Need help with storage

[WokerGaming]

Today i installed 212 evo on my gd65 990fx and 8350 processor,while doing so i had to plug off all attached to mobo and then reatached it,when i first started computer after retaching i saw smoke comming out of hard disk and fastly disabled power supply to stop it,but now when i plug white part of cable which goes from mobo to hard disk (little white cable) everything starts up but when i try to plug (i think its double bigger in lenght and it goes from plug next to processor and into hard disk) my computer doesnt even start but when i plug it off everythings goes perfect (ofc theres no booting but i get this message
EFI Shell Version 2.31 [4.633] Current running mode 1.1.2 Map: Cannot find required ma name
Press Esc in 5 seconds to skip startup.nsh, any other key to continue
i have 500 gb hitachi storage which is about 6-7 years old and was working perfectly

after my mobo logo goes i get efi message i wrote and thats about it,please someone give me advices about this since i have about 100 gigs of video editing i was doing
my full specs

R9 280X overklokovana na 1150
Procesor:AMD 8350
212 EVO
RAM:2x4GB Patriot Viper 3
Maticna ploca:990FXA-GD65
630w thermaltake powersupply

 

[Ketchup]

Is the drive spinning when you turn the computer on? See any burn marks on the drive? If the drive won't spin when given power. it will probably mean you need to start looking a data recovery sites.

 

[Gunbuster]

Sounds like you smoked the drive. If the data is really important you need to get in touch with someone like this: http://www.krollontrack.com/data-recovery/