Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

Gnx231

macrumors member
May 8, 2021
45
9
Hmm, doen't it have to be at least UEFI and not legacy bios?

If you have access to the chip (meaning you went trough the mess of removing this monster of a carbon glued cooler of the 6800/6900/xt), also a USB-hardware programmer like the well known and cheap CH341A will do. The chip does not have to be desoldered to get it programmed!
I have this chip programer already. I used it to flash my titon ridge thunderbolt card.
 

flyproductions

macrumors 65816
Jan 17, 2014
1,086
461
My bad. Didn’t realize it is not accessible as the old cards.
Yes, it can be bit of a nightmare to get there for this cards!

I have some brandnew RX 6800 founders, which i wanted to flash with the programmer. I allready had the backplate off. As i realized the cooling unit did not even come off easily with all the screws removed, i gave up and looked out for some friend with a PC. I didn't want to damage or even destroy something at this expensive card. Later i read somewhere about the cooler beeing glued to the GPU-die with some sort of carbon/epoxy.

It sure is not an easy and riskfree task to get this thing off!
 
  • Like
Reactions: startergo

startergo

macrumors 603
Sep 20, 2018
5,020
2,282
Metal score for RX6950XT spoofed in Ventura is 236518:
 

avro707

macrumors 68020
Dec 13, 2010
2,263
1,654
Yes, it can be bit of a nightmare to get there for this cards!

I have some brandnew RX 6800 founders, which i wanted to flash with the programmer. I allready had the backplate off. As i realized the cooling unit did not even come off easily with all the screws removed, i gave up and looked out for some friend with a PC. I didn't want to damage or even destroy something at this expensive card. Later i read somewhere about the cooler beeing glued to the GPU-die with some sort of carbon/epoxy.

It sure is not an easy and riskfree task to get this thing off!

If you know someone with a 7,1 Mac Pro they can also flash it for you in Windows.

That’s how it did my RX6600XT using my 7,1 and egpu enclosure along with windows 11.
 
  • Wow
Reactions: prefuse07

macsoundsolutions

macrumors regular
Jan 12, 2010
205
101
Just installed a RX6900 XT in my Mac Pro 7,1.

Using displayport with a InnoCN 27m2v monitor

Windows bootcamp gives me 4k 120hz VRR
OSX only gets me 60 fps no VRR

Anyone knows how to solve the issue?
Any luck? same thing for me Mac OS Monterey 12.6.5 60hz Windows 120hz with Aorus 48 inch oled. Using display port tried hdmi 2.1 also but no luck with rx6800xt
 

lukethemore

macrumors newbie
May 14, 2019
21
23
Milano (Italy)
Just installed a Sapphire Pulse RX 6600 (no XT) on my 4,1 > 5,1 ... everything is working great.


I followed your instructions for "fixrx6x00rom" and everything worked at first try.


I'm using the flashed card on my main Mac Pro with latest Monterey (actually 12.6.6): I tryed it on my second Mac Pro with Ventura but I had problems during booting process ... maybe I forgot something to do on Ventura ?


Here some bench scores:

- RX590 (old card) > 39.447 (Geekbench 6 - Metal) > 36.611 (Geekbench 6 - OpenCL)
- RX6600 (new card) > 84.492 (Geekbench 6 - Metal) > 47.840 (Geekbench 6 - Open CL) > 21.752 (LuxMark)
 

traderdude123

macrumors member
May 12, 2023
81
50
Apple has blocked 4k 120hz for AMD 6000 Series cards, even though they support hdmi 2.1.

Any hackintoshers or e-GPU owners with 6800 XT getting 4k 120hz RGB 10 bit? The same AS Macs with hdmi 2.1/USB-c ports can easily do 4k 120hz RGB 10bit.

A real shame good hardware gone to waste.
 

macsoundsolutions

macrumors regular
Jan 12, 2010
205
101
Apple has blocked 4k 120hz for AMD 6000 Series cards, even though they support hdmi 2.1.

Any hackintoshers or e-GPU owners with 6800 XT getting 4k 120hz RGB 10 bit? The same AS Macs with hdmi 2.1/USB-c ports can easily do 4k 120hz RGB 10bit.

A real shame good hardware gone to waste.
Screen Shot 2023-05-25 at 8.16.31 PM.png
So after using SwitchresX I am now getting 4k 120Hz
 

Gnx231

macrumors member
May 8, 2021
45
9
Ok getting my Rx 6800 today. Got my very old windows pc to see my rx 580 so i think its ready to flash the 6800. Crossing my fingers haha.
 

Gnx231

macrumors member
May 8, 2021
45
9
so having some issues. can't get amdvbflash to load. keeps saying The procedure entry point D3DKMTMakeResident could not be loacted in dynamic link library GDI32.dll.
 

h9826790

macrumors P6
Apr 3, 2014
16,656
8,587
Hong Kong
so having some issues. can't get amdvbflash to load. keeps saying The procedure entry point D3DKMTMakeResident could not be loacted in dynamic link library GDI32.dll.
Try Linux, just make a bootable LiveUSB is good enough, no need to install anything.
 

Gnx231

macrumors member
May 8, 2021
45
9
So my pc is old. it has a athlon 64 in it with 2gm ram. says i can't put windows 10 on due to cup. been trying everything to get amdvbflash to load it just won't. I can do everything except get the flashing program running. here is a pic of what gpu-z shows.
PXL_20230527_212434930.NIGHT.jpg
 

traderdude123

macrumors member
May 12, 2023
81
50
But what is the monitor reporting? There will be some button when pressed , will show details of the receiving signal. usually a small info window. That window should show resolution/refresh rates/color depth...etc.

What is the info shown by the monitor?

Apple never allowed 4k/120hz RGB 444 10 bit as of now. you may get 4k 120hz , but not full RGB 10 bit.

For e.g I have a LG CX , when I press the green button on my remote. it shows all the details. With a RX 6800 XT on Ventura 13.4. Best I could get was 4k 60hz RGB 10 bit or 4k 120hz YCBCR 420 10 bit. We do not want YCBCR. We want full RGB 10 bit.
 

Gnx231

macrumors member
May 8, 2021
45
9
here is what it says. can't figure it out. so old it won't let me boot from usb so linux is out.
 

Attachments

  • PXL_20230529_164122215.jpg
    PXL_20230529_164122215.jpg
    652.8 KB · Views: 66
  • PXL_20230529_164139616.jpg
    PXL_20230529_164139616.jpg
    792.3 KB · Views: 72
  • PXL_20230529_164139616.jpg
    PXL_20230529_164139616.jpg
    792.3 KB · Views: 59

traderdude123

macrumors member
May 12, 2023
81
50
here is what it says. can't figure it out. so old it won't let me boot from usb so linux is out.
if your pc is that old, you can try the dos version of

AMDVBFlash.​

 
  • Like
Reactions: hwojtek
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.