Maybe a little late, but I'm using the board with an i3 530, and talking to a 1080p TV over HDMI, and all is OK.
A few minor niggles are that at startup, the Win7 splash screen is offset (misses the left third of the screen), but this may be the TV, not the board?
When it fully boots, it is fine at 1080p
Must have the latest drivers to get sound working over HDMI.
Also, if the TV is off when it boots, the mobo seems to blank the HDMI, and doesn't recover when the TV is switched on- this requires a 'blind' restart.