Memory PCB Selection Matters
 

We found that at tight timings (2-2-2-5) the difference in PCB's is minimal
and insignificant. So, if you are not an enthusiast/overclocker then this
article will not impact your buying decisions. If you are an overclocker
looking to get the highest possible FSB/Memory performance at loose timings,
then we just showed you a secret that can help you gain up to 42MHz on your
memory overclock....

http://www.legitreviews.com/reviews/memorypcb/