Pros: Great Item!!! Will run at 1066 with a dual core processor no prob. Unlike what other reviewers have said. I did have to up the voltage on the memory slot but hey it does what is says it will do. Running at its rating of 5-5-5-15.

Cons: None, its memory it does what its supposed to do.

Overall Review: Wish the price didn't come down on it a month later. Might buy more just to have. The motherboard I used which was a Gigabyte EP35-DS3P performed well with the memory and I was able to easily push the memory to where I wanted it to run with this board. People having problems with running at 1066 check your motherboard stats. For example my board will take 1200 mem but will only run at 1066 max.