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The MCX4000 heatsink is designed exclusively for Intel Pentium 4 processors. This product aims at offering the absolute ultimate performance in air cooling, and enabling users with the widest possible range of applications from ultra-quiet to extreme overclocking. The MCX4000 heatsink can be used with either 70mm or 80mm fans.
Features:
Construction: hybrid copper base, thin aluminum pin heatsink. The 3/8" thick copper base provides mass for superior energy absorption. The thin aluminum pins promote increased turbulence for more efficient heat dissipation compared to traditional fin extrusions.
Patented Helicoid pin design (U.S. patent 6,469,898): pins are individually machined in an helicoid shape, to increase their surface area, and further enhance heat dissipation efficiency.
70mm and 80mm fan compatibility : allows users to install any 70 or 80mm fan, providing optimum choice in noise vs. performance . Extreme overclockers will be also be able to use ultra high-flow 80mm fans, such as shown in the example below.
Exceptional quality and attention to details: the heatsink base is lapped flat to 3/10 of 1/1000", and polished to near-mirror finish to promote optimum thermal conductivity.
Specifications:
Heatsink Base: CNC machined, C110 copper base, 3.14"W x 3.5"L x .375"H, flatness better than 0.001", micro surface finish 8 or better.
429 Helicoid Pins made of High Thermal Conductivity Aluminum Alloy, press fitted in the base.
Overall Heatsink Dimensions: 3.14"x3.5"x1.55"
Weight: 21oz (600g)
Retention Mechanism* Motherboard Fittings: 6-32 Female to Male 1/4" aluminum round standoffs with nylon washers and nylons nuts. 4 compression springs providing exact specified pressure per chip manufacturers. 70mm and 80mm fan mounting screws
*Notes: The retention mechanism is designed to prevent damage to the processor during installation or removal of the heatsink, or during shipping of a completely assembled computers. The heatsink anchors to four steel standoffs bolted to the motherboard with lock-nuts. Installation of the standoffs requires removal of the motherboard from the computer case.