How many servers i can host on this

[zombiezach0]

Processor Configuration
1x Intel Xeon E3-1230 - 4 x 3.20 GHz +$0.00
Hyperthreaded
64-bit Compatible
8 MB Cache
Data Center
First Available +$0.00
Memory Configuration
16 GB DDR3 ECC +$0.00
Disk Configuration
1 TB Enterprise SATA +$0.00
Network Configuration
/29 - 8 Addresses, 5 Usable +$0.00
10 TB Metered +$0.00
100 Mbps Uplink Port +$0.00
Software Configuration
CentOS 6 +$0.00
64-bit +$0.00
99.99$ for each month,So how many servers can i host just alone on this dedicated server



And this one

Quad Dual-Core Opteron 8220
2.8Ghz - 4 Processors
8 Physical Cores 32GB DDR2 ECC 500GB • 20TB Monthly Transfer
• Linux/Windows* OS
• 5 usable IPv4 Address
• /64 IPv6 Address Block**
• Remote Reboot Access
for 59.00 a month


AMD Phenom II x6 1045t
2.7Ghz / 3.2Ghz Turbo
6 Cores / 6 Threads 8GB DDR3 500GB • 20TB Monthly Transfer
• Linux/Windows* OS
• 5 usable IPv4 Address
• /64 IPv6 Address Block**
• Remote Reboot Access

for 49.00 for a month


Dual Opteron 2216
2.4Ghz - 2 Processors
4 Cores / 4 Threads 4GB DDR2 ECC 146GB SAS • 20TB Monthly Transfer
• Linux/Windows* OS
• 5 usable IPv4 Address
• /64 IPv6 Address Block**
• Remote Reboot Access
or this for 35.00 a month

WHICH? is the best to choose from to host maxium servers ik the price but i like at least maxium for 40 bucks a month but which one should i go for?