Honestly, that memory is a ripoff. You can get 4gb of DDR2 800 with the same timings for the exact same price.http://www.newegg.com/Product/Product.aspx?Item=N82E16820145194
Get those if you really want to stick with corsair.
But theres still a lot of RAM which is cheaper and is still DDR2 800 CAS 4.
EDIT: If you wanted that memory because its "SLI ready" its still not worth it in the least bit.