as i said that was the response i got over at their forum when i asked about the differences between them

and if you are looking at 800's than yes the evo's are available in cas4 but the evo's in 1066 are cas5..

id still like to know which he ordered the 1066's or the 800's.. the 1066's do seem to be a bit high in price imo at 221$.. depends on how well they oc i guess