Blizzard has released the minimum and recommended system requirements for Diablo IV’s Open Beta.
Diablo IV Open Beta PC System Requirements
Diablo IV Open Beta PC Minimum System Requirements
Operating System: 64-bit Windows 10
Graphics: NVIDIA GeForce GTX 660 or AMD Radeon R9 280
Processor: Intel Core i5-2500K or AMD FX-8100
Memory: 8 GB RAM
DirectX: Version 12
Storage: SSD with 45 GB available space
Internet: