64 bit 1 GB DDR3 cripples the NVS 4200. If it was 128 bit DDR3 then the NVS 4200 would be faster than the HD 4000 for sure. But the NVS 4200 uses cheap 64 bit DDR3. I'm using this site as a reference. NVS 4200m NVIDIA NVS 4200M - Notebookcheck.net Tech HD 4000 Intel HD Graphics 4000 - Notebookcheck.net Tech iGPUs can greatly be affected by the type of RAM used in the system so if you are using 1333 MHz RAM instead of 1600 MHz RAM with your Core i7 , the iGPU will be slower than it should be.