Yes, it will fit. Mine fits easy in my Antec 1200, which is 8.40 inches wide. The CM 690 is 8.39 inches wide, so plenty of room.
You will want it install vertical when you case is upright. This is the direction of your airflow, so it is the best way to install. It won't block RAM slots that way either.
------------------------------You can select me as Best Answer e6400 oc'd 3.2ghz,CCF cooler
3870x2, p5k/epu
750watts psu, antec 900
Reply to overshocks
------------------------------You can select me as Best Answer e6400 oc'd 3.2ghz,CCF cooler
3870x2, p5k/epu
750watts psu, antec 900
Reply to overshocks