Cache latency. The lower the number the faster access/response times for the memory. In otherwords it takes the machine less time to search for and retrieve the information stored in the ram, thus speeding up system performance.
Cache latency. The lower the number the faster access/response times for the memory. In otherwords it takes the machine less time to search for and retrieve the information stored in the ram, thus speeding up system performance.
There are other things to factor in but yes, lower is faster. So if you had say 2 kits of DDR3 1600 and one was cas 9 and one was cas 7 the cas 7 would be slightly faster.