![Big Sur on iMac 27", Mid 2011, flashed 4GB NVIDIA Quadro K4100M by Nikey22, having issues with screen brightness, any ideas? Brightness control was working with Catalina Patcher, after installing Big Sur Big Sur on iMac 27", Mid 2011, flashed 4GB NVIDIA Quadro K4100M by Nikey22, having issues with screen brightness, any ideas? Brightness control was working with Catalina Patcher, after installing Big Sur](https://i.redd.it/xhgttch88b161.png)
Big Sur on iMac 27", Mid 2011, flashed 4GB NVIDIA Quadro K4100M by Nikey22, having issues with screen brightness, any ideas? Brightness control was working with Catalina Patcher, after installing Big Sur
![Per iMac 27 "A1312 metà 2009 2010 2011 6970m 1GB 2GB 109 C29657 10 aggiornamento per Nvidia K4100M GDDR5 4GB MXM TYPE B scheda GPU VIDEO|null| - AliExpress Per iMac 27 "A1312 metà 2009 2010 2011 6970m 1GB 2GB 109 C29657 10 aggiornamento per Nvidia K4100M GDDR5 4GB MXM TYPE B scheda GPU VIDEO|null| - AliExpress](https://ae01.alicdn.com/kf/H3ec3dc16fea943349ab586e40a591c1b1/Per-iMac-27-A1312-met-2009-2010-2011-6970m-1GB-2GB-109-C29657-10-aggiornamento-per.jpg_Q90.jpg_.webp)
Per iMac 27 "A1312 metà 2009 2010 2011 6970m 1GB 2GB 109 C29657 10 aggiornamento per Nvidia K4100M GDDR5 4GB MXM TYPE B scheda GPU VIDEO|null| - AliExpress
![Per iMac 27 "A1312 Mid 2009 2011 hd4850 6970m 1GB 2GB Upgrade aggiornamento per Nvidia Quadro K3000M 2GB GDDR5 K4000M K5000M 4GB|null| - AliExpress Per iMac 27 "A1312 Mid 2009 2011 hd4850 6970m 1GB 2GB Upgrade aggiornamento per Nvidia Quadro K3000M 2GB GDDR5 K4000M K5000M 4GB|null| - AliExpress](https://ae01.alicdn.com/kf/H2813cdbfb16a4383a52f17d87ca85c6fR.jpg)
Per iMac 27 "A1312 Mid 2009 2011 hd4850 6970m 1GB 2GB Upgrade aggiornamento per Nvidia Quadro K3000M 2GB GDDR5 K4000M K5000M 4GB|null| - AliExpress
![Per iMac 27 "A1312 metà 2009 2010 2011 6970m 1GB 2GB 109 C29657 10 aggiornamento per Nvidia GTX 770 GDDR5 3GB MXM TYPE B scheda GPU VIDEO|null| - AliExpress Per iMac 27 "A1312 metà 2009 2010 2011 6970m 1GB 2GB 109 C29657 10 aggiornamento per Nvidia GTX 770 GDDR5 3GB MXM TYPE B scheda GPU VIDEO|null| - AliExpress](https://ae01.alicdn.com/kf/H36d0529a055840d09dabb0b7315f9b6cj/Per-iMac-27-A1312-met-2009-2010-2011-6970m-1GB-2GB-109-C29657-10-aggiornamento-per.jpg_Q90.jpg_.webp)
Per iMac 27 "A1312 metà 2009 2010 2011 6970m 1GB 2GB 109 C29657 10 aggiornamento per Nvidia GTX 770 GDDR5 3GB MXM TYPE B scheda GPU VIDEO|null| - AliExpress
![2011 21″ iMac (HD6750M) [2nd,4C,S] + GTX 1050 Ti @ 10Gbps-TB1 (AKiTiO Thunder2) + macOS 10.13 & Win10 [NayChan] | External GPU Builds 2011 21″ iMac (HD6750M) [2nd,4C,S] + GTX 1050 Ti @ 10Gbps-TB1 (AKiTiO Thunder2) + macOS 10.13 & Win10 [NayChan] | External GPU Builds](https://i.imgur.com/eqqdvz5.png)
2011 21″ iMac (HD6750M) [2nd,4C,S] + GTX 1050 Ti @ 10Gbps-TB1 (AKiTiO Thunder2) + macOS 10.13 & Win10 [NayChan] | External GPU Builds
![SCHEDA GRAFICA APPLE iMac 2011 NVIDIA Quadro K2100M - 2 GB scheda video supporto metallo EUR 135,00 - PicClick IT SCHEDA GRAFICA APPLE iMac 2011 NVIDIA Quadro K2100M - 2 GB scheda video supporto metallo EUR 135,00 - PicClick IT](https://www.picclickimg.com/5IwAAOSwbRVkMzta/Nvidia-Gtx-780M-4Gb-Gddr5-Laptop-Graphic-Card.webp)