Testing conducted by Apple in October 2018 using pre-production 2.9GHz 6‑core Intel Core i9‑based 15-inch MacBook Pro systems with Radeon Pro Vega 20 graphics, and shipping 2.9GHz 6‑core Intel Core i9‑based 15‑inch MacBook Pro systems with Radeon Pro 560X graphics, both configured with 32GB of RAM and 4TB SSD.