HP Proliant DL380 G7 and G8 memory and ssd upgrade

Hello Everyone

We have Some HP Proliant DL380 G7 and Gen8 Servers that we want to upgrade the memory and CPU also add an SSD disk to each one. here's our configuration

Model         CPU                        Freq        Cores     Memery per Slot  Total Memory
G7               1xE5620              2.4            4                  8,4,4                          ( 16 Go )
G8               1xE5-2609         2.4            4                   8,8                             ( 16 Go )
G8               1xE5-2609         2.4            4                   8,8                             ( 16 Go )
G8               2xE5-2630 V2  2.6             4                   8,8                             ( 16 Go )
G7               2xE55620          2.4             4                   4,4,4                          ( 12 Go )

the question is wich memory type to choose to suit our current config and we want to reach 32 Go or 64 Go on each server . how many Ram per remaining Slot we can add . what do you guys suggest ?

also wich SSD Disk Type Will fit for those servers ,  we want to add 64 Go SSD Disk Drive ,

will this SSD Drive Work Without Adding any Controller To support it ?

also We want to Double The Cpu on the servers that have only One CPU . will we add the same CPU or we can Add another Type ? . 

And thanks for your Help