The smartphone will come with a 3.8-inch ClearBlack WVGA display that offers up a resolution of 800×480, so it is immediately evident that one of the trade-offs between this model and the big boys is inferior screen quality. Nokia has chosen to power the Lumia 620 with a Qualcomm 1GHz dual-core processor and is offering 8GB of internal storage capacity with external memory support through via microSD card.
Source
Source