https://www.gamespot.com/articles/call-of-duty-black-ops-4-pc-beta-system-specs-reve/1100-6461006/

Call of Duty: Black Ops 4 is preparing to kick off its open beta later this week. If you're planning to jump in, now is the time to make sure your PC is up to snuff. To that end, Activision has revealed the minimum and recommended specs for the open beta, though it's careful to note these specs are for the beta only--which means they may change slightly before the final game release.

The beta will be handled through Battle.net, so first and foremost, make sure you have an account ready. The multiplayer beta will cover six modes: team deathmatch, domination, hardpoint, kill confirmed, search and destroy, and control. Six maps will be available, including two that haven't been available in previous previews--Gridlock and Hacienda.