SSD Ultra II 480GB - Spikes/Lags

So far I have not seen what you have posted, but I can tell you that my 1.5 year old Samsung 840 Drive, (when new was 200+ R/W), is now 100+ R/W  while   my Sandisk Ultra II remains 250+ R/W, and both reside on the same system…  Supermicro Server, SATA II, W7-64 here.

All SSD’s here have current firmware… 

???