heres what I found for dayz .. not much to run it but seeing you got the server clients running you should have all this info .. this is why I asked what do you really need to know ??
CPU: Modern Quad Core @ 2.0Ghz+ (CPU is the main bottleneck for an ArmA server, so the more powerful the better)
-RAM: 8GB (RAM isn't a big issue in an ArmA server, so don't be overly concerned with having copious amounts)
-Storage: 50GB+ HDD - 500 IOPS minimum. SSD or 15k RPM SAS is recommended.
-Network: 100Mbps+ dedicated. Bandwidth cap must be at least 2TB or more.
-Slots: All servers must be running at 40+ slots, or 30+ in areas where bandwidth is expensive and where permitted. (Usually reserved for developing countries or remote regions)
-Operating System: Windows 2003, 2008, 2008 R2