Yes, 2-2-2 aka CL2 is faster than CL3 but I'm Not sure How much... and I'd like to Know. My QuickSilver came with PC133 CL3 @ 3/4 Gigabyte, so I bought another CL3 half Gig because i heard the Mac will autodetect and will run the slower speed with one CL3 and many CL2s.