OWC 64GB RAM kit 8x 8GB chips OWC1333D3ECC8GB for Apple Nehalum and Westmere Mac Pro 4,1 and 5,1 in used and working condition. Each module has been tested.  It is guaranteed to be defect free, as described and is sold as is. PLESE NOTE: THE PICTURE IS ONE OF 6 SETS THAT ARE AVAILABLE AND THERE MIGHT BE SLIGHT DIFFERENCES IN THE LOOK OF THE PLASTIC CONTAINER AND /OR THE LABEL THAT IS ON EACH MODULE (FROM MANUFACTURER). Priority USPS shipping to continental US only. I ship next day to insure quick delivery, and it'll include insurance. Please ask any questions or concerns before bidding / purchasing. Thanks for looking!