I was in the process of purchasing a MacBook Pro with these specs below. $2,299.00 15-inch MacBook Pro with Retina display 2.8GHz Quad-core Intel Core i7, Turbo Boost up to 4.0GHz 16GB 1600MHz DDR3L SDRAM 256GB PCIe-based Flash Storage But was told that dedicated graphics will come only if I upgrade to 512 GB of storage? Is it true that even though I upgraded everything to max except hard drive storage, I will not get dedicated graphics? Or was it just salesperson way of getting me to spend more money? Thanks!