BCC Hardware posted a review on the 4GB DDR2-800 Red memory from Crucial

At the JEDEC settings of DDR2-800 at CL5 the 4GB Ballistix Red kit isn't much more than a pretty red-head in your case. It has some extra value at CL4, and even more value at the impressive DDR2-1000 at CL5. At this speed it is one of the faster 4GB DDR2 kits around and while it isn't the fastest it is pretty darn impressive nevertheless. What makes this kit a must have is the fact that it can overclock well over 1100Mhz making it one of the fastest 4GB DDR2 kits around.

4GB DDR2-800 Red from Crucial Review