Pros: I went from 512MB to 2GB dual channel, and all I have to say is WOW!! These sticks move like theres no tomarrow. My system even reads them as 2GB exact. If you need speed these are great.

Cons: None

Pros: It works great and I have another fan in the back and with both of them running together, my PC stays at about 25-35 degrees, even under long and stressfull hours of gaming.

Cons: none

Overall Review: Mine came with 4 screws, but I know some people didnt get any.