Supply and demand. You can run the 2400 Tri's at 1866 (and with the tighter timings and possibly even CL7) if you want but see no reason not to run 2400 if the CPU and mobo can take 2400
Supply and demand. You can run the 2400 Tri's at 1866 (and with the tighter timings and possibly even CL7) if you want but see no reason not to run 2400 if the CPU and mobo can take 2400