5-5-5-12 compatible with 5-5-5-18?

[Dontcopythatfloppy]

I currently have two sticks of Corsair XMS2 ram in my computer with timings 5-5-5-12. I am considering purchasing this ram: http://www.newegg.com/Product/Product.aspx?Item=N82E16820145590

Will they work together despite the difference in tRAS? Will this affect performance?

 

[Emperus]

Yes they will work together.. But all the memory sticks will run at the lowest timings which here is 5-5-5-18.. Should not worry you much though..