Intel says HD 4000 graphics driver update will boost performance by 10 percent - Liliputing
Performance and Scaling Overview of Intel HD Graphics 4000 - NotebookCheck.net Reviews
Intel HD Graphics 4000 Specs | TechPowerUp GPU Database
Guide][Gaming] Get the maximum performance out of your Intel HD Graphics 4000/ 4400/ 4600/ 5500/ 520/ 530/ 620/ 630 with these tips. – Unleash Your Laptop