The water block used on the HydroCool200 is very compact, and universal. Those running AMD K7 based processors will have an installation bracket, as will those using Intel Pentium 4 processors. Corsair decided it could relieve the consumer of paying for extra blocks, and figured it would be more considerate to build a block universal for today's processors. On the top of the water block is a temperature probe that plugs into the slot plate card. Oddly, the thermal probe is not inserted into the block. Instead, the block is in a metal tube-like section on the top of the water block. Temperature readings are taken off of the top of the block, rather than underneath or inside. At this point, I'm not sure how well this will go over in the overclocking industry, but time will tell.