Premium Apple Parts + Fast Shipping. Apple Mac Pro Logic Board. CONDITION: Used 100% OEM Original Apple Part Tested 100% Working,  Fresh Pull From Fully Working Unit. INCLUDES: Apple Mac Pro Logic Board As Pictured Only. IDENTIFYING NUMBER:  Board: 820-3637-05, 661-7527 COMPATIBILITY: 13″ Late 2013 MacPro A1481 MacPro6,1