with program I need?
And the second test! Was to build the GTX860M in my iMac
(MXM-Module) change, it is SIMPLE! But it boot's UP! But no
picture, just a black screen! But boot is WORKING! I have hear it,
with voice over! I think, the PROBLEM! Here was the missing!
Driver for my GTX860M, because I have not installed
the NVIDIA Web Driver, is this also right !?!
And I have also solved! The problem with the broken! HD6970M
with become! stripes or a blank screen, because of the heating!
OVER! Heating the GPU! This problem is known! Ok.
I don't want to OPEN! My iMac27 twice again, before I know, if
THIS! Konfiguration will WORK! So my question is, can this! will
be working! With a Web Driver! The newest for El Capitan (15G22010)
or have I Update to Sierra first, and then with the new GTX860M to
Mojave, because! Of the missing support for the HD6970M GPU!
So PLEASE! Give me a answer, THANK! You.
Greets
RedStarOne.