Samsung 712n Question/Issue

[Beast]

Should i have to enable V-Sync for there to be no ghosting? If it is not turned on, i get tons of ghosting. Once turned on, it is all gone. The games I must do this in is COD:UO, COD, and MOHAA. I also have the BFG 6600 GT OC. I was wondering if i should have to do this with a 12ms Response Tme LCD?? Any input would be appreciated.