MemoryMasters 32GB (4x8GB) DDR3-1333 240-pin ECC DIMM for Apple Mac Pro 4,1 (2009)

Upgrade kit for Apple Mac Pro 4,1 (2009) — 32GB total capacity supplied as four 8GB modules (4x8GB). These DDR3-1333 240-pin ECC DIMMs are certified for MacPro4,1 systems and are suitable for machines with either 4 or 8 memory slots. For best results and compatibility, install all four matching modules.