HP 768395-601 - System board (motherboard) - Includes an Intel Core i7-4558U dual-core processor (2.8GHz, 4MB Level-3 cache, 28W TDP) and AMD Radeo

System board (motherboard) - Includes an Intel Core i7-4558U dual-core processor (2.8GHz, 4MB Level-3 cache, 28W TDP) and AMD Radeon R5 M255 graphics with 1GB discrete memory - For use on models with Windows 8.1 Professional