Can i get alienware FX back on my PC as i got a new hard drive?

Yes, you can get Alienware FX back on your PC after installing a new hard drive, but you'll need to reinstall the Alienware Command Center software, which controls the FX lighting effects. Make sure to download the latest version from the DELL support website. After installation, you can customize your lighting settings as before. If you had any saved profiles, you may need to recreate them unless you backed them up before the hard drive change.