I could run any non-3D stress stably at cas 2-5-2-2-1T up to 210MHz at 2.7V, anything higher required me to relax timings ot 2-6-2-2. Didn't test the theoretical max though, as my 9700pro/A7N8XD refused to do any 3D over 195MHz, so I didn't see a point. Running at 190MHz 2-5-2-2-1T now at 2.6V. Just an FYI, going over 2.7V voids your warranty with Corsair.
Chiz