Old drive into my new build

[seanny]

How can I use different applications(mainly play games) with a drive I had in an old build??I just took out a 300gb 10,0000 rpm wd velociraptor out of my old Dell and installed it in my new build.I want to play the games and or go through existing files.I just tried but didnt dive too deep for fear of wrecking something.So, I figured I would ask you guys.There is 179gb worth of valuable info and games I need to access,but how?

 

[seanny]

I forgot to add that My main drive is a Seagate Barracuda 7200rpm,2tb