Blizzard Entertainment shared the minimum and recommended PC requirements for the Diablo 4 open beta during its most recent live stream.

If you're curious, here are the system requirements for the second open beta of Diablo 4:
Minimum System Requirements
- OS: Windows 10 (64-bit)
- GPU: Nvidia GeForce GTX 660 / AMD Radeon R9 280
- CPU: Intel Core i5-2500L or AMD FX-8100
- Memory: 8GB
- DirectX: Version 12
- Storage: 45GB
- Internet: Broadband connection
Recommended System Requirements
- OS: Windows 10 (64-bit)
- GPU: Nvidia GeForce GTX 970 / AMD Radeon RX 370
- CPU: Intel Core i5-4670K / AMD R3-1300X
- Memory: 16GB
- DirectX: Version 12
- Storage: 45GB
- Internet: Broadband connection
Blizzard Entertainment has been through hell and back trying to push Diablo 4 out. It's believed that the studio is crunching hard to meet the current June 5 release date of Diablo 4.
There are also reports suggesting that Diablo 4 will be delayed, but this isn't confirmed yet.
Outside of the game's development, Activision Blizzard has been subject to much scrutiny and controversy in the past few years. In addition, Microsoft is actively trying to acquire Activision Blizzard for $70 billion.
If we're being honest, we're surprised that Diablo 4 looks as polished as the early previews are saying.
With that said, there's plenty of anticipation surrounding the second open beta for Diablo 4. It should give players a better look at the game months ahead of its release. More importantly, it will serve as a good litmus test for Blizzard to decide if it should delay Diablo 4 or not.