Solved: Precision M4800 : Input lag at log in, Switchable graphics not functioning, GPU fan "chirping" when ... - Page 5 - Dell Community
![Amazon.com: Dell M4800 15.6in FHD Ultrapowerful Mobile Workstation Business Laptop Computer, Intel Core i7-4900MQ 3.8GHz, 16GB RAM, 500GB HDD, WiFi AC, NVIDIA Quadro K2100M, Windows 10 Pro (Renewed) : Electronics Amazon.com: Dell M4800 15.6in FHD Ultrapowerful Mobile Workstation Business Laptop Computer, Intel Core i7-4900MQ 3.8GHz, 16GB RAM, 500GB HDD, WiFi AC, NVIDIA Quadro K2100M, Windows 10 Pro (Renewed) : Electronics](https://m.media-amazon.com/images/I/31b8ugvBuiS._AC_.jpg)
Amazon.com: Dell M4800 15.6in FHD Ultrapowerful Mobile Workstation Business Laptop Computer, Intel Core i7-4900MQ 3.8GHz, 16GB RAM, 500GB HDD, WiFi AC, NVIDIA Quadro K2100M, Windows 10 Pro (Renewed) : Electronics
![Precision Mobile Workstations M4800/M6800 will not clone displays with Switchable Graphics enabled | Dell US Precision Mobile Workstations M4800/M6800 will not clone displays with Switchable Graphics enabled | Dell US](https://supportkb.dell.com/img/ka02R0000008McdQAE/ka02R0000008McdQAE_en_US_2.jpeg)
Precision Mobile Workstations M4800/M6800 will not clone displays with Switchable Graphics enabled | Dell US
Solved: Precision M4800 : Input lag at log in, Switchable graphics not functioning, GPU fan "chirping" when ... - Dell Community
![DELL PRECISION M4800 I7/BIOSま み/動作不安定/詳しく動作未確認/ジャンク/現状販売/0723-4(15インチ~)|売買されたオークション情報、yahooの商品情報をアーカイブ公開 - オークファン(aucfan.com) DELL PRECISION M4800 I7/BIOSま み/動作不安定/詳しく動作未確認/ジャンク/現状販売/0723-4(15インチ~)|売買されたオークション情報、yahooの商品情報をアーカイブ公開 - オークファン(aucfan.com)](https://auctions.afimg.jp/s1060738422/ya/image/s1060738422.6.jpg)
DELL PRECISION M4800 I7/BIOSま み/動作不安定/詳しく動作未確認/ジャンク/現状販売/0723-4(15インチ~)|売買されたオークション情報、yahooの商品情報をアーカイブ公開 - オークファン(aucfan.com)
![External Display Feature on Precision M4800 with E-Port/E-Port Plus Docking Solution | Dell Dominica External Display Feature on Precision M4800 with E-Port/E-Port Plus Docking Solution | Dell Dominica](https://supportkb.dell.com/img/ka02R000000i1WfQAI/ka02R000000i1WfQAI_en_US_1.jpeg)
External Display Feature on Precision M4800 with E-Port/E-Port Plus Docking Solution | Dell Dominica
![Dallas Warren on Twitter: "Attempting to use external monitor with laptop (Dell M4800). Fn+F8 shows "No External Display", finally found ref "disable Optimus in BIOS", after disappearing down rabbit hole with others. Dallas Warren on Twitter: "Attempting to use external monitor with laptop (Dell M4800). Fn+F8 shows "No External Display", finally found ref "disable Optimus in BIOS", after disappearing down rabbit hole with others.](https://pbs.twimg.com/media/Dibmb5xUEAAxfom.jpg:large)