This is not death metal, but is a good boost song!
Now I strongly recommend you to check out this band from Italy, they are into some very powerful Symphonic Death Metal, yet they are nothing like other bands! Definitely powerful and a must-listen imo.
This song comes from an older Mastodon album, but also great song with technical rhytms. Current songs of the band are highly energetic and funny! (PS: You can also remember this song from the game Need For Speed Most Wanted)
Special one. If you are a guitar-player, or know the basics of it, you can clearly understand that almost impossible guitar playing this band has. Highly technical, and definitely not for the weak ears.