Zalman CNPS6500A-Cu
Material: Copper
Size: 120mmx94x65 (LxWxH)
Weight: 914g
Bundle: Heatsink, 92mm fan and bracket, Fan Mate, thermal paste, mounting hardware
Zalman has made quite a name for themselves the past few years with their revolutionary flower heatsink design. This model is part of their “Computer Noise Prevention System” and is currently their top Pentium 4 heatsink with a newer model, the CNPS6500B-Cu featuring a new retention mechanism using the HSRM. The 6500A utilizes their flower design with large copper blades sandwiched between two aluminum blocks at extremely high pressure. These fins have slots cut into them to promote better air flow to the heatsink base. The base, comprised of copper from the blades and aluminum from the blocks, is extremely well finished and flat; there is no reason to even touch it. The Zalman heatsink, because of the large number of copper blades, is extremely heavy, almost a kilogram, something unheard of in the heatsink industry. The heatsink would create mass havoc in any computer case if it should happen to detach.
The CNPS6500 heatsink, though it uses the mounting holes around the socket, does not cause nearly as much trouble as the Alpha 8942T. Simply put, a riser needs to be placed on each of the four mounting holes via a screw through the backside of the motherboard, and then the heatsink is screwed into the risers with springs to ensure proper mounting pressure. There were not any of the same problems found with removal as with the Alpha heatsink. Zalman, pushing for a quiet computer solution, opted to go with a larger fan that would provide the same flow rate, but with much less noise. Included is a 92mm fan that pushes an estimated 50CFM, on par with the YSTech that will be used with the two aforementioned heatsinks, but with much lower noise levels. The fan is mounted on a bracket which is attached to the first three I/O slots. This bracket allows great freedom in the position of the fan allowing of optimal airflow to the heatsink and as an added bonus, to the surrounding area. It also effectively removes a good amount of the dead spot underneath the rotor. One caveat to this mechanism is that the fan might get in the way when working inside the case or if you are not using a case at all.
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