I have a matched pair of 2x2g sticks of 667 mhz ram from Dell. It is brand new and still in the box. I paid over $800 bucks for it. It was supposed to go into my Dell Precsion 490 worksatation. I upgraded to a new P.C and did not return the ram in accordance with Dell's 21 day return policy. So I am stuck with it, I tried selling it on ebay, but since it is a high end product no one bought it. It is perfect for a serious trading machine. If interested, P.M and I will sell it at a fraction of the cost since it has been sitting in my closet for 3 months now.