How to install a GTX 970 SC in an Alienware X51. (English)

UPDATE 11/23/14: So far everyone who has had problems using the 970/980 have the X51 R1, meanwhile the R2 can run the 970/980 without any issues. Since I didn't want to downclock the GTX 970, I decided to move the X51's components to a new case (Silvertone RVZ01) with a bigger power supply: / watch v=qJBwdBZzySs&list=UU0vzydsUkp-MHVwAUx_Q79A
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Card Used: www.newegg.com/...
3DMARK Firestrike score: 9475
Alienware X51 R1
-Intel I7 3770
-8GB ram 1600 MHz
-240GB Intel SSD
-480GB PNY SSD
-330w Power Supply
-EVGA GTX 970 SC
-Removed optical drive