I will said it's a side move if you use an 980x OC to 4.2+ ghz... not vs the quadcore I7 1366. ( i was using a 950 )
Lol SB are damn fast, and specially they overclock without effort to 5ghz on air and maybe 4.8 for the really bad chips ( need really be unlucky)... lol benching at 5 - 5.4ghz on air cooling is just a little dream for most I7 users... Before you needed Dry ICe or good SS and good chips for that. i run stable 24/7 at 5ghz.
Cinebench 11.5 @ 5ghz ( or 4.9 don't remember ) ( an I7 980x OC@4.4ghz do something like 8.91 on this bench )
http://img121.imageshack.us/img121/5169/cinebench.png[/IMG]
They match 6cores CPU (970-980x) at 4.2ghz under Highly Multithreaded appliccations, and on non multithreaded applis, they completely smoke them with stock speed ( 3.4ghz/3.8 turbo ).
actually, they cost less of a 950, you can find cheap motherboard, or invest on high end mb. And specially when does 2011 and new high end socket cpu will be released ?