They may be build on 55nm but the two RV670 chips on the Radeon HD 3870 X2 are perfect candidates for some custom cooling and this is where CoolIT wants to step in. For the Radeon HD 3870 X2 CoolIT is preparing the third installment in the Reference Series line of liquid cooling systems which puts a water and heat together so as to offer low temperatures and enhance the card's overclocking potential with tests already resulting in clocks that reach 900 MHz and even 1 GHz. “Using AMD’s micro-channel technology in a closed loop liquid cooling design, CoolIT is once again enabling users to exploit the full potential of 55nm ATI Radeon™ HD 3800 series architecture while still maintaining a single slot form factor,” stated Dr. Gamal Refai-Ahmed, AMD Fellow and Chief Thermal Architect, AMD Graphics Product Group.