The Northbridge defiantly gets toasty on the Asus boards over 400 FSB.
Just at 400X9 the system stability increased very noticeably water cooled in comparison to an aftermarket air cooled chipset cooler.
I agree with the addition to the loop as the MCP655 dumps enough heat back into the system by itself.
The restriction isnít noticeable until multiple GPUs are water cooled.
When that happens Iíll stick the black Ice Radiator back on and contemplate the purchase of the Iwaki RD 20.
That should solve the restriction problem