Solved: Precision M4800 : Input lag at log in, Switchable graphics not functioning, GPU fan "chirping" when ... - Dell Community
Dell Precision M4800 15.6" FHD Intel i7 4700MQ 2.40GHZ 16GB 512GB Laptop NO OS | eBay
Dell Precision M4800: BIOS Updated from A23 to A26 - YouTube
Dell Precision m4800 GPU not working in Windows - Dell Community
BEST GUIDE: How to Update Dell BIOS - Appuals.com
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.
Solved: Precision 3640 No USB Boot Option - Dell Community
Dell Precision M6800 Bios Bin
Dell Precision M4800 Bios Bin
How to update the bios in the Dell Precision laptop - YouTube