eBay

Samsung 16GB (1x16GB) DDR3 1333MHz PC3L-10600R (2Rx4) ECC Registered Memory MacPro. 240 pin DIMMs.

This RAM was designed for server use, and you can use this in your 2009, 2010, and 2012 Mac Pro 4.1 or Mac Pro 5.1. These come with the heat shields in place (again, for heat dissipation in a server environment).

Best when installed in pairs, and so that all memory is the same (DDR3 1333MHz PC3L-10600R (2Rx4) ECC Registered).

Again, these are all identical, Samsung 16GB (1x16GB) DDR3 1333MHz PC3L-10600R. Tested and guaranteed, no DOA.

Select QTY needed in the drop down. Discounts for multiple units are shown in the listing.

All are shipped for a flat price of $5.50 USPS Ground Advantage (with tracking), or $9.50 USPS Priority (with tracking), regardless of QTY ordered.