"official support" and actual capability are two different things. Intel Core i7-980X Processor Extreme Edition Memory Specifications
In this review i7 980X was tested with Corsair CM 3X2G 1800C8D DDR3 running @ 1333 MHz 8-8-8-20 2T.
You can read the memory subsystem performance tests here: http://techreport.com/articles.x/18581/5
The G Skill Trident will run with the i7 980X. Your motherboard and tweaking patience will probably determine how fast it will run.
One NewEgg i7-980X owner reported that for his EVGA E760 Classified and OCZ memory he had to manually set 1600-8-8-8-24 @ 1.65v