VDR backup limitation

Hi,

i am having 24 VMs running on my Vcenter. I am using VDR for my backup application. now i am going to schedule all 24 backups to be started at 12.00am. but i heard it can run 8 backups at once. so what will happen to other backups? backup schedule is as follows.

12.00am-7.00am (for all backups)

thanks