I do NOT have the ability to test these ram sticks so there is no guarantee on lifetime or functionality.there is no visible damage on them, they are in good physical conditionI have two pair of these ddr2 g.skill 1gb ram sticks, photos of both pairs are are provided.they are very similar but are NOT exactly the same, one has a square silver pattern and the other has a curved silver pattern.I do NOT know if they are electronically different, but I would assume they are at least slightly different.