I am doing a water cooling project for school and want to make as failsafe of a solution as possible. To do so, I am using a small car radiotor to ensure heat dissapation even without a running fan. Leaks are my lest concern but I will go overboard with sealing them. My thought though is on the pumps. I read the post earlier on running in pumps in parallel vs. in series. I have some responses and questions to this. If I use two pumps that are quite more powerful than I really need, would a reduced water flow matter all that much if I used a Y adapter? Also, couldn't impeller pumps be run in series so even if one failed it would not have the probs of pulling the water through to pump. I am also attaching a video card cooler to the system. Were would the optimum placement for this be? In a Y with the CPU? Before or after the the water goes through the CPU? Or on another pump/small radiator assembly sharring the same water reserve? All responses would be greatly apreciated.