Nvidia GTX 675MX video card with 4GB RAM

Direct Replacement for AMD Radeon HD 6770M

(Apple part number: 661-5967)

for Apple 27" iMac A1312 2011 model only.


Please note this card uses a newer NVIDIA GPU chip which

supports the Metal API for running MacOS Mojave & Catalina.


Flashed with custom Apple firmware to enable Boot-screen and Brightness control.

Heat-sink mounting kit included – modified X bracket and thermal pads applied.

(Heat-sink not included, re-use the current one)


6 month replacement warranty is included