Personally, I suggest buying ThinkPad, because ThinkPad is a professional business book with good quality, durability and good heat dissipation, but the following one meets your requirements. Although the memory is only 1G, the system memory can reach more than 2G!

Lenovo ThinkPad L430 24682bc [ThinkPad L430 series] 7499

Processor: Intel Core i7-3520M(2.9GHz/L3 4M)

Memory capacity: 4GB

Hard disk capacity: 500GB

Screen size: 14 inch

Graphics chip: NVIDIA Quadro NVS 5400m+ Intel HD 4000.

Memory capacity: 1GB