Here's the updated version of the coolant loop. Since the voltage regulators on the video card and the Northbridge don't dissipate a lot of power and the HPPS+ pump has a somewhat limited pressure, I split the coolant loops into two. The big loop with 10mm tubes go to the GPU and CPU, while a smaller loop with 6mm hoses go to the GPU VRM and the NB. The hard drive block is after the two loops merge, mostly because I didn't have the fittings to move it into the 6mm loop. I think it would be cooled perfectly fine with less water flow.