The "B75S1" naming convention suggests it is a revision 1 board. Samsung often used this board in mid-range office desktops (e.g., Samsung DM300, DM500, or All-in-One models).
The Samsung B75S1 fully supports both and 3rd Generation (Ivy Bridge) Intel Core processors. It accommodates everything from budget office chips to high-performance quad-core options: Intel B75 Express chipset processor support - CPU-Upgrade samsung b75s1 motherboard