The Danger Den block (model: GPU-6850) is much like the EK version, huge and is installed in a way that makes it sandwiched between the two PCBs. Contact-points on either sides of the block convey heat from the GPUs, memory chips, VRM, NVIO2 processors and the BR-03 chip. The block is available from Danger Den with a variety of options with regard to the fittings.
SLI fittings that relay fluid between accelerators in an SLI system are optional. The block weighs 4 lbs (1.81 kg). It is priced at US $189.95.