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

[leksok]

я

Hello, i have a imac mid 2010 27“, i bought a quadro m2000m and i only use windows. i only get a black display, do i only have to flash the vbios, if so do i need a specific one or is the card completely incompatible with the mac?

Hello, the video card works fine under Windows. But there's a catch. You need to know how you installed it, from a CD or a flash drive. If it's from a CD, the picture will appear, but the backlight won't work. If it's from a flash drive, the picture and backlight will appear, but the sound won't work. To fix the sound, you need to edit files in Windows itself.

 

[imacker2011]

You cannot alter the vBIOS (it has been signed), so you will never get the display discovered as an internal one and you will not have brightness control unless you are willing to use a hardware solution to control it. Achieving all this needed OpenCore vBIOS injection, which only works with macOS.

I had to do all the hardware stuff with the RX6600M (runs only in 2009/2010 like some RX480 and WX7100, has at least twice the performance of the 5500XT), but it is not worth the trouble when you end up with an 2010 CPU system.

At some point in future we may see RX5500XT / RX6600M support for macOS versions later than Monterey. Right now the team lost a little bit momentum. Personally I bought a little M4 mini, with outperforms all my iMacs in any competition you may throw at it.

FWIW, the seller offered a RX6600M as well (for a ridiculous price of 350$). But I agree with you, it's actually not worth it. For work purposes, I also mainly switched to a MBA M4 with 2 external monitors. Still using one of my iMacs 2011 with Sequoia as a fallback machine. My intention with the AMD card was mainly to get better Linux driver support once Apple completely drops Intel. While the Kepler cards work with the latest Nouveau/Mesa/NVK packages, performance is still only around 50% of Windows.