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iM 4,1-14,4 2011 iMac Graphics Card Upgrade

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Strangely enough, when I went to flash new WX7100GOP.ROM, it told me chip content was identical already. Thoughts?
 

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Emilio306 said:
Strangely enough, when I went to flash new WX7100GOP.ROM, it told me chip content was identical already. Thoughts?
Click to expand...
Let me guess, again:

- You told the seller what you are planning to do with this card?
- Another guy already tried this card, just kidding...
- You took the blue pill, or was it the red one?
 
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nikey22 said:
@stephengrenfell
1. Please confirm first which bootrom version you have on your mainboard
Click to expand...

Can I get that from command line using SSH ?.

If it helps macOS installed is 10.13.6

nikey22 said:
2. Disconnect LCD, disconnect SSD, disconnect HDD. Put in USB key:grml.org
Let it boot up. You should hear chime, ODD noise, and maybe fans will run full speed.
Go to another machine and see if your imac is detected on your DHCP router. If so, SSH into it from another machine (PC/or MAC).
Click to expand...

Code: 
NVIDIA Firmware Update Utility (Version 5.414.0)
Simplified Version For OEM Only
Adapter: GeForce GTX 780M     (10DE,119F,1028,05AA) H:--:NRM  S:00,B:01,D:00,F:00


Identifying EEPROM...
EEPROM ID (C2,2012) : MX MX25L2005 2.7-3.6V 2048Kx1S, page
Reading adapter firmware image...
IFR Data Size         : 1004 bytes
IFR CRC32             : 4FCFF2B2
IFR Image Size        : 1024 bytes
IFR Image CRC32       : BBE64D3C
IFR Subsystem ID      : 1028-05AA
Image Size            : 226304 bytes
Version               : DE.AD.00.BE.EF
~CRC32                : 34A6ACF5
Image Hash            : B1969C94DFBB89BDB1969C94DFBB89BD
OEM String            : NVIDIA
Vendor Name           : NVIDIA Corporation
Product Name          : GeForce GTX 780M by Nick[D]vB
Product Revision      : Chip Rev
Device Name(s)        : GeForce GTX 780M
Board ID              : E128
PCI ID                : 10DE-119F
Subsystem ID          : 1028-05AA
Hierarchy ID          : Normal Board
Chip SKU              : 750
Project               : 2053-0001
CDP                   : N/A
Build Date            : 08/19/19
Modification Date     : 08/19/19
UEFI Support          : Yes
UEFI Version          : No Version Found or Out-dated
UEFI Variant Id       : No Version Found or Out-dated ( Unknown )
UEFI Signer(s)        : Unsigned
InfoROM Version       : N/A
InfoROM Backup Exist  : NO
License Placeholder   : Absent
GPU Mode              : N/A
Sign-On Message       : iMac hacks by Nick[D]vB - OverClocking
mod by Johnksss & svl7
** Tech|Inferno **

nikey22 said:
and let me know what Board-Id you have for your GTX780M card.
Click to expand...

The board is marked E164671 Z 4M.
[automerge]1589475981[/automerge]
tgaillar said:
Any basic/non-Apple MiniDP<->DVI/HDMI/DP cable (matching the display connector on your external display) will just do fine to connect your iMac (2009->2011, even 2012/2013+ is OK) and test external display! ;)
View attachment 915038View attachment 915039 View attachment 915041
Click to expand...

Gotcha, but don't have any thunderbolt / mini DP cables. See if i can get one locally tomorrow, otherwise Amazon / eBay.
 
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Ausdauersportler said:
Code: 
sudo /usr/libexec/firmwarecheckers/eficheck/eficheck --integrity-check
Click to expand...

Booted on original SSD remote in via SSH gives

EFI Version: IM121.88Z.F000.B00.1906140041
Primary allowlist version match found. No changes detected in primary hashes.
SEC Version: IM121.AAPLEFI4.88Z.0009.I03.1102091754
SEC allowlist version match found. No changes detected in SEC hashes.
iMac-Stephen:~ admin$
 
Emilio306 said:
Strangely enough, when I went to flash new WX7100GOP.ROM, it told me chip content was identical already. Thoughts?
Click to expand...
That is what your screenshot states when you ran it a second time, which makes sense. Did the WX7100.LOG file generated by the first flash also state that? That is where you redirected the output when you flashed it the first time.
 
thanks highvoltage....somehow that cable ended up at the middle section rather than the right hand side :/ all sorted and good but i will need to swap my ram about as dimm 0 & 1 dont match with the matching sizes or does this matter?

cheers
 
stephengrenfell said:
Booted on original SSD remote in via SSH gives

EFI Version: IM121.88Z.F000.B00.1906140041
Primary allowlist version match found. No changes detected in primary hashes.
SEC Version: IM121.AAPLEFI4.88Z.0009.I03.1102091754
SEC allowlist version match found. No changes detected in SEC hashes.
iMac-Stephen:~ admin$
Click to expand...
This is the same that I have here: 87.0.0.0.0 - the latest. My time stamps are different :)
 
stephengrenfell said:
This is what happens without lcd installed.

- connect power cord, 1st led lights up immediately
- press power on once nothing happens
- press power on second time
1. second led lights up and fans run a slow speed
2. few seconds later optical drive noise (usual noise)
3. few seconds later chime noise and third led lights up
4. 30 seconds later fan start to run at full speed, and it stays like that

Is the fan full speed due to lcd thermal sensor not connected ?.
Click to expand...

sounds like macos is up and running with fans on full because thermal sensor not connected
 
Last edited:
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liquidtwitch said:
Complete guide on how to flash your iMac's boot rom and 765m/770m/780m gpu in order to get boot screen and the cards working with both MacOs and Windows:

Please others chime in if I'm incorrect with any of this.

This assumes you either already have Windows installed, or you have the ability to install Windows.
Some of this is how I would go about doing it, as with most things there's other ways and it pretty much comes down to what you're comfortable with.

Edit: updated with correct version of UEFITool
Click to expand...

I got a toshiba Qosmio x75-A7170 770m GPU, It will work?
 
highvoltage12v said:
Do you have the laptop in working condition to complete the flash? Otherwise you have to use a clip/ch341a.
Click to expand...

I do not have. I bought the GPU online from a person who had this notebook that had no repair and was selling the functional parts. then I bought it to upgrade my Mac.
[automerge]1589483849[/automerge]
Antônio Nicola said:
I do not have. I bought the GPU online from a person who had this notebook that had no repair and was selling the functional parts. then I bought it to upgrade my Mac.
Click to expand...
But I have another laptop working with Windows10. I am without north. lost with this issue of rom, vBios. I'm trying to find out as much as possible before putting the GPU on my iMac. but it's very difficult, I don't know much about Mac.
 
at this moment i have got 3 cards
K610M
K2100M
K1100M

On K610M i can normally run MacOS (high sierra) and work, Etc. (no bootscreen ofc)
On K1100M and K2100M using @Nick [D]vB roms i got only white screen - it couldnt boot etc.
With stock Bioses - its the same but black screen

any ideas?
 
Last edited:
_Beckett said:
at this moment i have got 3 cards
K610M
K2100M
K1100M

On K610M i can normally run MacOS (high sierra) and work, Etc. (no bootscreen ofc)
On K1100M and K2100M using @Nick [D]vB roms i got only white screen - it couldnt boot etc.
With stock Bioses - its the same but black screen

any ideas?
Click to expand...
Hi! Which system, which OS, which firmware version...?
 
@Pascal Baillargeau

I had to take the logic board out in order to install the WX7100 because the heatsink frame had the screws in upside down and had only bolts on the side facing me when I opened it up. That said, I booted but had no such luck getting a display, also the CPU fan went wild and the power shut off. Turned it back on, again no display and power shut off again. I made sure everything was connected again correctly. Have macs fan control running and the only sensors that weren't connected are ODD sensor and GPU heatsink sensor because I left the heatsink off just to test the GPU. Has anyone run into this? I'm about to take the GPU out and send it back to China, but want to see if I missed anything first.
 
Emilio306 said:
@Pascal Baillargeau

I had to take the logic board out in order to install the WX7100 because the heatsink frame had the screws in upside down and had only bolts on the side facing me when I opened it up. That said, I booted but had no such luck getting a display, also the CPU fan went wild and the power shut off. Turned it back on, again no display and power shut off again. I made sure everything was connected again correctly. Have macs fan control running and the only sensors that weren't connected are ODD sensor and GPU heatsink sensor because I left the heatsink off just to test the GPU. Has anyone run into this? I'm about to take the GPU out and send it back to China, but want to see if I missed anything first.
Click to expand...
Please, put the heatsink with thermal past, just plug everything as before you open this iMac. We don't care about macs fan control before entering desktop.
What's the diag leds say?
 
Last edited:
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Pascal Baillargeau said:
Please, put the heatsink with thermal past, just plug everything as before you open this iMac. We don't care about macs fan control before entering desktop.
What's the diag leds say?
Click to expand...

Going to have to put the old card in and wait for the new heatsink, WX7100 MXM-B doesn't fit on the Radeon 6770M MXM-A heatsink. :( It's okay, I'm sure the vendor will take their time getting back to me. That and it's not like any of us are going anywhere anytime soon lol... Diag lights 1 and 2 when I power up, but not 3 and 4 so either I need to try again with the heatsink to make sure the GPU is properly connected or the card goes back to China! @Pascal Baillargeau definitely got zapped putting the LCD back in. LOL!
 
Last edited:
How do I also activate the Nvidia GTX 770m iMac boot screen? Step by step. I am not an advanced user in programming. I downloaded Nick's rom, but I don't know what to do now. Not to mention that my English is very limited
Thank you.
 
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Borak said:
How do I also activate the Nvidia GTX 770m iMac boot screen? Step by step. I am not an advanced user in programming. I downloaded Nick's rom, but I don't know what to do now. Not to mention that my English is very limited
Thank you.
Click to expand...


I am in the same situation as you (770m), with the help of the community to upgrade the right way. I wish you good luck. Where you are from?
 
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