GPU-Z Video Card GPU Information Utility v0.4.6 Released - Legit Reviews
Video Card errors [nvidia gt 420m] - Microsoft Community
The laptop motherboard for acer aspire 5742 5742g LA 5893P MBBR702001 NVIDIA GeForce GT 420M Full test|motherboard for acer aspire|motherboards for laptopsmotherboard motherboard - AliExpress
Download and install NVIDIA NVIDIA GeForce GT 420M - driver id 193656
NVIDIA GTX 470M highlights rollout of 400M mobile GPU series | Engadget