The cooling of the central processor is still implemented in the TNN500AF with the help of heat pipes. The configuration of the pipes and blocks that transfer heat from the pipes to the case’s side panels has been changed to make the system more versatile and efficient – you don’t have to buy longer pipes for mainboards with a low placement of the CPU socket, while the surface area of the blocks has been enlarged.
The CPU block has been tweaked, too. The copper part that contacts the CPU has a more intricate profile now:
Otherwise, there are no changes: the same sandwich of six heat pipes, a copper base and an aluminum cap is held together with four big screws.
The polishing of the surface of the copper sole is the same: the surface is smooth, but not flat.
The TNN500AF comes with all the necessary fasteners to install the cooling system on Socket 754/939/940 processors from AMD and Socket 478/775 processors from Intel.
Zalman recommends using this cooling system for Athlon 64 processors with ratings up to 3800+ (2.4GHz), for Athlon 64 FX and Opteron processors with frequencies up to 2.4GHz, for Northwood-core Pentium 4 CPUs with frequencies up to 3.4GHz, and for Prescott-core Pentium 4 models with frequencies up to 3.0 (Socket 478) and 3.2GHz (Socket 755).
In fact, according to Zalman’s documentation, the CPU cooling system is capable of handling processors whose heat dissipation is as high as 150 watts. This covers all modern processors, but if you use a CPU with a heat dissipation of 100 watts and higher, Zalman recommends to install a low-speed 120mm fan (with a rotational speed of 1000-1500rpm).