WD 750 Black not showing up

Ive just bought a WD 750 black to go along with my WD 500 black and the 750 black is not showing up in “my Computer”

It shows up in Speedfan (temp monitor) and in the Bios / and Device manager  Im running Vista 64 on

Asus M4a79deluxe MB In bios everything is set to (auto) same as the 500 black I have it running on SATA  port 5 and the 500gb on port 1 so they would be on seperate controllers. Niether HDs have jumpers  Please help

I ended up fixing the problem by Start, right-click on My Computer and select Manage. Then open Disk Management. Here you can set up a partition, assign a drive letter and format it