Found the Crossbow backplate. Now that everything is up and running (Memtest at least), the CPU temp according to the BIOS is 39c at idle. I think I need to lap the TRUE120. NB temp in BIOS is around 45c with the passive sink (removed the waterblock and replaced the TIM with AS5). This is on a Q6600.
Push-pull config with 2x1900rpm Scythe fans...