HP 646328-001 - System board - Mobile Intel HM65 chipset with AMD Radeon HD 6490M, 1GB (discrete) graphics memory - For use in discrete models with Retail
HP 748839-001 - System board (motherboard) - HM76 chipset and NVIDIA 820M graphics with 1GB discrete memory - For use in models without Windows 8 Retail
HP 748839-501 - System board (motherboard) - HM76 chipset and NVIDIA 820M graphics with 1GB discrete memory - For use in models with Windows 8 Retail
HP 642754-001 - System board - For use in models with 1GB discrete graphics, WLAN, WWAN, and vPro (8M) - (For use in all countries and regions exce Retail