Thanks for the links to all the discussions about this topic
Some very good information in there!! Scince this is a "Dusty Pockets" project, my pumps are not the best. 1st pump is a bilge pump rated at 600gph, the second is a pond pump rated at 500gph. Both are submersable and unable to connect in series. The water blocks are homemade.
http://forums.procooling.com/vbb/sho...0&postcount=80. Hopefully I'll have the NB and GPU blocks finised this week.