Crucial Ballistix Sport XT 8 GB (1 x 8 GB) DDR3-1866 CL10 Memory (BLS8G3D18ADS3) - PCPartPicker
Crucial Mac Pro Systems (Late 2013) 32GB (2 x 16GB) DDR3 1866 (PC3 14900) ECC Registered Memory For Mac Pro Systems Model CT2K16G3R186DM System Specific Memory - Newegg.com